2008 RENAULT SCENIC Engine And Peripherals - Starting Charging Workshop Manual

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

16A-21V1 MR-372-J84-16A000$060.mif
STARTING - CHARGING
Fault finding – Tests16A
Scénic II ph 2
TEST 3
CONTINUED
With the engine running and the main beam
headlights and heated rear screen on, measure
the voltage between the battery B+, component
code 107, and the alternator B+, component
code 103.
Is the voltage > 0.7 V?Check that all the wires connecting the battery,
the alternator and the starter are secure and in
good condition, and that all their terminals are
correctly tightened and secure.
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
With the engine running and the main beam
headlights and heated rear screen on, measure
the voltage between the negative terminal of the
battery, component code 107, and the alternator
frame, component code 103.
Is the voltage > 0.7 V?Check the earths of the engine, alternator,
chassis, gearbox, battery or starter (tightness,
condition of terminals, condition of wires).
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
The electrical circuit is in good order.
A
NO
YES
NO
YES
NO