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Transfer: Diagnosis Infiniti M45 III

Transfer Case 16 illustrations ~2762 words

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 7: NVH Troubleshooting Chart
Scheme 7: NVH Troubleshooting Chart

Scheme 8

Scheme 8: DRAINING
Scheme 8: DRAINING
  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. CAUTION: When draining fluid, protect exhaust tube flange with cover.
  3. Apply sealant to drain plug. Install drain plug on transfer and tighten to the specified torque. Refer to , " «COMPONENTS»(ref-239130-S31705017512006072700000) ". Use Genuine Silicone RTV or equivalent. Refer to " «RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS»(ref-239095-S40339598692006072700000) ". CAUTION: Remove old sealant adhering to mounting surfaces. Also remove any moisture, oil, or foreign material adhering to application and mounting surfaces.

Scheme 9

Scheme 9: FILLING
Scheme 9: FILLING
  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-239130-S31705017512006072700000) ". CAUTION: Do not reuse gasket.

Trouble Diagnosis Chart for Symptoms

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

SymptomConditionCheck itemReference
AWD warning lamp does not turn ON when the ignition switch is turned to ON. (AWD warning lamp check)Ignition switch: ONCAN communication lineAWD Warning Lamp Does Not Turn ON When The Ignition Switch Is Turned to ON
Unified meter and A/C amp.
Unified meter control unit
AWD warning lamp does not turn OFF several seconds after engine started.Engine runningCAN communication lineAWD Warning Lamp Does Not Turn OFF Several Seconds after Engine Started
Power supply and ground for AWD control unit
Unified meter and A/C amp.
Unified meter control unit
AWD solenoid
AWD actuator relay (integrated in AWD control unit)
Wheel sensor
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. (See NOTE.)While driving Steering wheel is turned fully to either sidesCAN communication lineHeavy 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
Accelerator pedal position signal
AWD solenoid
Mechanical malfunction of electric controlled coupling (clutch sticking etc.)
Vehicle does not enter AWD mode even though AWD warning lamp turned to OFF.While drivingCAN communication lineVehicle Does Not Enter AWD Mode Even Though AWD Warning Lamp Turned to OFF
AWD solenoid
Mechanical malfunction of electric controlled coupling (Mechanical engagement of clutch is not possible.)
While driving, AWD warning lamp flashes rapidly. (When flashing in approx. 1 minute and then turning OFF.) Rapid flashing: 2 times/secondWhile drivingProtection function is activated due to heavy load to electric controlled coupling. (AWD system is not malfunctioning. Also, optional distribution of torque sometimes becomes rigid before lamp flashes rapidly, but it is not malfunction.)While Driving, AWD Warning Lamp Flashes Rapidly (When Flashing in Approx. 1 Minute and Then Turning OFF)
While driving, AWD warning lamp flashes slowly. (When continuing to flash until turning ignition switch OFF) Slow flashing: 1 time/2 secondsWhile driving Vehicle speed: 20 km/h (12 MPH) or moreTire size is different between front and rear of vehicle.While Driving, AWD Warning Lamp Flashes Slowly (When Continuing to Flash until Turning Ignition Switch OFF)

PROBLEM SYMPTOMS CHART

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

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.

Test Item

Test itemConditionDescription
ETS S/V (Detects AWD solenoid)Vehicle stopped Engine running No DTC detectedChange command current value to AWD solenoid, and then change driving mode. (Monitor value is normal if it is within approximately +/-10% of command value.) Qu: Increase current value in increments of 0.20AQd: Decrease current value in increments of 0.20AUP: Increase current value in increments of 0.02ADOWN: Decrease current value in increments of 0.02A

TEST ITEM DESCRIPTION CHART

CAUTIONDo not continuously energize for a long time.

DIAGNOSTIC PROCEDURE

  1. Check the following if "CONTROLLER FAILURE [C1201]" is displayed in self-diagnosis results of CONSULT-II.
  1. PERFORM SELF-DIAGNOSIS

With CONSULT-II

  1. Turn ignition switch "ON". (Do not start engine.)
  2. Select "SELF-DIAG RESULTS" mode for "ALL MODE AWD/4WD" with CONSULT-II.
  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 , " AWD CONTROL UNIT ".

