2008 RENAULT SCENIC Engine And Peripherals - Starting Charging Workshop Manual

16A-9V1 MR-372-J84-16A000$050.mif
STARTING - CHARGING
Fault finding – Fault finding charts16A
Scénic II ph 2
ALP 1
CONTINUED 3
Check the starting request from component
645 using ET062 UCH request to UPC
(see 87G, Passenger compartment
connection unit, Fault finding -
Interpretation of statuses).
Is component 1337 receiving the request?Check for + 12 V after ignition on connection
AP10 of connector CN of component 1337.
Is there 12 V?
Check for 12 V on connection 1A of
connector MM during a request.
Is there 12 V?Supply fault on connection
AP10 of connector CN of
component 1337.
Continuity fault on connection 1A between
components 1337 and 163. 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 component 1337
C
YES
NO
D
YESNO
YESNO

16A-10V1 MR-372-J84-16A000$050.mif
STARTING - CHARGING
Fault finding – Fault finding charts16A
Scénic II ph 2
ALP 1
CONTINUED 4
Check the request from component 104
using ET239 Ignition switch position
(see 87B Passenger compartment
connection unit, Fault finding -
Interpretation of statuses).
Is component 645 receiving the request?Is the CAN network OK?
Presence of effective + after ignition feed
Check the voltage on connection D at the
input of fuse for component 260 when
starting is requested.
Is there 12 V?Run fault finding on the CAN network
Continuity fault on connection DP between components 260
and 645. 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 component 645
Check the voltage on connection D of
component 104 when starting is requested.
Is there 12 V?Replace component 104
Continuity fault on connection D between components 104 and 260. If there is a repair
method (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair) repair the wiring, otherwise replace it.
D
YES
NOYES
NO
NOYES
NO
YES

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