Nissan Pathfinder. Manual — part 532
EC-434
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
FUEL PUMP
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Repair open circuit or short to power in harness or connectors.
9.
CHECK FUEL PUMP GROUND CIRCUIT
1. Disconnect “fuel level sensor unit and fuel pump” harness connector.
2. Check the continuity between “fuel level sensor unit and fuel pump” harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Repair open circuit or short to power in harness or connectors.
10.
CHECK FUEL PUMP
Check fuel pump. Refer to
EC-435, "Component Inspection (Fuel Pump)"
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Replace fuel pump. Refer to
FL-6, "Removal and Installation"
11.
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 (Fuel Pump)
INFOID:0000000009178365
1.
CHECK FUEL PUMP
1. Turn ignition switch OFF.
2. Disconnect “fuel level sensor unit (fuel pump)” harness connector.
3. Check resistance between “fuel level sensor unit (fuel pump)” terminals as follows.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace fuel level sensor unit, fuel filter and fuel pump assembly. Refer to
Component Inspection (Condenser-2)
INFOID:0000000009178366
1.
CHECK CONDENSER-2
1. Turn ignition switch OFF.
2. Disconnect condenser-2 harness connector.
3. Check resistance between condenser-2 terminals as per the following.
IPDM E/R
Fuel level sensor unit and fuel
pump
Continuity
Connector
Terminal
Connector
Terminal
E121
15
B72
6
Existed
Fuel level sensor unit and fuel
pump
Ground
Continuity
Connector
Terminal
B72
4
Ground
Existed
Terminals
Resistance [at 25
°C (77°F)]
4 and 6
0.2 - 5.0
Ω
FUEL PUMP
EC-435
< 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
>> INSPECTION END
NO
>> Replace condenser-2.
Terminals
Resistance
1 and 2
Above 1 M
Ω [at 25°C (77°F)]
EC-436
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
IGNITION SIGNAL
IGNITION SIGNAL
Component Function Check
INFOID:0000000009178367
1.
INSPECTION START
Turn ignition switch OFF, and restart engine.
Does the engine start?
YES-1 >> With CONSULT: GO TO 2.
YES-2 >> Without CONSULT: GO TO 3.
NO
>> Proceed to
.
2.
CHECK IGNITION SIGNAL FUNCTION
With CONSULT
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT.
2. Check that each circuit produces a momentary engine speed drop.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
3.
CHECK IGNITION SIGNAL FUNCTION
Without CONSULT
1. Let engine idle.
2. Read the voltage signal between ECM harness connector terminals with an oscilloscope.
NOTE:
The pulse cycle changes depending on rpm at idle.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
Diagnosis Procedure
INFOID:0000000009178368
1.
CHECK ECM POWER SUPPLY
1. Turn ignition switch OFF, wait at least 10 seconds and then turn it ON.
2. Check the voltage between ECM harness connector terminals.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Refer to
.
ECM
Voltage signal
+
–
Connector
Terminal
Connector
Terminal
F51
9
E16
128
10
11
13
14
15
JMBIA0035GB
ECM
Voltage
Connector
Terminal
Connector
Terminal
F51
31
E16
128
Battery voltage
IGNITION SIGNAL
EC-437
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
2.
CHECK CONDENSER-1 POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect condenser-1 harness connector.
3. Turn ignition switch ON.
4. Check the voltage between condenser-1 harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
CHECK CONDENSER-1 POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector.
3. Check the continuity between IPDM E/R harness connector and condenser-1 harness connector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> Refer to
.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
4.
CHECK CONDENSER-1 GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check the continuity between condenser-1 harness connector and ground.
3. Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair open circuit or short to power in harness or connectors.
5.
CHECK CONDENSER-1
EC-441, "Component Inspection (Condenser-1)"
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace condenser-1.
6.
CHECK IGNITION COIL POWER SUPPLY
1. Reconnect all harness connectors disconnected.
2. Disconnect ignition coil harness connector-1.
3. Turn ignition switch ON.
4. Check the voltage between ignition coil harness connector and ground.
Condenser-1
Ground
Voltage
Connector
Terminal
F21
1
Ground
Battery voltage
IPDM E/R
Condenser-1
Continuity
Connector
Terminal
Connector
Terminal
F19
55
F21
1
Existed
Condenser-1
Ground
Continuity
Connector
Terminal
F21
2
Ground
Existed
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст