charging FORD MONDEO 1993 Service Repair Manual
[x] Cancel search | Manufacturer: FORD, Model Year: 1993, Model line: MONDEO, Model: FORD MONDEO 1993Pages: 279, PDF Size: 12.71 MB
Page 12 of 279
0•12
When jump-starting a car using a
booster battery, observe the following
precautions:
A)Before connecting the booster
battery, make sure that the ignition is
switched off.
B)Ensure that all electrical equipment
(lights, heater, wipers, etc) is
switched off.C)Make sure that the booster battery is
the same voltage as the discharged
one in the vehicle.
D)If the battery is being jump-started
from the battery in another vehicle,
the two vehcles MUST NOT TOUCH
each other.
E)Make sure that the transmission is in
neutral (or PARK, in the case of
automatic transmission).
Jump starting will get you out
of trouble, but you must correct
whatever made the battery go
flat in the first place. There are
three possibilities:
1The battery has been drained by
repeated attempts to start, or by
leaving the lights on.
2The charging system is not working
properly (alternator drivebelt slack
or broken, alternator wiring fault or
alternator itself faulty).
3The battery itself is at fault
(electrolyte low, or battery worn out).
Connect one end of the red jump lead to
the positive (+) terminal of the flat
batteryConnect the other end of the red lead to
the positive (+) terminal of the booster
battery.Connect one end of the black jump lead
to the negative (-) terminal of the
booster battery
Connect the other end of the black
jump lead to a bolt or bracket on the
engine block, well away from the
battery, on the vehicle to be started.
123
4
Make sure that the jump leads will not
come into contact with the fan, drive-
belts or other moving parts of the
engine.5
Start the engine using the booster
battery, then with the engine running at
idle speed, disconnect the jump leads in
the reverse order of connection.6
Roadside Repairs
Booster battery (jump) starting
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Page 15 of 279
Chapter 1 Routine maintenance and servicing
Air conditioning system check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Air filter element renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Automatic transmission fluid level check . . . . . . . . . . . . . . . . . . . . . 7
Automatic transmission linkage lubrication . . . . . . . . . . . . . . . . . . . 18
Auxiliary drivebelt check and renewal . . . . . . . . . . . . . . . . . . . . . . . . 11
Battery check, maintenance and charging . . . . . . . . . . . . . . . . . . . . 9
Brake check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Brake fluid renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Clutch pedal adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Coolant renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2, 28
Door and bonnet check and lubrication . . . . . . . . . . . . . . . . . . . . . . 24
Driveshaft rubber gaiter and CV joint check . . . . . . . . . . . . . . . . . . . 20
Electrical system check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Engine compartment wiring check . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Engine oil and filter change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Exhaust system check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Fluid level checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Fuel filter renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Idle speed and mixture check and adjustment . . . . . . See Chapter 4Ignition timing check . . . . . . . . . . . . . . . . . . . . . . . . . . See Chapter 5
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Manual transmission oil level check . . . . . . . . . . . . . . . . . . . . . . . . . 16
Positive Crankcase Ventilation (PCV) system check
and filter cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Power steering fluid level check . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Road test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Roadwheel nut tightness check . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Seat belt check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Spark plug renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . See end of Chapter
Steering, suspension and roadwheel check . . . . . . . . . . . . . . . . . . . 19
Timing belt renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Tyre and tyre pressure checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Underbody and fuel/brake line check . . . . . . . . . . . . . . . . . . . . . . . . 22
Underbonnet check for fluid leaks and hose condition . . . . . . . . . . 12
Ventilation system pollen filter renewal . . . . . . . . . . . . . . . . . . . . . . . 27
Windscreen/tailgate washer system and wiper blade check . . . . . . 6
1•1
Easy,suitable for
novice with little
experienceFairly easy,suitable
for beginner with
some experienceFairly difficult,suitable
for competent DIY
mechanicDifficult,suitable for
experienced DIY
mechanicVery difficult,
suitable for expert DIY
or professional
Degrees of difficulty Contents
1
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Page 22 of 279
15Coolant hydrometers are available at
most automotive accessory shops. If the
specific gravity of a sample taken from the
expansion tank (when the engine is switched
off and fully cooled down) is less than that
specified, the coolant mixture strength has
fallen below the minimum. If this is found,
either the coolant strength must be restored
by adding neat antifreeze to Ford’s
specification (if that is what is in the system)
or by draining and flushing the system, then
refilling it with fresh coolant mixture of the
correct ratio (if any other type of antifreeze is
being used).
16When checking the coolant level, always
note its condition; it should be relatively clear.
If it is brown or rust-coloured, the system
should be drained, flushed and refilled. If
antifreeze has been used which does not
meet Ford’s specification, its corrosion
inhibitors will lose their effectiveness with
time; such coolant must be renewed regularly,
even if it appears to be in good condition,
usually at the intervals suggested at the
beginning of Section 2 of this Chapter.
