RENAULT SCENIC 2008 J84 / 2.G Engine And Peripherals - Starting Charging User Guide

16A-11V1 MR-372-J84-16A000$050.mif
STARTING - CHARGING
Fault finding – Fault finding charts16A
Scénic II ph 2
ALP 2 The starter turns but does not engage
NOTESSpecial notes:
Disconnect the battery earth before handling.
Remove the starter (see MR 370, Mechanical, 16A, Starting - Charging, Starter: Removal - Refitting).
Check that the ring gear of the flywheel is in good condition.
Are the ring gear teeth damaged?
Replace the flywheel (see MR 370, Mechanical,
Engine and peripherals, Engine and cylinder
block assembly).
Check the condition of the starter (broken teeth or
worn gears).
Is the starter in good condition?
Replace the starter (see MR 370,
Mechanical, 16A, Starting - Charging,
Starter: Removal - Refitting).
Refit the starter (see MR 370, Mechanical, 16A,
Starting - Charging, Starter: Removal - Refitting).
YESNO
NO
YES

16A-12V1 MR-372-J84-16A000$050.mif
STARTING - CHARGING
Fault finding – Fault finding charts16A
Scénic II ph 2
ALP 3 The starter is noisy when starting
NOTESTest the condition of the battery (see 80A, Battery, Test 1 Battery check).
Check that the noise is actually coming from the starter.
Try to start the engine.
At what point is the noise heard?
Starting phase Just after the engine has started
Check that the starter is correctly secured.
Is the starter correctly secured?
Tighten the starter mountings (see MR 370,
Mechanical, 16A, Starting - Charging,
Starter: Removal - Refitting).
A
YES
B
NO

16A-13V1 MR-372-J84-16A000$050.mif
STARTING - CHARGING
Fault finding – Fault finding charts16A
Scénic II ph 2
ALP 3
CONTINUED 1
Remove the starter and check that the centring pin is
present. Check the condition of the pinion and carry
out a full check of the ring gear.Inhibit the engine injection (see 13B or 17B,
Interpretation of commands), activate the
starter for 2 seconds, and release the key.
Is a fault noticed?
Does the starter continue to run after the key is
released?
Fit a centring pin, or replace the
flywheel (see MR 370,
Mechanical, 10A, Flywheel:
Removal - Refitting), or replace
the starter (see MR 370,
Mechanical, 16A, Starting -
Charging, Starter: Removal -
Refitting).Starter control fault, check the entire starter
control line (see ALP1 The starter does not
work, continued 3 C).
Replace the starter (see MR 370, Mechanical, 16A,
Starting - Charging, Starter: Removal - Refitting).Make several attempts, waiting for 5 minutes
after 5 attempts (let the starter cool). If the result
is still the same after several attempts, replace
the starter (see MR 370, Mechanical, 16A,
Starting - Charging, Starter: Removal –
Refitting).
B
YES
A
YESNO
YESNO

16A-14V1 MR-372-J84-16A000$050.mif
STARTING - CHARGING
Fault finding – Fault finding charts16A
Scénic II ph 2
ALP 4The starter rotates slowly from the outset.
The rotation speed of the starter decreases rapidly.
The starter causes the warning lights on the instrument panel to
become very dim.
NOTESTest the wiring (TEST3 Wiring check).
Test the condition of the battery (see 80A, Battery, Test 1 Battery check).
If the fault is still present, replace the starter (see MR 370, Mechanical, 16A, Starting - Charging, Starter:
Removal - Refitting).

16A-15V1 MR-372-J84-16A000$060.mif
16A
Scénic II ph 2
NOTESPerform this test only after running complete fault finding on the Engine compartment
connection unit using the diagnostic tool (see 87G, Engine compartment
connection unit).
Because the Engine compartment connection unit houses the CHARGING CIRCUIT
function (sub-function: alternator) and checks the alternator via a serial connection.
CHARGING
ALTERNATOR SUPPLY TESTTEST 1
POWER FUSE AND WIRING
TEST THE CONDITION OF THE POWER FUSE AND THE CAUSE OF ITS FAULT TEST 2
WIRING HARNESS CHECKTEST 3
STARTING - CHARGING
Fault finding – Tests

