Nissan Pathfinder. Manual — part 531
EC-430
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
FUEL INJECTOR
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-431, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace malfunctioning fuel injector. Refer to
EM-47, "Removal and Installation"
.
5.
CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to
GI-49, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
PCS-32, "Removal and Installation"
NO
>> Repair or replace error-detected parts.
Component Inspection
INFOID:0000000009178362
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
F30
1
F19
54
Existed
2
F18
1
60
3
F41
1
54
4
F20
1
60
5
F42
1
54
6
F22
1
60
Fuel injector
ECM
Continuity
Cylinder
Connector
Terminal
Connector
Terminal
1
F30
2
F51
33
Existed
2
F18
2
44
3
F41
2
48
4
F20
2
47
5
F42
2
46
6
F22
2
45
FUEL INJECTOR
EC-431
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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
EC-432
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
FUEL PUMP
FUEL PUMP
Component Function Check
INFOID:0000000009178363
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:0000000009178364
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 11.
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.
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for power supply circuit.
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
F51
43
E16
128
Battery voltage
IPDM E/R
Ground
Voltage
Connector
Terminal
F24
69
Ground
Battery voltage
ECM
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
F51
43
F24
69
Existed
FUEL PUMP
EC-433
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
NO
>> Repair or replace error-detected parts.
4.
CHECK CONDENSER-2 POWER SUPPLY
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect condenser-2 harness connector.
4. Turn ignition switch ON.
5. Check the voltage between condenser-2 harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 5.
5.
CHECK CONDENSER-2 POWER SUPPLY CIRCUIT
1. Disconnect IPDM E/R harness connector.
2. Check the continuity between IPDM E/R harness connector and condenser-2 harness connector.
3. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Perform the trouble diagnosis for power supply circuit.
6.
CHECK CONDENSER-2 GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check the continuity between condenser-2 harness connector and ground.
3. Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair open circuit or short to power in harness or connectors.
7.
CHECK CONDENSER-2
EC-435, "Component Inspection (Condenser-2)"
.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Replace condenser-2.
8.
CHECK FUEL PUMP POWER SUPPLY CIRCUIT
1. Disconnect “fuel level sensor unit and fuel pump” harness connector.
2. Check harness continuity between IPDM E/R harness connector and “fuel level sensor unit and fuel
pump” harness connector.
Condenser-2
Ground
Voltage
Connector
Terminal
B52
1
Ground
Battery voltage should exist for 1 second
after ignition switch is turned ON.
IPDM E/R
Condenser-2
Continuity
Connector
Terminal
Connector
Terminal
E121
15
B52
1
Existed
Condenser-2
Ground
Continuity
Connector
Terminal
B52
2
Ground
Existed
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