Nissan Almera Tino V10. Manual — part 522
EC-914
[QG (WITHOUT EURO-OBD)]
FUEL PUMP CIRCUIT
Wiring Diagram
EBS00R3U
YEC475A
FUEL PUMP CIRCUIT
EC-915
[QG (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
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.
Diagnostic Procedure
EBS00R3V
1.
CHECK OVERALL FUNCTION
1.
Turn ignition switch “ON”.
2.
Pinch fuel feed hose with two fingers.
Fuel pressure pulsation should be felt on the fuel hose for 1
second after ignition switch is turned “ON”.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 2.
2.
CHECK FUEL PUMP RELAY POWER SUPPLY CIRCUIT
1.
Turn ignition switch “OFF”.
2.
Disconnect fuel pump relay.
3.
Turn ignition switch “ON”.
4.
Check voltage between fuel pump relay terminals 1, 5 and
ground with CONSULT-II or tester.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
113
B/P
Fuel pump relay
[Ignition switch “ON”]
●
For 1 seconds after turning ignition switch “ON”
[Engine is running]
0 - 1.0V
[Ignition switch “ON”]
●
More than 1 seconds after turning ignition switch
“ON”.
BATTERY VOLTAGE
(11 - 14V)
MBIB0114E
MBIB1001E
Voltage: Battery voltage
MBIB0191E
EC-916
[QG (WITHOUT EURO-OBD)]
FUEL PUMP CIRCUIT
3.
DETECT MALFUNCTIONING PART
Check the following.
●
Fuse block (J/B) connector B1
●
10A fuse
●
15A fuse
●
Harness for open or short between fuel pump relay and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK FUEL PUMP POWER SUPPLY AND GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch “OFF”.
2.
Disconnect fuel level sensor unit and fuel pump harness con-
nector.
3.
Check harness continuity between fuel pump relay terminal 3
and fuel level sensor unit and fuel pump terminal 5, fuel level
sensor unit and fuel pump terminal 3 and body ground.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors B36, D81
●
Harness for open or short between fuel level sensor unit and fuel pump and fuel pump relay
●
Harness for open or short between fuel level sensor unit and fuel pump and body ground
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.
CHECK FUEL PUMP RELAY OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Disconnect ECM harness connector.
2.
Check harness continuity between ECM terminal 113 and fuel pump 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 8.
NG
>> GO TO 7.
7.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors B5, M12 (LHD models)
●
Harness connectors B47, M65 (RHD models)
●
Harness for open or short between ECM and fuel pump relay
>> Repair open circuit or short to ground or short to power in harness or connectors.
Continuity should exist.
MBIB0115E
Continuity should exist.
FUEL PUMP CIRCUIT
EC-917
[QG (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
8.
CHECK FUEL PUMP RELAY
Refer to
EC-917, "Component Inspection"
.
OK or NG
OK
>> GO TO 9.
NG
>> Replace fuel pump relay.
9.
CHECK FUEL PUMP
Refer to
EC-917, "Component Inspection"
.
OK or NG
OK
>> GO TO 10.
NG
>> Replace fuel pump.
10.
CHECK INTERMITTENT INCIDENT
Refer to
EC-644, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
EBS00R3W
FUEL PUMP RELAY
Check continuity between terminals 3 and 4, 3 and 5 under the fol-
lowing conditions.
FUEL PUMP
1.
Disconnect fuel level sensor unit and fuel pump harness con-
nector.
2.
Check resistance between fuel level sensor unit and fuel pump
terminals 3 and 5.
Conditions
Terminals
Continuity
12V direct current supply
between terminals 1 and 2
3 and 4
No
3 and 5
Yes
No current supply
3 and 4
Yes
3 and 5
No
MBIB0056E
MBIB0115E
Resistance: Approximately 1.0
Ω
[at 25
°
C (77
°
F)]
PBIB0658E
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