Nissan Almera Tino V10. Manual — part 621
EC-1310
[YD (WITHOUT EURO-OBD)]
MAIN POWER SUPPLY AND GROUND CIRCUIT
MAIN POWER SUPPLY AND GROUND CIRCUIT
PFP:24110
ECM Terminals and Reference Value
EBS014T6
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)
1
2
3
B
B
B
ECM ground
[Engine is running]
●
Idle speed
Approximately 0V
105
113
G
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
ignition switch OFF
BATTERY VOLTAGE
(11 - 14V)
107
108
W/R
W/R
Ignition switch
[Ignition switch ON]
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)
MAIN POWER SUPPLY AND GROUND CIRCUIT
EC-1311
[YD (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Wiring Diagram
EBS014T7
MBWA0653E
EC-1312
[YD (WITHOUT EURO-OBD)]
MAIN POWER SUPPLY AND GROUND CIRCUIT
Diagnostic Procedure
EBS014T8
1.
INSPECTION START
Start engine.
Is engine running?
Yes or No
Yes
>> GO TO 7.
No
>> GO TO 2.
2.
CHECK ECM POWER SUPPLY CIRCUIT-I
1.
Turn ignition switch OFF, wait at least 10 seconds and then turn 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 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 body ground screw. Refer to
.
OK or NG
OK
>> GO TO 5.
NG
>> Repair or replace ground connection.
Voltage: Battery voltage
MBIB0610E
MBIB0915E
MAIN POWER SUPPLY AND GROUND CIRCUIT
EC-1313
[YD (WITHOUT 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.
Disconnect ECM harness connector.
2.
Check harness continuity between ECM terminals 1, 2, 3, 114 and body ground.
Refer to Wiring Diagram.
3.
Also check harness for short to power.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 6.
6.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors M71, F45
●
Harness for open or short between ECM and body ground
>> Repair open circuit or short to power in harness or connectors.
7.
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 13.
NG (Battery voltage does not exist)>>GO TO 8.
NG (Battery voltage exists for more then a few seconds)>>GO TO
10.
Continuity should exist.
Voltage:
After turning ignition switch OFF, battery
voltage will exist for a few seconds, then
drop to approximately 0V.
MBIB0611E
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