2008 INFINITI FX35 Service Manual

fold seats coolant level brake fluid wheelbase headlight aiming wheel

Page 3817 of 3924

INFINITI FX35 2008 Service Manual
TROUBLE DIAGNOSIS FOR SYMPTOMSTF-31
< SERVICE INFORMATION >
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2. Disconnect AWD control unit harness connector.
3. Turn ignition switch “ON”. (Do not start engine.)
4

TROUBLE DIAGNOSIS FOR SYMPTOMSTF-31
< SERVICE INFORMATION >
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2. Disconnect AWD control unit harness connector.
3. Turn ignition switch “ON”. (Do not start engine.)
4. Check voltage between AWD control unit harness connector ter- minals and ground.
5. Turn ignition switch “OFF”.
6. Check voltage between AWD control unit harness connector ter- minals and ground.
OK or NG
OK >> GO TO 3.
NG >> Check the following. If any items are damaged, repair or replace damaged parts.
10A fuse [No. 12 or 21, located in the fuse block (J/B)]
Harness for short or open between battery and AWD control unit harness connector terminal 9
Harness for short or open between ignition switch and AWD control unit harness connector ter- minal 7
Ignition switch. Refer to PG-3
.
3.CHECK AWD CONTROL UNIT GROUND CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect AWD control unit harness connector.
3. Check continuity between AWD control unit harness connector M92 terminals 10, 11 and ground.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK AWD CONTROL UNIT
Check AWD control unit input/output signal. Refer to TF-20, "
AWD Control Unit Input/Output Signal Reference
Va l u e".
OK or NG
OK >> GO TO 5.
NG >> Check AWD control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
5.CHECK OUTPUT SIGNAL WITH UNIFIED METER AND A/C AMP.
With CONSULT-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “METER A/C AMP” with CONSULT-III.
Connector Terminal Voltage (Approx.)
M92 7 - Ground
Battery voltage
9 - Ground
SDIA2319E
Connector Terminal Voltage (Approx.)
M92 7 - Ground 0V
9 - Ground Battery voltage
SDIA2320E
Continuity should exist.
SDIA1883E
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Page 3818 of 3924

INFINITI FX35 2008 Service Manual
TF-32
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
3. Start the engine, and then make sure that “4WD W/L” display turns from “ON” to “OFF” after several sec-
onds.
OK or NG
OK

TF-32
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
3. Start the engine, and then make sure that “4WD W/L” display turns from “ON” to “OFF” after several sec-
onds.
OK or NG
OK >> GO TO 6.
NG >> Perform trouble diagnosis for combination meter. Refer to DI-15, "
Trouble Diagnosis".
6.SYMPTOM CHECK
Check again.
OK or NG
OK >> INSPECTION END
NG >> Replace unified meter control unit assembly. Refer to DI-23, "
Disassembly and Assembly of Com-
bination Meter".
Heavy Tight-Corner Braking Symptom Occurs When the Vehicle Is Driven and the
Steering Wheel Is Turned Fu lly to Either Side after the Engine Is Started
INFOID:0000000001327452
NOTE:
Light tight-corner braking symptom may occur depending on driving conditions. This is not malfunc-
tion.
DIAGNOSTIC PROCEDURE
1.CHECK SYSTEM FOR CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to TF-21, "
CONSULT-III Function (ALL MODE AWD/4WD)".
Is the
“CAN COMM CIRCUIT [U1000]” displayed?
YES >> Perform trouble diagnosis for CAN communication line. Refer to TF-28, "DTC U1000 CAN COMM
CIRCUIT".
NO >> GO TO 2.
2.CHECK ACCELERATOR PEDAL POSITION SIGNAL CIRCUIT
Perform self-diagnosis for ECM. Refer to EC-55, "
Emission-Related Diagnostic Information" (VQ35DE mod-
els) or EC-633, "
Emission-related Diagnostic Information" (VK45DE models).
Is any malfunction detec ted by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 3.
3.CHECK SYSTEM FOR AWD SOLENOID
Perform trouble diagnosis for AWD solenoid system. Refer to TF-25, "
DTC C1204 4WD SOLENOID".
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4.CHECK ELECTRIC CONTROLLED COUPLING
1. Turn ignition switch “OFF”.
2. Set the selector lever to “N” (neutral) position and disengage the parking brake.
3. Lift up the vehicle.
4. Rotate the rear propeller shaft by hand.
5. Hold front propeller shaft lightly.
Does front propeller shaft rotate?
YES >> Replace electric controlled coupling for mec hanical malfunction (clutch sticking etc.). Refer to TF-
40, "Disassembly and Assembly".
NO >> GO TO 5.
Monitor item Condition Display value
4WD W/L Ignition switch ON ON
Start engine (after several seconds) OFF
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Page 3819 of 3924

