Nissan Primera P11. Manual — part 137
2
CHECK POWER SUPPLY-I
1. Turn ignition switch “OFF” and then “ON”.
2. Check voltage between ECM terminal 43 and ground with CONSULT-II or tester.
SEF981W
Voltage: Battery voltage
OK or NG
OK
©
GO TO 9.
NG
©
GO TO 3.
3
DETECT MALFUNCTIONING PART
Check the following.
I
10A Fuse
I
40A fusible link
I
Harness connectors M50, F104
I
Harness for open or short between ECM and fuse block
I
Harness for open or short between fuse block and ignition switch
©
Repair harness or connectors.
4
CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 48, 57, 106, 108 and engine ground.
Refer to WIRING DIAGRAM.
Continuity should exist.
4. Also check harness for short to power.
OK or NG
OK
©
GO TO 5.
NG
©
Repair open circuit or short to power in harness or connectors.
TROUBLE DIAGNOSIS FOR POWER SUPPLY
QG16
I
18DE
Main Power Supply and Ground Circuit (Cont’d)
EC-105
5
CHECK POWER SUPPLY-II
1. Disconnect ECM relay.
SEF984W
2. Check voltage between ECM relay terminals 1, 6 and ground with CONSULT-II or tester.
SEF101Y
OK or NG
OK
©
GO TO 7.
NG
©
GO TO 6.
6
DETECT MALFUNCTIONING PART
Check the following.
I
10A fuse
I
15A fuse
I
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.
7
CHECK OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 31 and ECM relay terminal 2.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK
©
Go to “IGNITION SIGNAL”, EC-QG-323.
NG
©
GO TO 8.
8
DETECT MALFUNCTIONING PART
Check the harness for open or short between ECM relay and ECM.
©
Repair open circuit or short to ground or short to power in harness or connectors.
TROUBLE DIAGNOSIS FOR POWER SUPPLY
QG16
I
18DE
Main Power Supply and Ground Circuit (Cont’d)
EC-106
9
CHECK POWER SUPPLY-II
1. Stop engine.
2. Check voltage between ECM terminals 67 and ground with CONSULT-II or tester.
SEF982W
Voltage: Battery voltage
OK or NG
OK
©
GO TO 11.
NG
©
GO TO 10.
10
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors E90, F73
I
10A fuse
I
Harness for open or short between ECM and fuse
©
Repair harness or connectors.
11
CHECK POWER SUPPLY-III
1. Turn ignition switch “ON” and then “OFF”.
2. Check voltage between ECM terminals 110, 112 and ground with CONSULT-II or tester.
SEF983W
Voltage:
After turning ignition switch “OFF”, battery voltage will exist for a few seconds, then drop to approximately 0V.
OK or NG
OK
©
GO TO 17.
NG (Battery voltage does not
exist.)
©
GO TO 12.
NG (Battery voltage exists for
more than a few seconds.)
©
GO TO 16.
TROUBLE DIAGNOSIS FOR POWER SUPPLY
QG16
I
18DE
Main Power Supply and Ground Circuit (Cont’d)
EC-107
12
CHECK HARNESS CONTINUITY BETWEEN ECM RELAY AND ECM
1. Disconnect ECM harness connector.
2. Disconnect ECM relay.
SEF984W
3. Check harness continuity between ECM terminals 110, 112 and relay terminal 5.
Refer to wiring diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 14.
NG
©
GO TO 13.
13
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors E90, F73
I
Harness for open or short between ECM relay and ECM
©
Repair open circuit or short to ground or short to power in harness or connectors.
14
CHECK VOLTAGE BETWEEN ECM RELAY AND GROUND
Check voltage between relay terminals 1, 3 and ground with CONSULT-II or tester.
SEF985W
Voltage: Battery voltage
OK or NG
OK
©
GO TO 16.
NG
©
GO TO 15.
15
DETECT MALFUNCTIONING PART
Check the harness for open or short between ECM relay and fuse.
©
Repair harness or connectors.
TROUBLE DIAGNOSIS FOR POWER SUPPLY
QG16
I
18DE
Main Power Supply and Ground Circuit (Cont’d)
EC-108
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