16A-16V1 MR-372-J84-16A000$060.mif
STARTING - CHARGING
Fault finding – Tests16A
Scénic II ph 2
TEST 1 Alternator supply test
NOTESTest the condition of the battery (see 80A, Battery, Test 1 Battery check).
Measure the voltage at the battery terminals with the engine warm and running at idle speed for 2 minutes and
with all consumers switched off.
Voltage value?
Replace the alternator (see MR 370, Mechanical, 16A, Starting -
Charging, Alternator: Removal - Refitting).
Visually inspect the consequences (battery, corrosion, etc.).
With the engine idling, connect a current clamp to the alternator B+ wire, connection code BPDA, with all
consumers switched off.
Current < 5 ACurrent between 5 A and 35
ACurrent > 35 A
Replace the alternator (see
MR 370, Mechanical, 16A,
Starting - Charging,
Alternator: Removal -
Refitting).Keep the engine speed at
3000 rpm and still with no
consumers switched on.Check that there are no
electrical components
consuming an abnormal
amount of current.
Disconnect the fuses one by
one.
Value of measured current?
(i 1)
< 16 V
≥ 16 V
A

16A-17V1 MR-372-J84-16A000$060.mif
STARTING - CHARGING
Fault finding – Tests16A
Scénic II ph 2
TEST 1
CONTINUED
Keep the engine speed at 3000 rpm with all
consumers switched on.
Main beam headlights, de-icing, passenger
compartment ventilation.
Value of measured current? (i 2)
Compare i 1 and i 2
i 2 > i 1 + 5A i 2 < i 1 + 5A
The alternator flow rate is correctReplace the alternator (see MR 370,
Mechanical, 16A, Starting -
Charging, Alternator: Removal -
Refitting).
Stop the engine
Value of the electrical current?
> 1 A < 1 A
Replace the alternator (see
MR 370, Mechanical, 16A,
Starting - Charging,
Alternator: Removal -
Refitting).Alternator is correct.
A

16A-18V1 MR-372-J84-16A000$060.mif
STARTING - CHARGING
Fault finding – Tests16A
Scénic II ph 2
TEST 2 Test the condition of the power fuse and the cause of its fault
NOTESCheck that the engine is not blocked.
With the ignition off, measure the voltage between the negative battery terminal
and the power fuse output
Is the voltage greater than or equal to 10V?
The power fuse is correct The power fuse is faulty
With the battery disconnected, measure the resistance
between the negative battery terminal and the power fuse
output
Is the resistance
≥ 10 ΩΩ Ω Ω
?
Disconnect the alternator + terminal, then measure
the resistance between the negative battery terminal
and the power fuse outputPossible external causes:
use of a "starter charger", excessively long use of
starter (e.g.: activating the starter with the gear
engaged to move the vehicle) etc.
Is the resistance
≥ 10 Ω?
Replace the alternator (see MR 370, Mechanical, 16A, Starting - Charging,
Alternator: Removal - Refitting).
Check the wiring connecting the alternator and the
starter to the battery + terminal (see TEST 3 Wiring
check).
Is it in good condition?
YESNO
NOYES
D
NO
YES
CNO
A
YES
B

16A-19V1 MR-372-J84-16A000$060.mif
STARTING - CHARGING
Fault finding – Tests16A
Scénic II ph 2
TEST 2
CONTINUED
Replace the starter (see MR 370, Mechanical, 16A, Starting
- Charging, Starter: Removal - Refitting).
Repair the damaged wires and terminals.
If the connection is faulty and there is a repair
procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair),
repair the wiring, otherwise replace it.
Replace the "power fuse" (see MR 370, Mechanical, 80A, Battery, Battery: Removal - Refitting).
A
NO
B
YES
CD

16A-20V1 MR-372-J84-16A000$060.mif
STARTING - CHARGING
Fault finding – Tests16A
Scénic II ph 2
TEST 3 Wiring check
NOTESNone.
Check the condition of the battery terminals.
Confirm that there is no corrosion on the battery
terminals.
Check the tightness of the terminals (see MR
370, Mechanical, 80A, Battery, Battery:
Removal - Refitting).
Are the terminals and posts in good condition and
not corroded?Clean the terminals and posts or replace them, if
necessary
Check that there are no electrolyte leaks from the
battery (cracks or breakage).
Check that the mechanical mounting of the
battery is sound (see MR 370, Mechanical, 80A,
Battery, Battery: Removal - Refitting).
Is the battery in good condition?Change the battery and clean the surrounding
area on the vehicle if necessary.
(see MR 370, Mechanical, 80A, Battery,
Battery: Removal - Refitting).
Disable the engine injection (see 13B or 17B,
Interpretation of commands).
With the starter activated, measure the voltage
on connection BPDA between the + terminal of
the battery, component code 107, and the B + of
the starter, component code 163.
Is the voltage > 2 V?Repair the damaged wires and terminals. If the
connection is faulty and there is a repair
procedure (see Technical Note 6015A,
Electrical wiring repair, Wiring: Precautions
for repair), repair the wiring, otherwise replace it
NO
YES
NO
YES
YES
NO
A