Windscreen/tailgate and
headlight washer fluid
17Fluid for the windscreen/tailgate washer
system (and where applicable the headlight
washer system) is stored in a plastic reservoir,
which is located at the right front corner of the
engine compartment. In milder climates, plain
water can be used to top-up the reservoir, but
the reservoir should be kept no more than
two-thirds full, to allow for expansion should
the water freeze. In colder climates, the use of
a specially-formulated windscreen washer
fluid, available at your dealer or any car
accessory shop, will help lower the freezing
point of the fluid (see illustration). Do notuse
regular (engine) antifreeze - it will damage the
vehicle’s paintwork.
Battery electrolyte
18On models not equipped with a sealed
battery (see Section 9), check the electrolyte
level of all six battery cells. The level must be
approximately 10 mm above the plates; this
may be shown by maximum and minimum
level lines marked on the battery’s casing (seeillustration). If the level is low, use a coin to
release the filler/vent cap, and add distilled
water. Install and securely retighten the cap.
Caution: Overfilling the cells may
cause electrolyte to spill over
during periods of heavy charging,
causing corrosion or damage.
Refer also to the warning at the beginning
of Section 9.
Brake fluid
19The brake fluid reservoir is located on the
top of the brake master cylinder, which is
attached to the front of the vacuum servo unit.
The “MAX” and “MIN” marks are indicated on
the side of the translucent reservoir, and the
fluid level should be maintained between
these marks at all times (see illustration).
20The brake fluid inside the reservoir is
readily visible. With the vehicle on level
ground, the level should normally be on or just
below the “MAX” mark.
21Progressive wear of the brake pads and
brake shoe linings causes the level of the
brake fluid to gradually fall; however, when
the brake pads are renewed, the original level
of the fluid is restored. It is not therefore
necessary to top-up the level to compensate
for this minimal drop, but the level must never
be allowed to fall below the minimum mark.
22If topping-up is necessary, first wipe the
area around the filler cap with a clean rag
before removing the cap. When adding fluid,
pour it carefully into the reservoir, to avoid
spilling it on surrounding painted surfaces
(see illustration). Be sure to use only the
specified hydraulic fluid (see “Lubricants,
fluids and capacities”at the start of this
Chapter) since mixing different types of fluid
can cause damage to the system.
Warning: Brake hydraulic fluid
can harm your eyes and damage
painted surfaces, so use extreme
caution when handling and
pouring it. Wash off spills immediately with
plenty of water. Do not use fluid that has
been standing open for some time, as it
absorbs moisture from the air. Excessmoisture can cause corrosion and a
dangerous loss of braking effectiveness.
23When adding fluid, it is a good idea to
inspect the reservoir for contamination. The
system should be drained and refilled if
deposits, dirt particles or contamination are
seen in the fluid.
24After filling the reservoir to the correct
level, make sure that the cap is refitted
securely, to avoid leaks and the entry of
foreign matter.
25If the reservoir requires repeated
replenishing to maintain the correct level, this
is an indication of an hydraulic leak
somewhere in the system, which should be
investigated immediately.
Power steering fluid
26See Section 5 of this Chapter.
1Periodic inspection of the tyres may spare
you from the inconvenience of being stranded
with a flat tyre. It can also provide you with
vital information regarding possible problems
in the steering and suspension systems
before major damage occurs.
2The original tyres on this vehicle are
equipped with tread wear indicator (TWI)
bands, which will appear when the tread
depth reaches approximately 1.6 mm. Most
tyres have a mark around the tyre at regular
intervals to indicate the location of the tread
4 Tyre and tyre pressure checks
1•8
3.17 Topping-up the windscreen washer
reservoir3.18 On non-sealed batteries, keep the
electrolyte level of all the cells in the
battery between the maximum and
minimum levels (arrowed) - ie, 10 mm
above the plates. Use only distilled water,
and never overfill3.19 Brake fluid reservoir, showing “MAX”
and “MIN” marks
3.22 Topping-up the brake fluid reservoir
Weekly checks
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Page 25 of 279
Every 10 000 miles or 12 months
1•11
17.4 Removing the automatic transmission
dipstick from its tube7.6A “MIN” and “MAX” marks on the
dipstick7.6B Adding automatic transmission fluid
through the dipstick tube
Every 10 000 miles
1The level of the automatic transmission fluid
should be carefully maintained. Low fluid level
can lead to slipping or loss of drive, while
overfilling can cause foaming, loss of fluid and
transmission damage.
2The transmission fluid level should only be
checked when the transmission is hot (at its
normal operating temperature). If the vehicle
has just been driven over 10 miles (15 miles in
a cold climate), and the fluid temperature is
160 to 175°F, the transmission is hot.
Caution: If the vehicle has just
been driven for a long time at
high speed or in city traffic in hot
weather, or if it has been pulling
a trailer, an accurate fluid level reading
cannot be obtained. In these
circumstances, allow the fluid to cool
down for about 30 minutes.
3Park the vehicle on level ground, apply the
handbrake, and start the engine. While the
engine is idling, depress the brake pedal and
move the selector lever through all the gear
ranges three times, beginning and ending in
“P”.
4Allow the engine to idle for one minute, then
(with the engine still idling) remove the dipstick
from its tube (see illustration). Note the
condition and colour of the fluid on the dipstick.
5Wipe the fluid from the dipstick with a clean
rag, and re-insert it into the filler tube until the
cap seats.