NO: INSPECTION END

  1. Check the following if "ABS SYSTEM [C1203]" is displayed in self-diagnosis results of CONSULT-II.
  1. 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-239121-S17817260692006072600000) ". Is any malfunction detected by self-diagnosis? YES: Check the malfunctioning system. NO: GO TO 2.
  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-diagnosis results. Refer to , " «HOW TO ERASE SELF-DIAGNOSTIC RESULTS»(ref-239130-S11352840472006072700000) ". 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
  3. CHECK AWD CONTROL UNIT Check AWD control unit input/output signal. Refer to , " «AWD CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUES»(ref-239130-S00035031392006072700000) ". 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 " «SELF-DIAGNOSIS»(ref-239121-S17817260692006072600000) ".
  1. Check the following if "4WD SOLENOID [C1204]" is displayed in self-diagnosis results of CONSULT-II.

Scheme 10

Scheme 10
Scheme 10

Scheme 11

Scheme 11
Scheme 11

Scheme 12

Scheme 12
Scheme 12

Scheme 13

Scheme 13
Scheme 13

Scheme 14

Scheme 14
Scheme 14
  1. CHECK AWD SOLENOID SIGNAL With CONSULT-II Start engine. Select "DATA MONITOR" mode for "ALL MODE AWD/4WD" with CONSULT-II. Read out the value of "ETS SOLENOID". CONDITION DISPLAY VALUE CHART Condition Display value Engine running At idle speed Approx. 0.000A When depressing accelerator pedal Approx. 0.000 - 0.500A (1) (1) 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 Turn ignition switch "OFF". Disconnect AWD control unit harness connector. Turn ignition switch "ON". (Do not start engine.) Check voltage between AWD control unit harness connector terminal9 and ground. CONNECTOR TERMINAL VOLTAGE CHART Connector Terminal Voltage (Approx.) F109 9 - Ground Battery voltage OK or NG OK: GO TO 3. NG: Check the following. If any items are damaged, repair or replace damaged parts. 10A fuse [No. 33, 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 Turn ignition switch "OFF". Disconnect AWD control unit harness connector. Check resistance between AWD control unit harness connector terminals 1 and 2. CONNECTOR TERMINAL RESISTANCE CHART Connector Terminal Resistance (Approx.) F109 1 - 2 (Ground) 2.45 ohms OK or NG OK: GO TO 6. NG: GO TO 4.
  4. CHECK AWD SOLENOID Turn ignition switch "OFF". Disconnect transfer assembly harness connector. Check resistance between transfer assembly harness connector F43 terminals 1 and 2. 1 - 2 : Approx. 2.45ohms OK or NG OK: GO TO 5. NG: AWD solenoid is malfunctioning. Replace electric controlled coupling. Refer to , " «DISASSEMBLY AND ASSEMBLY»(ref-239130-S20651729462006072700000) ".
  5. CHECK HARNESS BETWEEN AWD CONTROL UNIT AND AWD SOLENOID Turn ignition switch "OFF". Disconnect AWD control unit harness connector and transfer assembly harness connector. Check continuity between the following terminals. AWD control unit harness connector F109 terminal 1 and transfer assembly harness connector F43 terminal 1. AWD control unit harness connector F109 terminal 2 and transfer assembly harness connector F43 terminal 2. 1 - 1: Continuity should exist. 2 - 2: Continuity should exist. Also check harness for short to ground and short to power. OK or NG OK: GO TO 6. NG: Repair or replace damaged parts.
  6. CHECK AWD CONTROL UNIT Check AWD control unit input/output signal. Refer to , " «AWD CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUES»(ref-239130-S00035031392006072700000) ". OK or NG OK: GO TO 7. 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.
  7. CHECK DTCM Perform the self-diagnosis, after driving a vehicle for a while. OK or NG OK: INSPECTION END NG: Replace AWD control unit.

Scheme 15

Scheme 15: COMPONENT INSPECTION
Scheme 15: COMPONENT INSPECTION
  1. Turn ignition switch "OFF".
  2. Disconnect transfer assembly harness connector.
  3. Check resistance between transfer assembly harness connector F43 terminals 1 and 2. 1 - 2: Approx. 2.45ohms
  4. If NG, replace electric controlled coupling. Refer to , " «DISASSEMBLY AND ASSEMBLY»(ref-239130-S20651729462006072700000) ".
  1. Check the following if "4WD ACTUATOR RLY [C1205]" is displayed in self-diagnosis results of CONSULTII.

