Nissan Primera P12. Instruction — part 223
MAIN POWER SUPPLY AND GROUND CIRCUIT
EC-77
[YD (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
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M
A
EC
Wiring Diagram
EBS013JY
MBWA0642E
EC-78
[YD (WITH EURO-OBD)]
MAIN POWER SUPPLY AND GROUND CIRCUIT
Diagnostic Procedure
EBS013JZ
1.
INSPECTION START
Start engine.
Is engine running?
Yes or No
Yes
>> GO TO 6.
No
>> GO TO 2.
2.
CHECK ECM POWER SUPPLY CIRCUIT-I
1.
Turn ignition switch ON.
2.
Check voltage between ECM terminals 107, 108 and ground
with CONSULT-II or tester.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
●
Fuse block (J/B) connector M1
●
10A fuse
●
Harness connectors M77, F109
●
Harness for open or short between ECM and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten ground screws on the body. Refer to
.
OK or NG
OK
>> GO TO 5.
NG
>> Repair or replace ground connections.
Voltage: Battery voltage
MBIB0610E
MBIB0915E
MAIN POWER SUPPLY AND GROUND CIRCUIT
EC-79
[YD (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
5.
CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between ECM terminals 1, 2, 3, 114 and body ground. Refer to Wiring Diagram.
4.
Also check harness for short to power.
OK or NG
OK
>> GO TO 6.
NG
>> Repair open circuit or short to power in harness or connectors.
6.
CHECK ECM POWER SUPPLY CIRCUIT-II
1.
Reconnect ECM harness connector.
2.
Turn ignition switch ON and then OFF.
3.
Check voltage between ECM terminals 119, 120 and ground
with CONSULT-II or tester.
OK or NG
OK
>> GO TO 12.
NG (Battery voltage does not exist)>>GO TO 7.
NG (Battery voltage exists for more then a few seconds)>>GO TO 9.
7.
CHECK ECM POWER SUPPLY CIRCUIT-III
1.
Disconnect ECM relay.
2.
Check voltage between relay terminals 1, 6 and ground with
CONSULT-II or tester.
OK or NG
OK
>> GO TO 9.
NG
>> GO TO 8.
Continuity should exist.
Voltage:
After turning ignition switch OFF, battery
voltage will exist for a few seconds, then
drop to approximately 0V.
MBIB0611E
MBIB1086E
Voltage: Battery voltage
PBIB0359E
EC-80
[YD (WITH EURO-OBD)]
MAIN POWER SUPPLY AND GROUND CIRCUIT
8.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors E62, F12
●
20A fuse
●
Harness for open or short between ECM relay and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
9.
CHECK OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Disconnect ECM harness connector.
2.
Check harness continuity between ECM terminals 105, 113 and ECM relay terminal 2. Refer to Wiring
Diagram.
3.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 10.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
10.
CHECK ECM POWER SUPPLY CIRCUIT-IV
1.
Check harness continuity between ECM terminals 119, 120 and ECM relay terminal 7. Refer to Wiring
Diagram.
2.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 11.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
11.
CHECK ECM RELAY
Refer to
.
OK or NG
OK
>> GO TO 12.
NG
>> Replace ECM relay.
12.
CHECK ECM POWER SUPPLY CIRCUIT-V
Check voltage between ECM terminal 121 and ground with CON-
SULT-II or tester.
OK or NG
OK
>> GO TO 14.
NG
>> GO TO 13.
Continuity should exist.
Continuity should exist.
Voltage: Battery voltage
MBIB0026E
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