6Pull the dipstick out again, and note the
fluid level. The level should be between the
“MIN” and “MAX” marks. If the level is on the
“MIN” mark, stop the engine, and add the
specified automatic transmission fluid through
the dipstick tube, using a clean funnel if
necessary (see illustrations). It is important
not to introduce dirt into the transmission
when topping-up.
7Add the fluid a little at a time, and keep
checking the level as previously described
until it is correct.8The need for regular topping-up of the
transmission fluid indicates a leak, which
should be found and rectified without delay.
9The condition of the fluid should also be
checked along with the level. If the fluid at the
end of the dipstick is black or a dark reddish-
brown colour, or if it has a burned smell, the
fluid should be changed. If you are in doubt
about the condition of the fluid, purchase
some new fluid, and compare the two for
colour and smell.
1Check the operation of all external lights
and indicators (front and rear).
2Check for satisfactory operation of the
instrument panel, its illumination and warning
lights, the switches and their function lights.
3Check the horn(s) for satisfactory operation.
4Check all other electrical equipment for
satisfactory operation.
5Check all electrical wiring in the engine
compartment for correct routing, and for any
signs of physical or heat-damage or chafing.
Warning: Certain precautions
must be followed when checking
and servicing the battery.
Hydrogen gas, which is highly
flammable, is always present in the battery
cells, so keep lighted tobacco and all other
open flames and sparks away from the
battery. The electrolyte inside the battery
is actually dilute sulphuric acid, which will
cause injury if splashed on your skin or in
your eyes. It will also ruin clothes and
painted surfaces. When disconnecting the
battery, always detach the negative (earth)
lead first and connect it last!
Note: Before disconnecting the battery, refer
to Section 1 of Chapter 5.
9 Battery check, maintenance
and charging
8 Electrical system check
7 Automatic transmission fluid
level check
9.1 Tools and materials required for
battery maintenance
1Face shield/safety goggles- When
removing corrosion with a brush, the acidic
particles can easily fly up into your eyes
2Baking soda- A solution of baking soda
and water can be used to neutralise corrosion
3Petroleum jelly- A layer of this on the
battery terminals will help prevent corrosion
4Battery terminal/lead cleaner- This wire
brush cleaning tool will remove all traces of
corrosion from the battery terminals and lead
clamps
5Treated felt washers- Placing one of
these on each terminal, directly under the
lead clamps, will help prevent corrosion
6Puller- Sometimes the lead clamps are
very difficult to pull off the terminals, even
after the nut has been completely slackened.
This tool pulls the clamp straight up and off
the terminal without damage
7Battery terminal/lead cleaner- Here is
another cleaning tool which is a slightly
different version of number 4 above, but does
the same thing
8Rubber gloves- Another safety item to
consider when servicing the battery;
remember, that’s acid inside the battery!
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General
1A routine preventive maintenance
programme for the battery in your vehicle is
the only way to ensure quick and reliable
starts. Before performing any battery
maintenance, make sure that you have the
proper equipment necessary to work safely
around the battery (see illustration).
2There are also several precautions that
should be taken whenever battery
maintenance is performed. Before servicing
the battery, always turn the engine and all
accessories off, and disconnect the lead from
the negative terminal of the battery - see
Chapter 5, Section 1.
3The battery produces hydrogen gas, which
is both flammable and explosive. Never create
a spark, smoke, or light a match around the
battery. Always charge the battery in a well-
ventilated area.
4Electrolyte contains poisonous and
corrosive sulphuric acid. Do not allow it to get
in your eyes, on your skin, or on your clothes.
Never ingest it. Wear protective safety glasses
when working near the battery. Keep children
away from the battery.
5Note the external condition of the battery. If
the positive terminal and lead clamp on your
vehicle’s battery is equipped with a plastic
cover or rubber protector, make sure that it’s
not torn or damaged. It should completelycover the terminal. Look for any corroded or
loose connections, cracks in the case or
cover, or loose hold-down clamps. Also check
the entire length of each lead for cracks and
frayed conductors.
6If corrosion, which looks like white, fluffy
deposits (see illustration)is evident,
particularly around the terminals, the battery
should be removed for cleaning. Slacken the
lead clamp nuts with a spanner, being careful
to remove the negative (earth) lead first, and
slide them off the terminals (see illustration).
Then unscrew the hold-down clamp nuts,
remove the clamp, and lift the battery from the
engine compartment.
7Clean the lead clamps thoroughly, using a
soft wire brush or a terminal cleaner, with a
solution of warm water and baking soda.
Wash the terminals and the top of the battery
case with the same solution, but make sure
that the solution doesn’t get into the battery.
When cleaning the leads, terminals and
battery top, wear safety goggles and rubber
gloves, to prevent any solution from coming in
contact with your eyes or hands. Wear old
clothes too - even when diluted, sulphuric
acid splashed onto clothes will burn holes in
them. If the terminals have been extensively
corroded, clean them up with a terminal
cleaner (see illustrations). Thoroughly wash
all cleaned areas with plain water.
8Make sure that the battery tray is in good
condition and the hold-down clamp nuts are
tight (see illustration). If the battery isremoved from the tray, make sure no parts
remain in the bottom of the tray when the
battery is refitted. When refitting the
hold-down clamp nuts, do not overtighten
them.