INFINITI FX35 2008 Service Manual
TROUBLE DIAGNOSIS FOR SYMPTOMSTF-33
< SERVICE INFORMATION >
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5.SYMPTOM CHECK
Check again.
OK or NG
OK >> INSPECTION END
NG >> GO TO 6.
6.CHECK AWD CONTROL UNIT
Check AWD

TROUBLE DIAGNOSIS FOR SYMPTOMSTF-33
< SERVICE INFORMATION >
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5.SYMPTOM CHECK
Check again.
OK or NG
OK >> INSPECTION END
NG >> GO TO 6.
6.CHECK AWD CONTROL UNIT
Check AWD control unit input/output signal. Refer to TF-20, "
AWD Control Unit Input/Output Signal Reference
Va l u e".
OK or NG
OK >> INSPECTION END
NG >> Check AWD control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
Vehicle Does Not Enter AW D Mode Even Though AWD Warn ing Lamp Turned to OFF
INFOID:0000000001327453
DIAGNOSTIC PROCEDURE
1.CHECK AWD SOLENOID
Check AWD solenoid. Refer to TF-25, "
DTC C1204 4WD SOLENOID".
OK or NG
OK >> GO TO 2.
NG >> Replace electric controlled coupling for malfunction of AWD solenoid. Refer to TF-40, "
Disassem-
bly and Assembly".
2.CHECK AWD CONTROL UNIT
Check AWD control unit input/output signal. Refer to TF-20, "
AWD Control Unit Input/Output Signal Reference
Va l u e".
OK or NG
OK >> GO TO 3.
NG >> Check AWD control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
3.SYMPTOM CHECK
Check again.
OK or NG
OK >> INSPECTION END
NG >> Replace electric controlled coupling fo r mechanical malfunction (mechanical engagement of
clutch is not possible.). Refer to TF-40, "
Disassembly and Assembly".
While Driving, AWD Warning Lamp Flashes Rapidly (When Flashing in Approx. 1
Minute and Then Turning OFF)
INFOID:0000000001327454
NOTE:
Rapid flashing: 2 times/second
This symptom protects drivetrain parts when a heavy load is applied to the electric controlled coupling and
multiple disc clutch temperature increases. Also, opt ional distribution of torque sometimes becomes rigid
before lamp flashes rapidly. Both cases are not malfunction.
When this symptom occurs, stop vehicle and allow it to idle for some times. Flashing will stop and system will
be restored.
While Driving, AWD Warning Lamp Flashes Slowly (When Continuing to Flash until
Turning Ignition Switch OFF)
INFOID:0000000001327455
NOTE:
Slow flashing: 1 time/2 seconds
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Page 3820 of 3924

INFINITI FX35 2008 Service Manual
TF-34
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
DIAGNOSTIC PROCEDURE
1.CHECK TIRE
Check the following.
Tire pressure
Wear condition
Longitudinal tire size (There is no difference b

Page 3821 of 3924

INFINITI FX35 2008 Service Manual
AWD CONTROL UNITTF-35
< SERVICE INFORMATION >
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AWD CONTROL UNIT
Removal and InstallationINFOID:0000000001327456
REMOVAL
1. Remove the dash side finisher. Refer to EI-38

Page 3822 of 3924

INFINITI FX35 2008 Service Manual
TF-36
< SERVICE INFORMATION >
FRONT OIL SEAL
FRONT OIL SEAL
Removal and InstallationINFOID:0000000001327457
REMOVAL
1. Remove the drain plug to drain the transfer fluid. Refer to TF-10, "Replacement"

Page 3823 of 3924

INFINITI FX35 2008 Service Manual
REAR OIL SEALTF-37
< SERVICE INFORMATION >
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REAR OIL SEAL
Removal and InstallationINFOID:0000000001327458
REMOVAL
1. Remove the rear propeller shaft. Refer to PR-7.
2.

Page 3824 of 3924

INFINITI FX35 2008 Service Manual
TF-38
< SERVICE INFORMATION >
REAR OIL SEAL
1. Apply ATF to rear oil seal, install it with a drift.CAUTION:
Do not reuse rear oil seal.
When installing, do not incline rear oil seal.
2. Align the

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