check engine INFINITI FX35 2004 Service Manual

TROUBLE DIAGNOSIS FOR SYSTEM
TF-27
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Revision: 2004 November 2004 FX35/FX45
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-22, "
How to Erase Self-diagnostic Results" .
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-19, "
AWD Control Unit Input/Output Signal Reference
Va l u e s" .
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.
OK or NG
OK >>INSPECTION END
NG >> Perform self-diagnosis with ABS actuator and electric unit (control unit) again. Refer to BRC-27,
"SELF-DIAGNOSIS" .
AWD SolenoidADS000T0
CONSULT-II 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 displayed in self-diagnostic results of CONSULT-II.
Monitored item [Unit] Condition Display value
ETS SOLENOID [A] Engine runningAt idle speed Approx. 0.000A
When depressing accelerator pedal Approx. 0.000 - 2.400A*

TF-28
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: 2004 November 2004 FX35/FX45
1. CHECK AWD SOLENOID SIGNAL
With CONSULT-II
1. Start engine.
2. Select “DATA MONITOR” mode for “ALL MODE AWD/4WD” with CONSULT-II.
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.
3. Check resistance between AWD control unit harness connector
terminals 1 and 2.
OK or NG
OK >> GO TO 6.
NG >> GO TO 4.
Condition Display value
Engine runningAt idle speed Approx. 0.000A
When depressing accelerator
pedalApprox. 0.000 - 2.400A*
SDIA1885E
Connector Terminal (Wire color) Voltage (Approx.)
M92 9 (G/W) - Ground Battery voltage
SDIA1884E
Connector Terminal (Wire color) Resistance (Approx.)
M92 1 (L/W) - 2 (L/OR) (Ground) 2.45 Ω
SDIA1928E

TF-30
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: 2004 November 2004 FX35/FX45
3. Check resistance between transfer assembly harness connector
F43 terminals 1 and 2.
4. If NG, replace electric controlled coupling. Refer to TF-45, "
Dis-
assembly and Assembly" .
AWD Actuator RelayADS000T1
CONSULT-II 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 CON-
SULT-II.
1. CHECK AWD SOLENOID SYSTEM
Perform self-diagnosis. Refer to TF-21, "
SELF-DIAG RESULT MODE" .
Is the
“4WD SOLENOID [C1204]” displayed?
YES >> Perform trouble diagnosis for AWD solenoid. Refer to TF-27, "AWD Solenoid" .
NO >> GO TO 2.
2. CHECK AWD ACTUATOR RELAY SIGNAL
With CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “ALL MODE AWD/4WD” with CONSULT-II.
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-19, "
AWD Control Unit Input/Output Signal Reference
Va l u e s" .
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. 1 - 2 : Approx. 2.45Ω
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 ACTUATOREngine stopped (Ignition switch: ON) OFF
Engine running ON
SDIA1897E

TROUBLE DIAGNOSIS FOR SYSTEM
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Revision: 2004 November 2004 FX35/FX45
4. CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >>INSPECTION END
NG >> Replace AWD control unit.
Engine Control SignalADS001G5
DIAGNOSTIC PROCEDURE

Check the following if “ECM SIGNAL 1 [C1210]” is displayed in self-diagnostic results of CONSULT-II.
1. CHECK DTC WITH ECM
Perform self-diagnosis with ECM. Refer to EC-54, "
Emission-Related Diagnostic Information" (VQ engine
models) or EC-704, "
Emission-related Diagnostic Information" (VK engine models).
Is any malfunction detected 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-19, "
AWD Control Unit Input/Output Signal Reference
Va l u e s" .
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. 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-54, "
Emission-Related Diagnostic Informa-
tion" (VQ engine models) or EC-704, "Emission-related Diagnostic Information" (VK engine mod-
els).
CAN Communication LineADS0018G
DIAGNOSTIC PROCEDURE

Check the following if “CAN COMM CIRCUIT [U1000]” is detected in self-diagnostic results of CONSULT-
II.
1. CHECK CAN COMMUNICATION CIRCUIT
With CONSULT-II
1. Turn ignition switch “ON” and start engine.
2. Select “SELF-DIAG RESULTS” mode for “ALL MODE AWD/4WD” with in CONSULT-II.
3. Perform the self-diagnosis.
Is the
“CAN COMM CIRCUIT [U1000]” displayed?
YES >> Go to LAN-4, "Precautions When Using CONSULT-II" .
NO >>INSPECTION END
SDIA1850E

