Nissan Primera P12. Instruction — part 306
MAIN POWER SUPPLY AND GROUND CIRCUIT
EC-409
[YD (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
MAIN POWER SUPPLY AND GROUND CIRCUIT
PFP:24110
ECM Terminals and Reference Value
EBS0153M
Remarks: Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA
(DC Voltage and Pulse Signal)
1
2
3
B
B
B
ECM ground
[Engine is running]
●
Idle speed
Approximately 0V
105
G
ECM relay (self-shutoff)
[Ignition switch ON]
[Ignition switch OFF]
●
For a few seconds after turning ignition
switch OFF
Approximately 1.2V
[Ignition switch OFF]
●
More than a few seconds after turning igni-
tion switch OFF
BATTERY VOLTAGE
(11 - 14V)
107
108
W/R
W/R
Ignition switch
[Ignition switch ON]
BATTERY VOLTAGE
(11 - 14V)
113
G
ECM relay (self-shutoff)
[Ignition switch ON]
[Ignition switch OFF]
●
For a few seconds after turning ignition
switch OFF
Approximately 1.2V
[Ignition switch OFF]
●
More than a few seconds after turning igni-
tion switch OFF
BATTERY VOLTAGE
(11 - 14V)
114
B
ECM ground
[Engine is running]
●
Idle speed
Approximately 0V
119
120
R
R
Power supply for ECM
[Ignition switch ON]
BATTERY VOLTAGE
(11 - 14V)
121
W/L
Power supply for ECM
(Back-up)
[Ignition switch OFF]
BATTERY VOLTAGE
(11 - 14V)
EC-410
[YD (WITHOUT EURO-OBD)]
MAIN POWER SUPPLY AND GROUND CIRCUIT
Wiring Diagram
EBS0153N
MBWA0643E
MAIN POWER SUPPLY AND GROUND CIRCUIT
EC-411
[YD (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Diagnostic Procedure
EBS0153O
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
EC-412
[YD (WITHOUT EURO-OBD)]
MAIN POWER SUPPLY AND GROUND CIRCUIT
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
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