ECU DAEWOO MATIZ 2003 Service Owners Manual

1F–278 ENGINE CONTROLS
DAEWOO M-150 BL2
MAA1F030
DIAGNOSTIC TROUBLE CODE (DTC) – P1661 MALFUNCTION INDICATOR
L A M P ( M I L ) L O W V O LTA G E
Circuit Description
When the ignition switch to ON, the Malfunction Indica-
tor Lamp (MIL) is ON steady.
When the engine cranking, the Malfunction Indicator
Lamp (MIL) is OFF after one flashing time.
If a system have some difficulties, the Malfunction Indi-
cator Lamp (MIL) is ON.
Conditions for Setting the DTC

The Malfunction Indicator Lamp (MIL) wiring harness
low voltage.
Action Taken When the DTC Sets

The Malfunction Indicator Lamp (MIL) will illuminate.

The ECM will record operating conditions at the time
the diagnostic fails. This information will be stored in
the Freeze Frame and Failure Records buffers.

A history DTC is stored.
Conditions for Clearing the MIL/DTC

The MIL will turn off after four consecutive ignition
cycles in which the diagnostic runs without a fault.
A history DTC will clear after 40 consecutive warm-up
cycles without a fault.

DTC(s) can be cleared by using the scan tool.
Diagnostic Aids
An Intermittent problem may be caused by a poor con-
nection, rubbed through wire insulation, or wire that is
broken inside the insulation.
Any circuitry, that is suspected as causing the com-
plaint, should be thoroughly checked for the following
conditions.

Backed-out terminals

Improper mating

Broken locks

Improperly formed

Damaged terminals

Poor terminals to wire connection

Physical damage to the wiring harness

ENGINE CONTROLS 1F–307
DAEWOO M-150 BL2
D102F512
Installation Procedure
1. Install in the reverse order of removal.
Install the new fuel filter into the retaining clamp.
Note the flow direction.
Connect the inlet/outlet lines. Secure the lines with
the connector lock.
Perform a leak test of the fuel filter.
D102F514
D102F513
FUEL TANK
Removal Procedure
Caution: The fuel system is under pressure. To
avoid fuel spillage and the risk of personal injury or
fire, it is necessary to relieve the fuel system pres-
sure before disconnecting the fuel lines.
1. Relieve the fuel system pressure.
Refer to “Fuel Pump” in this section.
2. Disconnect the fuel tank ventilation tube.
Disconnect the clamp (1).
Disconnect the ventilation tube (2).
3. Drain the fuel tank.
Place a pan below the fuel tank to catch the drain-
ing fuel.
Disconnect the fuel tank filter tube (1).
Drain the fuel from the fuel tank using the ventila-
tion tube joint port (2).
Disconnect the evaporative emission canister line
(3).
D12F515A
4. Remove the fuel filter. Refer to “Fuel Filter” in this
section.
5. Install the jack to remove the fuel tank.
Install the jack on the center of the fuel tank.
Remove the strap bolts (1).
Remove the straps (2).

ENGINE EXHAUST 1G–5
DAEWOO M-150 BL2
D102G503
6. Remove the front exhaust pipe and the catalytic con-
verter assembly.
a. Front exhaust pipe.
b. Catalytic converter.
7. Clean the sealing surfaces on the front exhaust pipe
flange and the exhaust manifold.
8. Check the exhaust pipe and the catalytic coverter for
holes, damage, open seams, or other deterioration
which could permit exhaust fumes to seep into the
passenger compartment.
D12G504A
25–35 Nm
25–35 Nm
Installation Procedure
1. Using the nuts and the gasket, secure the front ex-
haust pipe and the catalytic converter assembly to
the exhaust manifold.
Tighten
Tighten the nuts to 25–35 Nm (18–25 lb-ft).
a. Front exhaust pipe nut.
2. Install the front exhaust pipe and the catalytic con-
verter assembly to the front muffler pipe flange. Use
the nuts to secure the front exhaust pipe and the cat-
alytic converter assembly.
Tighten
Tighten the nuts to 25–35 Nm (18–25 lb-ft).
b. Front muffler pipe nut.
Notice : Make sure not to contact the components with
the underbody.
3. Connect the Heated Oxygen Sensor (HO2S) connec-
tor.
4. Install the floor console. Refer to Section 9G, Interior
Trim.
D102G501
PUP-UP CATALITIC CONVERTER
Removal Procedure
1. Remove the front exhaust pipe from the pup-up cata-
litic converter.