9Information on removing and installing the
battery can be found in Chapter 5. Information
on jump starting can be found at the front of
this manual. For more detailed battery
checking procedures, refer to the Haynes
Automobile Electrical and Electronic Systems
Manual.
Cleaning
10Corrosion on the hold-down components,
battery case and surrounding areas can be
removed with a solution of water and baking
soda. Thoroughly rinse all cleaned areas with
plain water.
11Any metal parts of the vehicle damaged
by corrosion should be covered with a
zinc-based primer, then painted.
Charging
Warning: When batteries are
being charged, hydrogen gas,
which is very explosive and
flammable, is produced. Do not
smoke, or allow open flames, near a
charging or a recently-charged battery.
Wear eye protection when near the battery
during charging. Also, make sure the
charger is unplugged before connecting or
disconnecting the battery from the
charger.
12Slow-rate charging is the best way to
restore a battery that’s discharged to the
point where it will not start the engine. It’s also
a good way to maintain the battery charge in a
vehicle that’s only driven a few miles between
starts. Maintaining the battery charge is
particularly important in winter, when the
battery must work harder to start the engine,
and electrical accessories that drain the
battery are in greater use.
13It’s best to use a one- or two-amp battery
charger (sometimes called a “trickle” charger).
They are the safest, and put the least strain on
the battery. They are also the least expensive.
For a faster charge, you can use a higher-
1•12
9.6A Battery terminal corrosion usually
appears as light, fluffy powder9.6B Removing a lead from the battery
terminal - always remove the earth lead
first, and connect it last!9.7A When cleaning the lead clamps, all
corrosion must be removed - the inside of
the clamp is tapered to match the terminal,
so don’t remove too much material
9.7B Regardless of the method used to
clean the terminals, a clean, shiny surface
should result9.8 Make sure the battery hold-down nuts
(arrowed) are tight
Every 10 000 miles
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Page 27 of 279
amperage charger, but don’t use one rated
more than 1/10th the amp/hour rating of the
battery (ie no more than 5 amps, typically).
Rapid boost charges that claim to restore the
power of the battery in one to two hours are
hardest on the battery, and can damage
batteries not in good condition. This type of
charging should only be used in emergency
situations.
14The average time necessary to charge a
battery should be listed in the instructions that
come with the charger. As a general rule, a
trickle charger will charge a battery in 12 to
16 hours.
1Check the seat belts for satisfactory
operation and condition. Inspect the webbing
for fraying and cuts. Check that they retract
smoothly and without binding into their reels.
2Check that the seat belt mounting bolts are
tight, and if necessary tighten them to the
specified torque wrench setting.
General
1The auxiliary drivebelt is of the flat, multi-
ribbed (or “polyvee”) type, and is located on
the right-hand end of the engine. It drives the
alternator, water pump, power steering pump
and (when fitted) the air conditioning
compressor from the engine’s crankshaft
pulley.
2The good condition and proper tension of
the auxiliary drivebelt is critical to the
operation of the engine. Because of their
composition and the high stresses to which
they are subjected, drivebelts stretch anddeteriorate as they get older. They must,
therefore, be regularly inspected.
Check
3With the engine switched off, open and
support the bonnet, then locate the auxiliary
drivebelt on the right-hand end of the engine,
under the engine right-hand mounting
bracket. (Be very careful, and wear protective
gloves to minimise the risk of burning your
hands on hot components, if the engine has
recently been running.) For improved access,
jack up the front right-hand side of the
vehicle, support it securely on an axle stand,
remove the roadwheel, then remove the
auxiliary drivebelt cover (two fasteners) from
inside the wheel arch (see illustration).
4Using an inspection light or a small electric
torch, and rotating the engine when necessary
with a spanner applied to the crankshaft
pulley bolt, check the whole length of the
drivebelt for cracks, separation of the rubber,
and torn or worn ribs (see illustration). Also
check for fraying and glazing, which gives the
drivebelt a shiny appearance. Both sides of
the drivebelt should be inspected, which
means you will have to twist the drivebelt to
check the underside. Use your fingers to feel
the drivebelt where you can’t see it. If you are
in any doubt as to the condition of the
drivebelt, renew it (go to paragraph 7).
Drivebelt tension
5The auxiliary drivebelt is tensioned by an
automatic tensioner; regular checks are not
required, and manual “adjustment” is not
possible.
6If you suspect that the drivebelt is slipping
and/or running slack, or that the tensioner is
otherwise faulty, it must be renewed. To do
this, remove the drivebelt as described below,
then unbolt the tensioner (two Torx-type
screws accessible from underneath, via the
wheel arch) from the alternator mounting
bracket (see illustration). On fitting the new
tensioner, ensure it is aligned correctly on its
mountings, and tighten the screws to the
specified torque wrench setting.
Renewal
7Open the bonnet. Jack up the front right-
hand side of the vehicle and support it
securely on an axle stand, remove the
roadwheel, then remove the auxiliary drivebelt
cover (two fasteners) from inside the wheel
arch.
