check engine INFINITI FX35 2008 Service Manual

TF-24
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYSTEM
TROUBLE DIAGNOSIS FOR SYSTEM
DTC C1201 CONTROLLER FAILUREINFOID:0000000001327444
DIAGNOSTIC PROCEDURE
 Check the following if “CONTROLLER FAILURE [C1201]” is displayed in self-diagnostic results of CON-SULT-III.
1.PERFORM SELF-DIAGNOSIS
With CONSULT-III1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “SELF-DIAG RESULTS” mode fo r “ALL MODE AWD/4WD” with CONSULT-III.
3. Touch “ERASE”.
4. Turn ignition switch “OFF” and wait at least 10 seconds.
5. Perform the self-diagnosis again.
Is the
“CONTROLLER FAILURE [C1201]” displayed?
YES >> Replace AWD control unit. Refer to TF-35.
NO >> INSPECTION END
DTC C1203 ABS SYSTEMINFOID:0000000001327445
DIAGNOSTIC PROCEDURE
 Check the following if “ABS SYSTEM [C1203]” is disp layed in self-diagnostic results of CONSULT-III.
1.CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to BRC-26, "
Self-Diagnosis".
Is any malfunction detec ted by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 2.
2.CHECK DTC AFTER DRIVING
1. Turn ignition switch “OFF”.
2. Start engine and drive vehicle at 30 km/h (19 MPH) for at least 1 minute.
3. Make sure that ABS warning lamp turns OFF.
4. Perform erase self-diagnostic results. Refer to TF-21, "
CONSULT-III Function (ALL MODE AWD/4WD)".
5. Stop vehicle and turn ignition switch “OFF”.
6. Turn ignition switch “ON”.
7. Perform self-diagnosis.
Is the
“ABS SYSTEM [C1203]” displayed?
YES >> GO TO 3.
NO >> INSPECTION END
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.CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >> INSPECTION END
NG >> Perform self-diagnosis with ABS actuator and electric unit (control unit) again. Refer to BRC-26,
"Self-Diagnosis".
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

TROUBLE DIAGNOSIS FOR SYSTEMTF-25
< SERVICE INFORMATION >
CEF
G H
I
J
K L
M A
B
TF
N
O P
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
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

TROUBLE DIAGNOSIS FOR SYSTEMTF-27
< SERVICE INFORMATION >
CEF
G H
I
J
K L
M A
B
TF
N
O P
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
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

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
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

TROUBLE DIAGNOSIS FOR SYSTEMTF-29
< SERVICE INFORMATION >
CEF
G H
I
J
K L
M A
B
TF
N
O P
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
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

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
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

TROUBLE DIAGNOSIS FOR SYMPTOMSTF-31
< SERVICE INFORMATION >
CEF
G H
I
J
K L
M A
B
TF
N
O P
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
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

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
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

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.
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

TF-40
< SERVICE INFORMATION >
TRANSFER ASSEMBLY
TRANSFER ASSEMBLY
Removal and InstallationINFOID:0000000001327460
REMOVAL
1. Remove tunnel stay with power tool. Refer to RSU-6, "Removal and Installation".
2. Remove exhaust front tube with power tool. Refer to EX-3
.
3. Remove front and rear propeller shaft. Refer to PR-4
and PR-7.
4. Disconnect transfer assembly harness connector and separate harness from transfer assembly.
5. Remove air breather hose. Refer to TF-39
.
6. Support transfer assembly and transmission assembly with a jack.
7. Remove engine rear member with power tool. Refer to EM-112
(VQ35DE) or EM-237 (VK45DE).
8. Remove transfer mounting bolts and se parate transfer from transmission.
CAUTION:
Secure transfer assembly to a jack.
INSTALLATION
Note the following, and install in the reverse order of removal.
 When installing the transfer to the transmission, install the mount-
ing bolts following the standard below.
 After the installation, check the fluid level and for fluid leakage. Refer to TF-10, "
Inspection".
Disassembly and AssemblyINFOID:0000000001327461
COMPONENTS
Bolt No. 1234
Quantity 4321
Bolt length “ ” mm (in) 75 (2.95) 45 (1.77) 40 (1.57) 30 (1.18)
Tightening torque
N·m (kg-m, ft-lb) 37 (3.8, 27)
SDIA2284E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C