Remove the nuts (1).

Remove the gasket (2).
2. Check the gasket for damage or leak.

2E –8 TIRES AND WHEELS
DAEWOO M-150 BL2
D16A503A
90–11 0 Nm
Installation Procedure
Notice: Before installing the wheels, remove any build-
up of corrosion on the wheel mounting surface and the
brake drum or the rotor mounting surface by scraping
and brushing them with a wire brush. Installing the
wheels without good metal-to-metal contact at the
mounting surfaces can cause the wheel nuts to loosen,
which can later allow a wheel to come off while the ve-
hicle is moving. Wheel nuts must be tightened in se-
quence and to the proper torque to avoid bending the
wheel, the brake drum or the rotor.
1. Mount the wheel.
2. Install the wheel nuts in the diagonally. Do not tighten
the wheel nuts.
3. Lower the vehicle.
Tighten
Tighten the wheel nuts to 90–110 Nm (66–81 lb-ft).
ON-VEHICLE BALANCING
On-vehicle balancing will help correct vibrations due to
brake drum, rotor, and wheel cover imbalances.
Notice: Do not allow the front suspension to hang free.
When the drive axle is run at an extreme angle, extra
vibrations can occur, as well as damage to seals and
joints.
1. During on-vehicle balancing, do not remove the bal-
ance weights from the off-vehicle dynamic balance.
2. If more than 1 ounce of additional weight is required,
split the weight between the inner and the outer rim
flanges.
3. Spin the driven tire and wheel assemblies using the
engine.
OFF-VEHICLE BALANCING
Perform wheel balancing with an electronic off-vehicle
balancer. The balancer is easy to use and gives both a
static and a dynamic balance. Unlike on-vehicle balanc-
ing, the off-vehicle balancer does not correct for drum or
rotor imbalance. This drawback is overcome by its accu-
racy. Secure the wheel on the balancer with a cone
through the back side of the centerhole, not through the
wheel nut holes.
CORRECTING NON-UNIFORM TIRES
There are two ways to correct properly balanced tires
which still vibrate. One method uses an automatic
machine which loads the tire and buffs small amounts of
rubber from high spots on the outer two tread rows.
Correction by this method is usually permanent and, if it
is done properly, does not significantly affect the
appearance or the tread life of the tire. Tire truing with a
blade-type machine is not recommended because it
substantially reduces the tread life and often does not
correct the problem permanently.

4G – 2 PARKING BRAKE
DAEWOO M-150 BL2
DESCRIPTION AND OPERATION
PARKING BRAKE
This braking system uses a BRAKE warning light lo-
cated in the instrument panel cluster. When the ignition
switch is in the III position, the BRAKE warning light
should glow and go OFF when the parking brake lever is
released. Whenever the parking brake is applied and theignition switch is II, the BRAKE warning light should
glow.
When the brake is firmly applied, the parking brake
should securely hold the vehicle with ample pedal travel
remaining. Check for frayed cables, rust, etc., or any
condition that may inhibit present (or future) free move-
ment of the parking brake lever assembly.

5B–8 FIVE-SPEED MANUAL TRANSAXLE
DAEWOO M-150 BL2
DIAGNOSTIC INFORMATION AND PROCEDURE
GENERAL DIAGNOSIS
ConditionProbable CauseCorrection
Gear Slipping Out of Mesh
Worn shift fork.
Replace shift fork.

Worn synchronizer sleeve or gear.
Replace sleeve or gear.

Worn bearings on input shaft or
counter shaft.
Replace bearing.

Weakened or damaged location
spring.
Replace spring.

Loose or damaged synchronizer
spring.
Replace synchronizer spring.

Excessive back-lash of gear.
Adjust back-lash of gear.
Gear Catching
Bent or distorted shift shaft or shift
fork.
Replace shift shaft or shift fork.

Weakened or damaged
synchronizer spring.
Replace spring.
Hard Shifting
Worn synchronizer ring.
Replace synchronizer ring.

Worn synchronizer sleeve or gear.
Replace sleeve or gear.