8If the existing drivebelt is to be refitted,
mark it, or note the maker’s markings on its
flat surface, so that it can be installed the
same way round.
9Reaching up between the body and the
engine (above and to the rear of the
crankshaft pulley), apply a spanner to the
hexagon in the centre of the automatic
tensioner’s pulley. Rotate the tensioner pulley
clockwise to release its pressure on the
drivebelt, then slip the drivebelt off the
crankshaft pulley, and release the tensioner
again (see illustration). Working from the
wheel arch or engine compartment as
necessary, and noting its routing, slip the
drivebelt off the remaining pulleys and
withdraw it.
10Check all the pulleys, ensuring that their
grooves are clean, and removing all traces of
oil and grease. Check that the tensioner
works properly, with strong spring pressure
11 Auxiliary drivebelt check and
renewal
10 Seat belt check
1•13
1
11.9 Rotate the tensioner pulley clockwise
to release its pressure on the drivebelt,
then slip the drivebelt off the crankshaft
pulley
11.3 Removing the auxiliary drivebelt
cover - it is secured by a fastener at each
end (arrowed) - from inside the right-hand
front wheel arch
11.4 Check the auxiliary drivebelt for signs
of wear like these. Very small cracks across
the drivebelt ribs are acceptable. If the
cracks are deep, or if the drivebelt looks
worn or damaged in any other way, renew it
11.6 The auxiliary drivebelt is tensioned by
an automatic tensioner; Torx screws
(arrowed) secure it to alternator mounting
bracket
Every 10 000 miles
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Chapter 5 Engine electrical systems
Alternator - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Alternator brushes and voltage regulator - renewal . . . . . . . . . . . . . 13
Auxiliary drivebelt check and renewal . . . . . . . . . . . . . See Chapter 1
Battery - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Battery check, maintenance and charging . . . . . . . . . See Chapter 1
Battery leads - check and renewal . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Charging system - general information and precautions . . . . . . . . . 10
Charging system - testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Crankshaft speed/position sensor - checking, removal and refitting 9
Electronic control system - information and
fault diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Chapter 6
Electronic Control Unit (ECU) and system information
sensors - general information . . . . . . . . . . . . . . . . . See Chapter 6Engine compartment wiring check . . . . . . . . . . . . . . . See Chapter 1
General information, precautions and battery disconnection . . . . . . 1
Ignition coil - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Ignition module (automatic transmission models only) -
removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Ignition system - general information and precautions . . . . . . . . . . . 4
Ignition system - testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Ignition timing - checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Spark plug renewal and HT lead check . . . . . . . . . . . . See Chapter 1
Starter motor - brush and solenoid renewal . . . . . . . . . . . . . . . . . . . 17
Starter motor - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . 16
Starting system - general information and precautions . . . . . . . . . . 14
Starting system - testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Battery
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lead-acid
Rating - Cold cranking/Reserve capacity . . . . . . . . . . . . . . . . . . . . . . . 500 A/75 RC, 590 A/95 RC, or 650 A/130 RC
Ignition timing
Nominal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10° ± 2° BTDC
Note:Ignition timing is under control of ECU - it may vary constantly at idle speed, and is not adjustable.
Ignition coil
Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.0 kilovolts (minimum)
Primary resistances - measured at coil connector terminal pins . . . . . . 0.50 ± 0.05 ohms
Alternator
Type:Model Rated output
Bosch unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NC 14V 60-90A 90A
Mitsubishi unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A004T 90A
Minimum brush length - all types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0 mm
Regulated voltage @ 4000 (engine) rpm and 3 to 7 amp load - all types .13.5 to 14.6 volts
Starter motor
Type:Model Rated output
Bosch unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DW 1.1 or 1.4 kW
Lucas/Magneti Marelli unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M79 1.0 kW
Minimum brush length - all types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.0 mm
Commutator minimum diameter:
Bosch units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32.8 mm
Lucas/Magneti Marelli unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Not available
Armature endfloat:
Bosch units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.30 mm
Lucas/Magneti Marelli unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.25 mm
Torque wrench settingsNm lbf ft
Crankshaft speed/position sensor:
Sensor-to-bracket screw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 to 9 4 to 6
Bracket-to-cylinder block crankcase screw . . . . . . . . . . . . . . . . . . . . 21 15
Ignition coil bracket-to-cylinder head screws . . . . . . . . . . . . . . . . . . . . 21 15
Alternator mounting bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 37
Starter motor mounting bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 26
5•1
Easy,suitable for
novice with little
experienceFairly easy,suitable
for beginner with
some experienceFairly difficult,suitable
for competent DIY
mechanicDifficult,suitable for
experienced DIY
mechanicVery difficult,
suitable for expert DIY
or professional
Degrees of difficulty
Specifications Contents
5
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Page 112 of 279
General information
The engine electrical systems include all
ignition, charging and starting components.
Because of their engine-related functions,
these components are discussed separately
from body electrical devices such as the
lights, the instruments, etc (which are
included in Chapter 12).
Precautions
Always observe the following precautions
when working on the electrical system:
(a) Be extremely careful when servicing
engine electrical components. They are
easily damaged if checked, connected or
handled improperly.
(b) Never leave the ignition switched on for
long periods of time when the engine is
not running.
