Transfer: Diagnosis Infiniti FX45 I

WIRING DIAGRAMS AND TROUBLE DIAGNOSIS

When reading wiring diagrams, refer to the following

1. «HOW TO READ WIRING DIAGRAMS»(ref-178916-S01218666472005062500000)

When performing trouble diagnosis, refer to the following

1. «HOW TO FOLLOW TROUBLE DIAGNOSES»(ref-178916-S17561651792005062500000) .
2. «HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT»(ref-178916-S03347571922005062500000) .

NVH TROUBLESHOOTING CHART

Use the chart below to help you find the cause of the symptom. The numbers indicate the order of the inspection. If necessary, repair or replace these parts.

Scheme 7

Scheme 8

1. Run the vehicle to warm up the transfer unit sufficiently.
2. Stop the engine, and remove the drain plug to drain the transfer fluid.
3. Apply sealant to drain plug. Install drain plug on transfer and tighten to the specified torque. Refer to «COMPONENTS»(ref-173650-S06546933482005032100000) . Use Genuine Silicone RTV or equivalent. Refer to «RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS»(ref-178916-S25420186752005062500000)

Scheme 9

1. Remove filler plug and add transfer fluid until fluid level reaches the specified limit near filler plug mounting hole. Fluid capacity : Approx. 1.25 l (2-5/8 US pt, 2-1/4 lmp pt) CAUTION: Carefully fill the fluid. (Fill up for approx. 3 minutes.)
2. Leave the vehicle for 3 minutes, and check the fluid level again.
3. Set a new gasket onto filler plug and install it on transfer and tighten to the specified torque. Refer to «COMPONENTS»(ref-173650-S06546933482005032100000) . CAUTION: Do not reuse gasket.

Scheme 10

1. Check fluid level from filler plug mounting hole as shown in the figure.
2. Before installing filler plug, set a new gasket. Install filler plug on transfer and tighten to the specified torque. Refer to «COMPONENTS»(ref-173650-S06546933482005032100000) . CAUTION: Do not reuse gasket.

Scheme 11

TROUBLE DIAGNOSIS CHART FOR SYMPTOMS

If AWD warning lamp turns ON, perform self-diagnosis. Refer to SELF-DIAG RESULT MODE .

Scheme 12

Note. Light tight-corner braking symptom may occur depending on driving conditions. This is not malfunction.

Scheme 13

Scheme 14

Scheme 15

How To Erase Self-Diagnostic Results

1. Perform applicable inspection of malfunctioning item and then repair or replace.
2. Start engine and drive at 30 km/h (19 MPH) or more for approx. 1 minute.
3. Make sure that ABS warning lamp turns OFF. NOTE: Make sure that ABS warning lamp turns OFF by driving for a minute at vehicle speed of 30 km/h (19 MPH) or more after turning ignition switch "OFF" if AWD warning lamp turns ON with system malfunction of "ABS SYSTEM [C1203]". AWD warning lamp may not turn OFF if it is normal unless ignition switch turns OFF at once and engine restarts after that.
4. Turn ignition switch "OFF" to erase memory.
5. Start engine and select "SELF-DIAG RESULTS" mode for "ALL MODE AWD/4WD" with CONSULT-II.
6. Touch "ERASE" on CONSULT-II screen to erase DTC memory. CAUTION: If memory cannot be erased, perform applicable diagnosis.
7. Drive at 30 km/h (19 MPH) or more for approx. 1 minute. Be sure AWD warning lamp is OFF.

Diagnostic Procedure

1. Check the following if "CONTROLLER FAILURE [C1201]" is displayed in self-diagnostic results of CONSULT-II. Perform Self-Diagnosis With CONSULT-II Turn ignition switch "ON". (Do not start engine.) Select "SELF-DIAG RESULTS" mode for "ALL MODE AWD/4WD" with CONSULT-II. Touch "ERASE". Turn ignition switch "OFF" and wait at least 10 seconds. Perform the self-diagnosis again. Is the "CONTROLLER FAILURE [C1201]" displayed? YES: Replace AWD control unit. Refer to «AWD CONTROL UNIT»(ref-173650-S09829875702005032100000) . NO: INSPECTION END

1. Check the following if "ABS SYSTEM [C1203]" is displayed in self-diagnostic results of CONSULT-II. Check DTC With ABS Actuator And Electric Unit (Control Unit) Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to «SELF-DIAGNOSIS»(ref-172161-S37534995472005022200000) . Is any malfunction detected by self-diagnosis? YES: Check the malfunctioning system. NO: GO TO 2 . Check DTC After Driving Turn ignition switch "OFF". Start engine and drive vehicle at 30 km/h (19 MPH) for at least 1 minute. Make sure that ABS warning lamp turns OFF. Perform erase self-diagnostic results. Refer to «HOW TO ERASE SELF-DIAGNOSTIC RESULTS»(ref-173650-S09605908712005032100000) . Stop vehicle and turn ignition switch "OFF". Turn ignition switch "ON". Perform self-diagnosis. Is the "ABS SYSTEM [C1203]" displayed? YES: GO TO 3 . NO: INSPECTION END Check AWD Control Unit Check AWD control unit input/output signal. Refer to «AWD CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUES»(ref-173650-S35225397462005032100000) . 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. 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 «SELF-DIAGNOSIS»(ref-172161-S37534995472005022200000) .

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

Note. Light tight-corner braking symptom may occur depending on driving conditions. This is not malfunction.

1. Check System For CAN Communication Line Perform self-diagnosis. Refer to «SELF-DIAG RESULT MODE»(ref-173650-S01381953722005032100000) . Is the "CAN COMM CIRCUIT [U1000]" displayed? YES: Perform trouble diagnosis for CAN communication line. Refer to «CAN COMMUNICATION LINE»(ref-173650-S12181349232005032100000) . NO: GO TO 2 .
2. Check Accelerator Pedal Position Signal Circuit Perform self-diagnosis for ECM. Refer to: «EMISSION-RELATED DIAGNOSTIC INFORMATION»(ref-179016-S28144208542005062800000) Is any malfunction detected 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 «AWD SOLENOID»(ref-173650-S39482764882005032100000) . OK or NG OK: GO TO 4 . NG: Repair or replace damaged parts.
4. Check Electric Controlled Coupling Turn ignition switch "OFF". Set the selector lever to "N" (neutral) position and disengage the parking brake. Lift up the vehicle. Rotate the rear propeller shaft by hand. Hold front propeller shaft lightly. Does front propeller shaft rotate? YES: Replace electric controlled coupling for mechanical malfunction (clutch sticking etc.). Refer to «DISASSEMBLY AND ASSEMBLY»(ref-173650-S40301768922005032100000) . NO: GO TO 5 .
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 «AWD CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUES»(ref-173650-S35225397462005032100000) . 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.

1. Check AWD Solenoid Check AWD solenoid. Refer to «COMPONENT INSPECTION»(ref-173650-S42180039972005032100000) . OK or NG OK: GO TO 2 . NG: Replace electric controlled coupling for malfunction of AWD solenoid. Refer to «DISASSEMBLY AND ASSEMBLY»(ref-173650-S40301768922005032100000) .
2. Check AWD Control Unit Check AWD control unit input/output signal. Refer to «AWD CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUES»(ref-173650-S35225397462005032100000) . 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 for mechanical malfunction (mechanical engagement of clutch is not possible.). Refer to «DISASSEMBLY AND ASSEMBLY»(ref-173650-S40301768922005032100000) .