Bent or distorted shift shaft.
Replace shift shaft.

Excessive free travel of all gears
in axial direction.
Replace gear.

Worn bearings on input shaft or
counter shaft.
Replace bearing.

Poor adjustment of clutch cable.
Adjust clutch cable.

Distorted or broken clutch disc.
Replace clutch disc.

Damaged pressure plate.
Replace pressure plate.
Noise in the Neutral Gear
Insufficient lubricant.
Supply lubricant.

Worn input shaft gear.
Replace gear.

Worn bearings on the input shaft
gears.
Replace bearing.

Worn clutch release bearing.
Replace clutch release bearing.
Noise in the All Gears
Insufficient lubricant.
Supply lubricant.

Worn bearings on input shaft or
counter shaft.
Replace bearing.

Worn input shaft or counter shaft
gear.
Replace gear.

Worn or damaged synchronizer
ring.
Replace synchronizer ring.

Worn or damaged synchronizer
sleeve.
Replace synchronizer sleeve.

Worn differential gear or bearing.
Replace gear or bearing.
Noise in the Peculiar Gear
Worn or damaged synchronizer
ring in the peculiar gear.
Replace synchronizer ring.

Worn or damaged gear in the
peculiar gear.
Replace gear.

Worn or damaged bearing in the
peculiar gear.
Replace bearing.
Leak of Lubricant
Damaged gasket, oil seal or
O-ring.
Replace gasket, oil seal or O-ing.

FIVE-SPEED MANUAL TRANSAXLE 5B–9
DAEWOO M-150 BL2
CHECKING FLUID LEVEL
Check for a leak in the area of transaxle case and seal-
ing and then check fluid level and condition after remov-
ing oil level plug.
1. Operate the engine until it comes to normal operating
temperature(Coolant temperature : 80~90°C (176~
194°F)).
2. Stall the engine and raise the vehicle.
3. Remove the oil level plug and check the fluid level.
4. The fluid should slightly flow out from the oil level plug
hole.
5. If the level is low, add the recommended fluid through
the oil level plug hole until the fluid begins to run out.
6. If the fluid is contaminated or discolored, replace it
with the recommended fluid.
7. Reinstall the oil level plug and tighten it securely.
D103B301
CHANGING FLUID
1. Operate the engine until it comes to normal operating
temperature(Coolant temperature : 80~90°C (176~
194°F)).
2. Stall the engine and raise the vehicle.
3. Drain the fluid after removing the drain plug.
4. Reinstall the drain plug and tighten it securely after
coating sealant.
5. Remove the oil level plug and replenish the fluid until
it begins to run out.
a. Oil drain plug.
b. Oil level plug.
6. Reinstall the oil level plug and tighten it securely.Fluid Specification
75W-85(GL-4)
Fluid Capacity2.1L(2.21qt)
Service intervalRefer to Owner’s Manual
CHECKING TRANSAXLE NOISE
Many noises that appear to come from the transaxle
may actually originate with other sources such as tires,
road surfaces, wheel bearings, or engine and exhaust
system.
Identify the cause of any noise before attempting to re-
pair the clutch, the transaxle, or their related linkages.
To verify suspected transaxle noises,
1. Select a smooth, level asphalt road to reduce tyre
and resonant body noise.
2. Drive the vehicle far enough to warm up all the lubri-
cants thoroughly.
3. Record the speed and the gear range of the transaxle
when the noise occurs.
4. Check for noises with the vehicle stopped, but with
the engine running.
5. Determine if the noise occurs while the vehicle oper-
ates in.

Drive – Under a light acceleration or a heavy pull.

Float – Maintaining a constant speed with a light
throttle on a level road.

Coast – With the transaxle in gear and the throttle
partly or fully closed.

All of the above.
CHECKING BEARING NOISE
Differential Side Bearing Noise
Differential side bearing noise and wheel bearing noise
can be confused easily. Since side bearings are pre-
loaded, a differential side bearing noise should not di-
minish much when the differential/transaxle is run with
the wheels off the ground.
Wheel Bearing Noise
Wheel bearings produce a rough growl or grating sound
that will continue when the vehicle is coasting and the
transaxle is in NEUTRAL. Since wheel bearings are not
pre-loaded, a wheel bearing noise should diminish con-
siderably when the wheels are off the ground.