(c) Don’t disconnect the battery leads while
the engine is running.
(d) Maintain correct polarity when connecting
a battery lead from another vehicle during
jump starting - see the “Booster battery
(jump) starting” section at the front of this
manual.
(e) Always disconnect the negative lead first,
and reconnect it last, or the battery may
be shorted by the tool being used to
loosen the lead clamps (see illustration).
It’s also a good idea to review the safety-
related information regarding the engine
electrical systems located in the “Safety first!”
section at the front of this manual, before
beginning any operation included in this Chapter.
Battery disconnection
Several systems fitted to the vehicle require
battery power to be available at all times, either
to ensure their continued operation (such as
the clock) or to maintain control unit memories
(such as that in the engine management
system’s ECU) which would be wiped if the
battery were to be disconnected. Whenever thebattery is to be disconnected therefore, first
note the following, to ensure that there are no
unforeseen consequences of this action:
(a) First, on any vehicle with central locking, it
is a wise precaution to remove the key
from the ignition, and to keep it with you,
so that it does not get locked in if the
central locking should engage accidentally
when the battery is reconnected!
(b) The engine management system’s ECU will
lose the information stored in its memory -
referred to by Ford as the “KAM” (Keep-
Alive Memory) - when the battery is
disconnected. This includes idling and
operating values, and any fault codes
detected - in the case of the fault codes, if it
is thought likely that the system has
developed a fault for which the
corresponding code has been logged, the
vehicle must be taken to a Ford dealer for
the codes to be read, using the special
diagnostic equipment necessary for this (see
Chapter 6). Whenever the battery is
disconnected, the information relating to idle
speed control and other operating values will
have to be re-programmed into the unit’s
memory. The ECU does this by itself, but
until then, there may be surging, hesitation,
erratic idle and a generally inferior level of
performance. To allow the ECU to relearn
these values, start the engine and run it as
close to idle speed as possible until it
reaches its normal operating temperature,
then run it for approximately two minutes at
1200 rpm. Next, drive the vehicle as far as
necessary - approximately 5 miles of varied
driving conditions is usually sufficient - to
complete the relearning process.
(c) If the battery is disconnected while the
alarm system is armed or activated, the
alarm will remain in the same state when
the battery is reconnected. The same
applies to the engine immobiliser system
(where fitted).
(d) If a trip computer is in use, any
information stored in memory will be lost.
(e) If a Ford “Keycode” audio unit is fitted,
and the unit and/or the battery is
disconnected, the unit will not function
again on reconnection until the correct
security code is entered. Details of thisprocedure, which varies according to the
unit and model year, are given in the
“Ford Audio Systems Operating Guide”
supplied with the vehicle when new, with
the code itself being given in a “Radio
Passport” and/or a “Keycode Label” at
the same time. Ensure you have the
correct code before you disconnect the
battery. For obvious security reasons, the
procedure is not given in this manual. If
you do not have the code or details of the
correct procedure, but can supply proof
of ownership and a legitimate reason for
wanting this information, the vehicle’s
selling dealer may be able to help.
Devices known as “memory-savers” (or
“code-savers”) can be used to avoid some of
the above problems. Precise details vary
according to the device used. Typically, it is
plugged into the cigarette lighter, and is
connected by its own wires to a spare battery;
the vehicle’s own battery is then disconnected
from the electrical system, leaving the
“memory-saver” to pass sufficient current to
maintain audio unit security codes and ECU
memory values, and also to run permanently-
live circuits such as the clock, all the while
isolating the battery in the event of a short-
circuit occurring while work is carried out.
Warning: Some of these devices
allow a considerable amount of
current to pass, which can mean
that many of the vehicle’s systems are still
operational when the main battery is
disconnected. If a “memory-saver” is used,
ensure that the circuit concerned is
actually “dead” before carrying out any
work on it!
Note:See also the relevant Sections of
Chapter 1.
1Disconnect the battery leads, negative
(earth) lead first - see Section 1.
2Remove the battery hold-down clamp (see
illustrations).
3Lift out the battery. Be careful - it’s heavy.
4While the battery is out, inspect the tray for
corrosion (see Chapter 1).
2 Battery- removal and refitting
1 General information,
precautions and battery
disconnection
5•2 Engine electrical systems
1.2 Always disconnect battery - negative
(earth) lead first - to prevent the possibility
of short-circuits2.2A Unscrew hold-down nuts (one of two
arrowed) . . .2.2B . . . and withdraw hold-down clamp
to release battery
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5Undo the sensor’s retaining screw and
withdraw the sensor. The sensor’s bracket
cannot be unbolted from the cylinder
block/crankcase unless the transmission and
flywheel/driveplate have been removed (see
Chapter 2).
6Refitting is the reverse of the removal
procedure.
General information
The charging system includes the
alternator, an internal voltage regulator, a no-
charge (or “ignition”) warning light, the
battery, and the wiring between all the
components. The charging system supplies
electrical power for the ignition system, the
lights, the radio, etc. The alternator is driven
by the auxiliary drivebelt at the front (right-
hand end) of the engine.
The purpose of the voltage regulator is to
limit the alternator’s voltage to a preset value.
