Nissan Pathfinder. Manual — part 530
EC-426
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
ELECTRONIC CONTROLLED ENGINE MOUNT
ELECTRONIC CONTROLLED ENGINE MOUNT
Component Function Check
INFOID:0000000009178357
1.
CHECK OVERALL FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Shift selector position is D while depressing the brake pedal and parking brake pedal.
3. Disconnect electronic controlled engine mount control solenoid valve harness connector.
4. Check that body vibration increases compared to the condition of step 2 above (with vehicle stopped).
Is the inspection result normal?
YES
>> INSPECTION END
NO
>>
.
Diagnosis Procedure
INFOID:0000000009178358
1.
CHECK VACUUM SOURCE
1. Turn ignition switch OFF.
2. Reconnect electronic controlled engine mount control solenoid valve harness connector.
3. Disconnect vacuum hose connected to electronic controlled engine mount.
4. Start engine and let it idle.
5. Check vacuum hose for vacuum existence.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 2.
2.
CHECK VACUUM HOSES AND VACUUM GALLERY
1. Turn ignition switch OFF.
2. Check vacuum hoses and vacuum gallery for clogging, cracks or improper connection. Refer to
"ELECTRONIC CONTROLLED ENGINE MOUNT : System Description"
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace vacuum hoses and vacuum gallery.
3.
CHECK ELECTRONIC CONTROLLED ENGINE MOUNT CONTROL SOLENOID VALVE POWER SUPPLY
1. Disconnect electronic controlled engine mount control solenoid valve harness connector.
2. Turn ignition switch ON.
3. Check the voltage between front electronic controlled engine mount harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 4.
4.
CHECK ELECTRONIC CONTROLLED ENGINE MOUNT CONTROL SOLENOID VALVE POWER SUPPLY
CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuse block (J/B) harness connector.
3. Check the continuity between electronic controlled engine mount harness connector and fuse block (J/B)
harness connector.
Vacuum should exist.
Electronic controlled engine mount
control solenoid valve
Ground
Voltage
Connector
Terminal
F64
1
Ground
Battery voltage
ELECTRONIC CONTROLLED ENGINE MOUNT
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.
5.
CHECK ELECTRONIC CONTROLLED ENGINE MOUNT CONTROL SOLENOID VALVE OUTPUT SIG-
NAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check the continuity between ECM harness connector and electronic controlled engine mount control
solenoid valve harness connector.
3. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair open circuit, short to ground or short to power in harness connectors.
6.
CHECK ELECTRONIC CONTROLLED ENGINE MOUNT CONTROL SOLENOID VALVE
Check electronic controlled engine mount control solenoid valve. Refer to
EC-428, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Replace electronic controlled engine mount control solenoid valve. Refer to
CONTROL SYSTEM : Component Parts Location"
.
7.
CHECK ELECTRONIC CONTROLLED ENGINE MOUNT
1. Turn ignition switch OFF.
2. Install vacuum pump (A) to electronic controlled engine mount
.
3. Check that a vacuum is maintained when applying the vacuum
of -40 kPa (-0.41 kg/cm
2
, -5.8 psi) to electronic controlled engine
mount.
4. Also visually check electronic controlled engine mount.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Replace electronic controlled engine mount.
8.
CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to
GI-49, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace intake manifold collector. Refer to
EM-26, "Removal and Installation"
.
NO
>> Repair or replace error-detected parts.
Component Inspection
INFOID:0000000009178359
1.
CHECK ELECTRONIC CONTROLLED ENGINE MOUNT CONTROL SOLENOID VALVE
With CONSULT
1. Turn ignition switch OFF.
Electronic controlled engine
mount control solenoid valve
Fuse block (J/B)
Continuity
Connector
Terminal
Connector
Terminal
F64
1
E28
1M
Existed
ECM
Electronic controlled engine
mount control solenoid valve
Continuity
Connector
Terminal
Connector
Terminal
F51
38
F64
2
Existed
MBIB1237E
EC-428
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
ELECTRONIC CONTROLLED ENGINE MOUNT
2. Reconnect electronic controlled engine mount control solenoid valve harness connector.
3. Disconnect vacuum hoses connected to electronic controlled engine mount control solenoid valve.
4. Turn ignition switch ON.
5. Select “ENGINE MOUNTING” in “ACTIVE TEST” mode with CONSULT.
6. Check air passage continuity and operation delay time under the
following conditions.
Without CONSULT
1. Turn ignition switch OFF.
2. Disconnect electronic controlled engine mount control solenoid
valve harness connector.
3. Disconnect vacuum hoses connected to electronic controlled engine mount control solenoid valve.
4. Check air passage continuity and operation delay time under the
following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace electronic controlled engine mount control solenoid valve. Refer to
CONTROL SYSTEM : Component Parts Location"
.
Condition
(ENGINE MOUNTING)
Air passage continuity
between
and
Air passage continuity
between
and
TRVL
Existed
Not existed
IDLE
Not existed
Existed
Condition
Air passage continuity
between
and
Air passage continuity
between
and
12 V direct current supply be-
tween terminals 1 and 2
Existed
Not existed
No supply
Not existed
Existed
JMBIA0180ZZ
PBIB2532E
FUEL INJECTOR
EC-429
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
FUEL INJECTOR
Component Function Check
INFOID:0000000009178360
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:0000000009178361
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
F30
1
Ground
Battery voltage
2
F18
1
3
F41
1
4
F20
1
5
F42
1
6
F22
1
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