wiring RENAULT SCENIC 2008 J84 / 2.G Engine And Peripherals - Starting Charging Workshop Manual

16A-3V1 MR-372-J84-16A000$020.mif
16A
Scénic II ph 2
STARTING - CHARGING FLOWCHART:
1- Battery, component code 107,
2- Starter, component code 163,
3- Alternator, component code 103,
4- Protection and Switching Unit, component code 1337
5- UCH, component code 645.
A. "High current" wiring
B. Serial connection for communication between the alternator and the UCH
C. Starter control line
D. Multiplex network
4
5D
C 1A
2
3B
STARTING - CHARGING
Fault finding – Operating diagram

16A-6V1 MR-372-J84-16A000$050.mif
16A
Scénic II ph 2
ALP 1 The starter does not work
NOTESTest the condition of the battery (see 80A, Battery, Test 1 Battery check).
Test the condition of the power fuse (see TEST 2 Test of power fuse condition and
source of fault).
Check ET010 Starting conditions met (see 87B, Passenger compartment
connection unit, Fault finding - Interpretation of statuses).
Check that the engine is not jammed.
Check that the following terminals are correctly
tightened:
the battery,
the starter,
the engine earth,
the bodywork earth.
Are the terminals correctly tightened?
Retighten the terminals (see MR 370,
Mechanical, 80A, Battery, Battery:
Removal - Refitting).
Check that the following wires are in good condition:
the wire connecting the battery +, component code
107, to terminal B+ of the starter, component
code 163,
the wire connecting the battery - to the bodywork
earth,
the wire connecting the engine to the bodywork
earth.
Are the wires in good condition?
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 the wiring.
Try starting.
If the starter still does not turn, can a clicking noise be
heard when the starter is activated?
NO
YES
NO
YES
A
NO
B
YES
STARTING - CHARGING
Fault finding – Fault finding charts

16A-7V1 MR-372-J84-16A000$050.mif
STARTING - CHARGING
Fault finding – Fault finding charts16A
Scénic II ph 2
ALP 1
CONTINUED 1
With the ignition switched off, measure the voltage between the battery earth and the starter control terminal.
Voltage value?
While activating the starter, measure the voltage
between the battery earth and the starter control
terminal.Disconnect the starter control terminal wire and
measure the voltage on the wire of connection 1A
again.
Voltage value? Voltage value?
Replace the starter (see MR 370,
Mechanical, 16A, Starting -
Charging, Starter: Removal -
Refitting).Replace the starter (see MR 370,
Mechanical, 16A, Starting - Charging,
Starter: Removal - Refitting).
Disconnect connector MM on component 1337 and measure the voltage on connection 1A.
Voltage value?
Repair the damaged wires and terminals of
connection 1A. 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.Run complete fault finding on component 1337 (see
87G, Engine compartment connection unit).
A
< 1 VBetween 1 V and 10 V≥ 10 V
≥ 10 V< 10 V
C
≥ 10 V< 10 V
< 10 V≥ 10 V

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-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-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