This prevents power surges, circuit overloads,
etc., during peak voltage output.
The charging system doesn’t ordinarily
require periodic maintenance. However, the
drivebelt, battery and wires and connections
should be inspected at the intervals outlined
in Chapter 1.
The dashboard warning light should come
on when the ignition key is turned to positions
“II” or “III”, then should go off immediately the
engine starts. If it remains on, or if it comes on
while the engine is running, there is a
malfunction in the charging system (see
Section 11). If the light does not come on
when the ignition key is turned, and the bulb is
sound (see Chapter 12), there is a fault in the
alternator.
Precautions
Be very careful when making electrical
circuit connections to a vehicle equipped with
an alternator, and note the following:
(a) When reconnecting wires to the alternator
from the battery, be sure to note the
polarity.
(b) Before using arc-welding equipment to
repair any part of the vehicle, disconnect
the wires from the alternator and the
battery terminals.
(c) Never start the engine with a battery
charger connected.
(d) Always disconnect both battery leads
before using a battery charger.
(e) The alternator is driven by an engine
drivebelt which could cause serious injury
if your hand, hair or clothes become
entangled in it with the engine running.
(f) Because the alternator is connected
directly to the battery, it could arc or
cause a fire if overloaded or shorted-out.
(g) Wrap a plastic bag over the alternator,
and secure it with rubber bands, beforesteam-cleaning or pressure-washing the
engine.
(h) Never disconnect the alternator terminals
while the engine is running.
1If a malfunction occurs in the charging
circuit, don’t automatically assume that the
alternator is causing the problem. First check
the following items:
(a) Check the tension and condition of the
auxiliary drivebelt - renew it if it is worn or
deteriorated (see Chapter 1).
(b) Ensure the alternator mounting bolts and
nuts are tight.
(c) Inspect the alternator wiring harness and
the electrical connections at the
alternator; they must be in good
condition, and tight.
(d) Check the large main fuses in the engine
compartment (see Chapter 12). If any is
blown, determine the cause, repair the
circuit and renew the fuse (the vehicle
won’t start and/or the accessories won’t
work if the fuse is blown).
(e) Start the engine and check the alternator
for abnormal noises - for example, a
shrieking or squealing sound may indicate
a badly-worn bearing or brush.
(f) Make sure that the battery is fully-charged
- one bad cell in a battery can cause
overcharging by the alternator.
(g) Disconnect the battery leads (negative
first, then positive). Inspect the battery
posts and the lead clamps for corrosion.
Clean them thoroughly if necessary (see
Section 3 and Chapter 1). Reconnect the
lead to the negative terminal.
(h) With the ignition and all accessories
switched off, insert a test light between
the battery negative post and the
disconnected negative lead clamp:
(1) If the test light does not come on, re-
attach the clamp and proceed to the next
step.
(2) If the test light comes on, there is a short
in the electrical system of the vehicle. The
short must be repaired before the
charging system can be checked.
(3) To find the short, disconnect the
alternator wiring harness:
(a) If the light goes out, the alternator is
at fault.
(b) If the light stays on, remove each fuse
until it goes out - this will tell you
which component is short-circuited.
2Using a voltmeter, check the battery
voltage with the engine off. It should be
approximately 12 volts.
3Start the engine and check the battery
voltage again. Increase engine speed until the
voltmeter reading remains steady; it should
now be approximately 13.5 to 14.6 volts.
4Switch on as many electrical accessories
(eg the headlights, heated rear window andheater blower) as possible, and check that the
alternator maintains the regulated voltage at
around 13 to 14 volts. The voltage may drop
and then come back up; it may also be
necessary to increase engine speed slightly,
even if the charging system is working
properly.
5If the voltage reading is greater than the
specified charging voltage, renew the voltage
regulator (see Section 13).
6If the voltmeter reading is less than that
specified, the fault may be due to worn
brushes, weak brush springs, a faulty voltage
regulator, a faulty diode, a severed phase
winding, or worn or damaged slip rings. The
brushes and slip rings may be checked (see
Section 13), but if the fault persists, the
alternator should be renewed or taken to an
auto-electrician for testing and repair.
1Disconnect the battery negative (earth) lead
- see Section 1.
2Remove the plenum chamber (see Chap-
ter 4).
3Unscrew the nuts to disconnect the wiring
from the alternator (see illustration). If
additional working clearance is required, undo
the right-hand of the three screws securing
the wiring “rail” to the rear of the inlet
manifold.
4Jack up and support the front right-hand
corner of the vehicle. Remove the auxiliary
drivebelt and the engine oil filter - place a wad
of rag to soak up the spilled oil (see Chap-
ter 1). Rather than refit a used filter, you are
advised to drain the engine oil, and then to fit
a new filter and refill the engine with clean oil
on reassembly. Where an engine oil cooler is
fitted, it may prove necessary to remove this
as well, to provide the clearance necessary to
remove the alternator (see Chapter 2, Part A).
5Unscrew the two bolts securing the power
steering system pipes to the right-hand side
of the front suspension subframe. With the
front wheels in the straight-ahead position,
disconnect the right-hand track rod end from
the steering knuckle (see Chapter 10).