TF-32
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2004 November 2004 FX35/FX45
TROUBLE DIAGNOSIS FOR SYMPTOMSPFP:00007
AWD Warning Lamp Does Not Turn ON When The Ignition Switch Is Turned To
ON
ADS000TW
DIAGNOSTIC PROCEDURE
1. CHECK SYSTEM FOR CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to TF-21, "
SELF-DIAG RESULT MODE" .
Is the
“CAN COMM CIRCUIT [U1000]” displayed?
YES >> Perform trouble diagnoses for CAN communication line. Refer to TF-31, "CAN Communication
Line" .
NO >> GO TO 2.
2. CHECK AWD CONTROL UNIT
Check AWD control unit input/output signal. Refer to TF-19, "
AWD Control Unit Input/Output Signal Reference
Va l u e s" .
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. CHECK OUTPUT SIGNAL WITH UNIFIED METER AND A/C AMP.
With CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “METER A/C AMP” with CONSULT-II.
3. Start the engine, and then make sure that “4WD W/L” display
turns from "ON" to "OFF" after several seconds.
OK or NG
OK >> GO TO 4.
NG >> Perform trouble diagnoses for combination meter. Refer
to DI-13, "
How to Proceed With Trouble Diagnosis" .
4. CHECK SYMPTOM
Check again.
OK or NG
OK >>INSPECTION END
NG >> Replace unified meter control unit assembly. Refer to DI-26, "
Disassembly and Assembly for
Combination Meter" .
AWD Warning Lamp Does Not Turn OFF Several Seconds After Engine StartedADS000TX
DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to TF-21, "
SELF-DIAG RESULT MODE" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 2.
Monitor item Condition Display value
4WD W/LIgnition switch ON ON
Start engine (after several seconds) OFF
SDIA2065E

TROUBLE DIAGNOSIS FOR SYMPTOMS
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Revision: 2004 November 2004 FX35/FX45
2. CHECK AWD CONTROL UNIT POWER SUPPLY CIRCUIT
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-
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, "POWER SUPPLY ROUTING CIRCUIT" .
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 (B), 11 (B) 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.
Connector Terminal (Wire color) Voltage (Approx.)
M927 (G/R) - Ground
Battery voltage
9 (G/W) - Ground
SDIA2319E
Connector Terminal (Wire color) Voltage (Approx.)
M927 (G/R) - Ground 0V
9 (G/W) - Ground Battery voltage
SDIA2320E
Continuity should exist.
SDIA1883E

TF-34
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2004 November 2004 FX35/FX45
4. CHECK AWD CONTROL UNIT
Check AWD control unit input/output signal. Refer to TF-19, "
AWD Control Unit Input/Output Signal Reference
Va l u e s" .
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-II
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “METER A/C AMP” with CONSULT-II.
3. Start the engine, and then make sure that “4WD W/L” display
turns from "ON" to "OFF" after several seconds.
OK or NG
OK >> GO TO 6.
NG >> Perform trouble diagnoses for combination meter. Refer
to DI-13, "
How to Proceed With Trouble Diagnosis" .
6. CHECK SYMPTOM
Check again.
OK or NG
OK >>INSPECTION END
NG >> Replace unified meter control unit assembly. Refer to DI-26, "
Disassembly and Assembly for
Combination Meter" .
Heavy Tight-corner Braking Symptom Occurs When The Vehicle Is Driven And
The Steering Wheel Is Turned Fully To Either Side After The Engine Is Started
ADS000TZ
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, "
SELF-DIAG RESULT MODE" .
Is the
“CAN COMM CIRCUIT [U1000]” displayed?
YES >> Perform trouble diagnoses for CAN communication line. Refer to TF-31, "CAN Communication
Line" .
NO >> GO TO 2.
2. CHECK ACCELERATOR PEDAL POSITION SIGNAL CIRCUIT
Perform self-diagnosis for ECM. Refer to EC-54, "
Emission-Related Diagnostic Information" (VQ35DE mod-
els) or EC-704, "
Emission-related Diagnostic Information" (VK45DE models).
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 3.
Monitor item Condition Display value
4WD W/LIgnition switch ON ON
Start engine (after several seconds) OFF
SDIA2065E

TF-36
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2004 November 2004 FX35/FX45
3. CHECK SYMPTOM
Check again.
OK or NG
OK >>INSPECTION END
NG >> Replace electric controlled coupling for mechanical malfunction (mechanical engagement of
clutch is not possible.). Refer to TF-45, "
Disassembly and Assembly" .
While Driving, AWD Warning Lamp Flashes Rapidly (When Flashing In Approx.
1 Minute And Then Turning OFF)
ADS000U1
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, optional 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)
ADS000U2
NOTE:
Slow flashing: 1 time/2 seconds
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 (20 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-II
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-II.
4. Check monitor “DIS-TIRE MONI”.
Display of
“DIS-TIRE MONI”
“0-4mm”>>INSPECTION END
Except for “0-4mm”>>GO TO 3.
SDIA1900E

TRANSFER ASSEMBLY
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Revision: 2004 November 2004 FX35/FX45
TRANSFER ASSEMBLYPFP:33100
Removal and InstallationADS000RS
REMOVAL
1. Remove tunnel stay. Refer to RSU-17, "REAR SUSPENSION MEMBER" .
2. Remove exhaust front tube. Refer to EX-3, "
EXHAUST SYSTEM" .
3. Remove front and rear propeller shaft. Refer to PR-4, "
FRONT PROPELLER SHAFT" and PR-6, "REAR
PROPELLER SHAFT" .
4. Disconnect transfer assembly harness connector and separate harness from transfer assembly.
5. Remove air breather hose. Refer to TF-42, "
AIR BREATHER HOSE" .
6. Support transfer assembly with a jack.
7. Remove engine rear mounting. Refer to EM-110, "
ENGINE ASSEMBLY" (VQ35DE) or EM-236, "ENGINE
ASSEMBLY" (VK45DE).
8. Remove transfer mounting bolts and separate 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
mounting bolts following the standard below.

After the installation, check the fluid level and for fluid leakage.
Refer to TF-8, "
Inspection" .
Bolt No. 1234
Quantity 4 3 2 1
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