Nissan Quest E52. Instruction — part 554
EC-426
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
FUEL INJECTOR
FUEL INJECTOR
Component Function Check
INFOID:0000000009651286
1.
INSPECTION START
Turn ignition switch to START.
Are any cylinders ignited?
YES
>> GO TO 2.
NO
>> Proceed to
.
2.
CHECK FUEL INJECTOR FUNCTION
With CONSULT
1.
Start engine.
2.
Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT.
3.
Check that each circuit produces a momentary engine speed drop.
Without CONSULT
1.
Start engine.
2.
Listen to each fuel injector operating sound.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
Diagnosis Procedure
INFOID:0000000009651287
1.
CHECK FUEL INJECTOR POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect fuel injector harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between fuel injector harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect IPDM E/R harness connector.
3.
Check the continuity between fuel injector harness connector and IPDM E/R harness connector.
Clicking sound should be heard.
PBIB3332E
Fuel injector
Ground
Voltage
Cylinder
Connector
Terminal
1
F37
1
Ground
Battery voltage
2
F38
1
3
F39
1
4
F40
1
5
F41
1
6
F42
1
FUEL INJECTOR
EC-427
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for power supply circuit.
NO
>> Repair or replace error-detected parts.
3.
CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between fuel injector harness connector and ECM harness connector.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
4.
CHECK FUEL INJECTOR
Check fuel injector. Refer to
EC-427, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace malfunctioning fuel injector. Refer to
5.
CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to
GI-42, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
.
NO
>> Repair or replace error-detected parts.
Component Inspection
INFOID:0000000009651288
1.
CHECK FUEL INJECTOR
1.
Turn ignition switch OFF.
2.
Disconnect fuel injector harness connector.
Fuel injector
IPDM E/R
Continuity
Cylinder
Connector
Terminal
Connector
Terminal
1
F37
1
F12
51
Existed
2
F38
1
52
3
F39
1
51
4
F40
1
52
5
F41
1
51
6
F42
1
52
Fuel injector
ECM
Continuity
Cylinder
Connector
Terminal
Connector
Terminal
1
F37
2
F7
33
Existed
2
F38
2
44
3
F39
2
48
4
F40
2
47
5
F41
2
46
6
F42
2
45
EC-428
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
FUEL INJECTOR
3.
Check resistance between fuel injector terminals as per the fol-
lowing.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace malfunctioning fuel injector. Refer to
.
Terminals
Resistance
1 and 2
11.1 - 14.5
Ω
[at 10 - 60
°
C (50 - 140
°
F)]
PBIB1727E
FUEL PUMP
EC-429
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
FUEL PUMP
Component Function Check
INFOID:0000000009651289
1.
CHECK FUEL PUMP FUNCTION
1.
Turn ignition switch ON.
2.
Pinch fuel feed hose (
) with two fingers.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>>
.
Diagnosis Procedure
INFOID:0000000009651290
1.
CHECK FUEL PUMP RELAY POWER SUPPLY-I
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between ECM harness connector terminals.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 2.
2.
CHECK FUEL PUMP RELAY POWER SUPPLY-II
Check the voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 7.
3.
CHECK FUEL PUMP RELAY POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect IPDM E/R harness connector.
3.
Check the continuity between ECM harness connector and IPDM E/R harness connector.
: Vehicle front
Fuel pressure pulsation should be felt on the fuel feed
hose for 1 second after ignition switch is turned ON.
JMBIA1696ZZ
ECM
Voltage
+
–
Connector
Terminal
Connector
Terminal
F7
43
E16
128
Battery voltage
IPDM E/R
Ground
Voltage
Connector
Terminal
F12
77
Ground
Battery voltage
ECM
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
F7
43
F12
77
Existed
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