6Remove the mounting bolts and nuts (one
12 Alternator-
removal and refitting
11 Charging system- testing
10 Charging system - general
information and precautions
Engine electrical systems 5•5
5
12.3 Disconnecting alternator wiring
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Page 116 of 279
at the top, two at the bottom). Withdraw the
alternator from the engine, and manoeuvre it
out through the wheel arch (see illustration).
Do not drop it, it is fragile.
7If you are renewing the alternator, take the
old one with you when purchasing a
replacement unit. Make sure that the new or
rebuilt unit is identical to the old alternator.
Look at the terminals - they should be the
same in number, size and location as the
terminals on the old alternator. Finally, look at
the identification markings - they will be
stamped in the housing, or printed on a tag or
plaque affixed to the housing. Make sure that
these numbers are the same on both
alternators.
8Many new/rebuilt alternators do not have a
pulley installed, so you may have to switch the
pulley from the old unit to the new/rebuilt one.
When buying an alternator, ask about the
installation of pulleys - some auto-electrical
specialists will perform this service free of
charge.
9Refitting is the reverse of the removal
procedure, referring where necessary to the
relevant Chapters of this manual. Tighten all
fasteners to the specified torque wrench
settings.
10Check the charging voltage to verify
proper operation of the alternator (see Sec-
tion 11).
Note:This procedure assumes that
replacement parts of the correct type have
been obtained. At the time of writing, no
individual alternator components were
available as separate replacement Ford parts.
An auto electrical specialist should be able to
supply parts such as brushes.
The following procedure is for the Bosch
unit fitted to the project vehicle - details may
vary for other alternator types.
1Remove the alternator from the vehicle (see
Section 12) and place it on a clean
workbench.
2Remove the three screws, and withdraw the
plastic end cover (see illustration).3Remove the two voltage regulator/brush
holder mounting screws.
4Remove the regulator/brush holder from the
end frame (see illustration). If you are
renewing the assembly, proceed to para-
graph 8, install the new unit, reassemble the
alternator, and refit it to the engine (see
Section 12). If you are going to check the
brushes, proceed to the next paragraph.
5Measure the exposed length of each brush,
and compare it to the minimum length listed in
this Chapter’s Specifications. If the length of
either brush is less than the specified
minimum, renew the assembly.
6Make sure that each brush moves smoothly
in the brush holder.
7Check that the slip rings - the ring of
copper on which each brush bears - are
clean. Wipe them with a solvent-moistened
cloth; if either appears scored or blackened,
take the alternator to a repair specialist for
advice.
8Refit the voltage regulator/brush holder,
ensuring that the brushes bear correctly on
the slip rings, and that they compress into
their holders. Tighten the screws securely.
9Install the rear cover, and tighten the
screws securely.
10Refit the alternator (see Section 12).
General information
The sole function of the starting system is
to turn over the engine quickly enough to
allow it to start.
The starting system consists of the battery,
the starter motor, the starter solenoid, and the
wires connecting them. The solenoid is
mounted directly on the starter motor.
The solenoid/starter motor assembly is
installed on the rear upper part of the engine,
next to the transmission bellhousing.
When the ignition key is turned to position
“III”, the starter solenoid is actuated through
the starter control circuit. The starter solenoid
then connects the battery to the starter. The
battery supplies the electrical energy to thestarter motor, which does the actual work of
cranking the engine.
The starter motor on a vehicle equipped
with automatic transmission can be operated
only when the selector lever is in Park or
Neutral (“P” or “N”).
If the alarm system is armed or activated,
the starter motor cannot be operated. The
same applies with the engine immobiliser
system (where fitted).
Precautions
Always observe the following precautions
when working on the starting system:
(a) Excessive cranking of the starter motor
can overheat it, and cause serious
damage. Never operate the starter motor
for more than 15 seconds at a time
without pausing to allow it to cool for at
least two minutes. Excessive starter
operation will also risk unburned fuel
collecting in the catalytic converter’s
element, causing it to overheat when the
engine does start (see Chapter 6).
(b) The starter is connected directly to the
battery, and could arc or cause a fire if
mishandled, overloaded or shorted-out.
(c) Always detach the lead from the negative
terminal of the battery before working on
the starting system (see Section 1).
Note:Before diagnosing starter problems,
make sure that the battery is fully-charged,
and ensure that the alarm/engine immobiliser
system is not activated.
1If the starter motor does not turn at all when
the switch is operated, make sure that, on
automatic transmission models, the selector
lever is in Park or Neutral (“P” or “N”).
2Make sure that the battery is fully-charged,
and that all leads, both at the battery and
starter solenoid terminals, are clean and
secure.
3If the starter motor spins but the engine is
not cranking, the overrunning clutch or (when
applicable) the reduction gears in the starter
motor may be slipping, in which case the
15 Starting system - testing
14 Starting system - general
information and precautions
13 Alternator brushes and
voltage regulator - renewal
5•6 Engine electrical systems
12.6 Alternator must be withdrawn
through right-hand front wheel arch13.2 Renewing voltage regulator/brush
holder - Bosch alternator. Remove three
screws and withdraw end cover . . .13.4 . . . then remove regulator/brush
holder assembly (secured by two screws)
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