FIVE-SPEED MANUAL TRANSAXLE 5B–11
DAEWOO M-150 BL2
D13B5031
6. Disconnect the radiator lower hose.

Remove the bolts (1).

Disconnect the radiator lower hose (2).
7. Remove crankshaft position (CKP) sensor.

Remove the bolt (3).

Disconnect the CKP sensor connector

Remove the CKP sensor.
D103B507
8. Disconnect the speedometer cable.

Loosen the nut (1).

Disconnect the cable (2).
9. Remove the vehicle speed sensor (VSS) if
equipped.

Disconnect VSS connector.

Remove the VSS.
D102E502
10. Remove the starter motor.

Remove upper two bolts that securing starter mo-
tor to transaxle.
D13B5041
11. Fix the engine assembly.

Remove the cowl panel weatherstrip.

Position the engine support fixture DW110–021
on the cowl panel and the front upper panel.

Tighten the engine fixture joint with a bolt after re-
moving exhaust manifold bolt (No.4).

POWER STEERING PUMP 6B–3
DAEWOO M-150 BL2
DIAGNOSTIC INFORMATION AND PROCEDURES
POWER STEERING PUMP
ConditionProbable CauseCorrection
Foaming, Milky
Power Steering Fluid,
Insufficient power steering fluid level.
Fill the power steering fluid
reservoir.
Low Fluid Level, and
Possible Low
Contaminated air in the power steering
fluid.
Bleed the power steering system.
Pressure

Internal leaks and overflow of the power
steering pump.
Replace the power steering pump.

Leaks of the power steering pump housing
and the soft plug.
Replace the power steering pump.
Low Pressure Due to
Steering Pump
Stuck and improperly operated power
steering pump flow control valve.
Replace the power steering pump.

Worn power steering pump seats.
Replace the power steering pump.

Scores, cracks, or breaks of the pressure
plate, the pump ring, the thrust plate, and
the rotor.
Replace the power steering pump.

Sticking of the vanes in the rotor slots.
Replace the power steering pump.

Internal leaks and overflow of the power
steering pump.
Replace the power steering pump.
Growling Noise in
Steering Pump
Restricted flow of the pump hoses and the
steering gear pipes.
Clean out the pipes and the hoses.

Replace the pipes and the hoses as
needed.

Scores, cracks, or breaks of the pressure
plate, the pump ring, the thrust plate, and
the rotor.
Replace the power steering pump.

Improperly contacted power steering hose
with the body.
Secure the pump hose in a clamp
away from the body.

Insufficient power steering fluid level.
Fill the power steering pump
reservoir.
Ratting Noise in the
Steering Pump
Contaminated air in the power steering
fluid.
Bleed the power steering system.

Improperly contacted power steering hose
with the body.
Secure the pump hose in a clamp
away from the body.

Insufficient power steering fluid level.
Fill the power steering pump
reservoir.

Improperly installed pump mounting.
Tighten the power steering pump
attachment bolts.
Swishing Noise in the
Steering Pump
Damaged power steering pump flow control
valve.
Replace the power steering pump.
Whining Noise in the
Scores of the pressure plate and the vanes.
Replace the power steering pump.
Steering Pump
Scores of the pump shaft bearing
Replace the power steering pump.

6E – 2 STEERING WHEEL AND COLUMN
DAEWOO M-150 BL2
DESCRIPTION AND OPERATION
STEERING WHEEL AND COLUMN
In addition to the steering function, the steering column
provides safety and security.
Caution: To ensure energy-absorbing action, it is
important to use only the specified screws, bolts,
and nuts, tightened to the specified torque.
The energy-absorbing column is designed to compress
in a front-end collision to lessen the chance of driver in-
jury.
The ignition switch and the lock are mounted on the col-
umn, allowing the ignition and steering operations to be
locked to inhibit theft of the car.
The column levers trigger the turn signals, the headlight
beams, and the windshield washer and wipers.
Notice: Apply a thin coat of lithium grease to all friction
points when reassembling to ensure proper operation.
The column may be easily disassembled and assembled.
D15A001A

Safety Device
A. Steering Column Upper Bracket.
B. Steering Column.
C. Steering Column Shaft.