2008 INFINITI FX35 4WD

TROUBLE DIAGNOSIS FOR SYSTEMTF-25
< SERVICE INFORMATION >
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DTC C1204 4WD SOLENOIDINFOID:0000000001327446
CONSULT-III REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
*: The values are changed by throttle opening and engine speed.
DIAGNOSTIC PROCEDURE
 Check the following if “4WD SOLENOID [C1204]” is di splayed in self-diagnostic results of CONSULT-III.
1.CHECK AWD SOLENOID SIGNAL
With CONSULT-III
1. Start engine.
2. Select “DATA MONITOR” mode for “A LL MODE AWD/4WD” with CONSULT-III.
3. Read out the value of “ETS SOLENOID”.
*: The values are changed by throttle opening and engine speed.
OK or NG
OK >> GO TO 6.
NG >> GO TO 2.
2.CHECK POWER SUPPLY
1. Turn ignition switch “OFF”.
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- minal 9 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. 21, located in the fuse block (J/B)]
 Harness for short or open between battery and AWD control unit harness connector terminal 9
3.CHECK AWD SOLENOID CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect AWD control unit harness connector.
Monitored item [Unit] Condition Display value
ETS SOLENOID [A] Engine running At idle speed Approx. 0.000A
When depressing accelerator pedal Approx. 0.000 - 2.400A*
Condition Display value
Engine running At idle speed Approx. 0.000A
When depressing accelerator
pedal
Approx. 0.000 - 2.400A*
Connector Terminal Voltage (Approx.)
M92 9 - Ground Battery voltage
SDIA1884E
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TROUBLE DIAGNOSIS FOR SYSTEMTF-27
< SERVICE INFORMATION >
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1. Turn ignition switch “OFF”.
2. Disconnect transfer assembly harness connector.
3. Check resistance between transfer assembly harness connector F43 terminals 1 and 2.
4. If NG, replace electric controlled coupling. Refer to TF-40, "
Dis-
assembly and Assembly".
DTC C1205 4WD ACTUATOR RLYINFOID:0000000001327447
CONSULT-III REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
DIAGNOSTIC PROCEDURE
 Check the following if “4WD ACTUATOR RLY [C1205]” is displayed in self-diagnostic results of CONSULT-
III.
1.CHECK AWD SOLENOID SYSTEM
Perform self-diagnosis. Refer to TF-21, "
CONSULT-III Function (ALL MODE AWD/4WD)".
Is the
“4WD SOLENOID [C1204]” displayed?
YES >> Perform trouble diagnosis for AWD solenoid. Refer to TF-25, "DTC C1204 4WD SOLENOID".
NO >> GO TO 2.
2.CHECK AWD ACTUATOR RELAY SIGNAL
With CONSULT-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “A LL MODE AWD/4WD” with CONSULT-III.
3. Start engine and read out ON/OFF signal of “ETS ACTUATOR”.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3.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 4.
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.
4.CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while. 1 - 2 : Approx. 2.45
Ω
SDIA2162E
Monitored item Condition Display value
ETS ACTUATOR [ON/OFF] Engine stopped (Ignition switch: ON) OFF
Engine running ON
Monitor item Condition Display value
ETS ACTUATOR Engine stopped (Ignition switch: ON) OFF
Engine running ON
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TF-28
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYSTEM
OK or NG
OK >>INSPECTION END
NG >> Replace AWD control unit.
DTC C1210 ENGINE SIGNAL 1INFOID:0000000001327448
DIAGNOSTIC PROCEDURE
 Check the following if “ECM SIGNAL 1 [C1210]” is di splayed in self-diagnostic results of CONSULT-III.
1.CHECK DTC WITH ECM
Perform self-diagnosis with ECM. Refer to EC-55, "
Emission-Related Diagnostic Information" (VQ engine
models) or EC-633, "
Emission-related Diagnostic Information" (VK engine models).
Is any malfunction detec ted by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 2.
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 dam age or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
3.CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >> INSPECTION END
NG >> Perform self-diagnosis with ECM again. Refer to EC-55, "
Emission-Related Diagnostic Informa-
tion" (VQ engine models) or EC-633, "Emission-related Diagnostic Information" (VK engine mod-
els).
DTC U1000 CAN COMM CIRCUITINFOID:0000000001327449
DIAGNOSTIC PROCEDURE
 Check the following if “CAN COMM CIRCUIT [U1000]” is detected in self-diagnostic results of CONSULT-III.
1.CHECK CAN COMMUNICATION CIRCUIT
With CONSULT-III
1. Turn ignition switch “ON” and start engine.
2. Select “SELF-DIAG RESULTS” mode for “ALL MODE AWD/4WD” with in CONSULT-III.
3. Perform the self-diagnosis.
Is the
“CAN COMM CIRCUIT [U1000]” displayed?
YES >> Print out CONSULT-III screen and go to LAN-43, "CAN System Specification Chart".
NO >> INSPECTION END
Power Supply Circuit for AWD Control UnitINFOID:0000000001327443
CONSULT-III REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
DIAGNOSTIC PROCEDURE
1.CHECK POWER SUPPLY
1. Turn ignition switch “OFF”.
Monitored item [Unit] Condition Display value (Approx.)
BATTERY VOLT [V] Ignition switch: ON Battery voltage
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TROUBLE DIAGNOSIS FOR SYSTEMTF-29
< 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 2.
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
.
2.CHECK 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 3.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK DTC
Start engine.
Does AWD warning lamp turn OFF?
YES >> INSPECTION END
NO >> Perform the self-diagnosis, repair or replace damaged parts. Refer to TF-21, "
CONSULT-III Func-
tion (ALL MODE AWD/4WD)".
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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TF-30
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
TROUBLE DIAGNOSIS FOR SYMPTOMS
AWD Warning Lamp Does Not Turn ON When the Ignition Switch Is Turned to ON
INFOID:0000000001327450
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 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 dam age or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
3.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.
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 4.
NG >> Perform trouble diagnosis for combination meter. Refer to DI-15, "
Trouble Diagnosis".
4.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".
AWD Warning Lamp Does Not Turn OFF Several Seconds after Engine Started
INFOID:0000000001327451
DIAGNOSTIC PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to TF-21, "
CONSULT-III Function (ALL MODE AWD/4WD)".
Is any malfunction detec ted by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 2.
2.CHECK AWD CONTROL UNIT POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
Monitor item Condition Display value
4WD W/L Ignition switch ON ON
Start engine (after several seconds) OFF
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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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TROUBLE DIAGNOSIS FOR SYMPTOMSTF-33
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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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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 between longitudinal tires.)
OK or NG
OK >> GO TO 2.
NG >> Drive at vehicle speed of 20 km/h (12 MPH) or more for 5 seconds or more after repairing or replacing damaged parts. (Initialize improper size tire information.)
2.CHECK INPUT SIGNAL OF TIRE DIAMETER
With CONSULT-III
1. Start engine.
2. Drive at 20 km/h (12 MPH) or more for approx. 200 seconds.
3. Select “DATA MONITOR” mode for “ALL MODE AWD/4WD” with CONSULT-III.
4. Check monitor “DIS-TIRE MONI”.
Display of
“DIS-TIRE MONI”
“0-4mm”>> INSPECTION END
Except for “0-4mm”>>GO TO 3.
3.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 4.
NG >> Check AWD control unit pin terminals for dam age or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
4.SYMPTOM CHECK
Check again.
OK or NG
OK >> INSPECTION END
NG >> Replace AWD control unit.
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