Scheme 16

Scheme 16
Scheme 16
  1. CHECK AWD SOLENOID SYSTEM Perform self-diagnosis. Refer to , " «SELF-DIAG RESULT MODE»(ref-239130-S07977950972006072700000) ". Is the "4WD SOLENOID [C1204]" displayed? YES: Perform trouble diagnosis for AWD solenoid. Refer to , " «AWD SOLENOID»(ref-239130-S16679322092006072700000) ". NO: GO TO 2.
  2. CHECK AWD ACTUATOR RELAY SIGNAL With CONSULT-II Turn ignition switch "ON". (Do not start engine.) Select "DATA MONITOR" mode for "ALL MODE AWD/4WD" with CONSULT-II. Start engine and read out ON/OFF signal of "ETS ACTUATOR". MONITOR ITEM CONDITION DISPLAY VALUE CHART Monitor item Condition Display value ETS ACTUATOR Engine stopped (Ignition switch: ON) OFF Engine running ON 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 , " «AWD CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUES»(ref-239130-S00035031392006072700000) ". 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: Replace AWD control unit.
  1. Check the following if "ECM SIGNAL 1 [C1210]" is displayed in self-diagnosis results of CONSULT-II.
  1. CHECK DTC WITH ECM Perform self-diagnosis with ECM. Refer to " «EMISSION-RELATED DIAGNOSTIC INFORMATION»(ref-239099-S04457035362006072600000) ". 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 , " «AWD CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUES»(ref-239130-S00035031392006072700000) ". 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 " «EMISSION-RELATED DIAGNOSTIC INFORMATION»(ref-239099-S04457035362006072600000) ".
  1. Check the following if "CAN COMM CIRCUIT [U1000]" is detected in self-diagnosis results of CONSULTII.
  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: Print out CONSULT-II screen and go to " PRECAUTIONS WHEN USING CONSULT-II ".

NO: INSPECTION END

Scheme 17

Scheme 17
Scheme 17

Scheme 18

Scheme 18: DIAGNOSTIC PROCEDURE
Scheme 18: DIAGNOSTIC PROCEDURE
  1. CHECK SYSTEM FOR CAN COMMUNICATION LINE Perform self-diagnosis. Refer to , " «SELF-DIAG RESULT MODE»(ref-239130-S07977950972006072700000) ". Is the "CAN COMM CIRCUIT [U1000]" displayed? YES: Perform trouble diagnosis for CAN communication line. Refer to , " «CAN COMMUNICATION LINE»(ref-239130-S41290394552006072700000) ". NO: GO TO 2.
  2. CHECK AWD CONTROL UNIT Check AWD control unit input/output signal. Refer to , " «AWD CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUES»(ref-239130-S00035031392006072700000) ". 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 Turn ignition switch "ON". (Do not start engine.) Select "DATA MONITOR" mode for "METER A/C AMP" with CONSULT-II. Start the engine, and then make sure that "4WD W/L" display turns from "ON" to "OFF" after several seconds. MONITOR ITEM CONDITION DISPLAY VALUE CHART Monitor item Condition Display value 4WD W/L Ignition switch ON ON Start engine (after several seconds) OFF OK or NG OK: GO TO 4. NG: Perform trouble diagnosis for combination meter. Refer to " «TROUBLE DIAGNOSIS»(ref-239120-S38873161952006072600000) ".
  4. SYMPTOM CHECK Check again. OK or NG OK: INSPECTION END NG: Replace unified meter control unit assembly. Refer to " «DISASSEMBLY AND ASSEMBLY OF COMBINATION METER»(ref-239120-S20577738772006072600000) ".

Scheme 19

Scheme 19: DIAGNOSTIC PROCEDURE
Scheme 19: DIAGNOSTIC PROCEDURE

Scheme 20

Scheme 20
Scheme 20

Scheme 21

Scheme 21
Scheme 21

Scheme 22

Scheme 22
Scheme 22
  1. CHECK SELF-DIAGNOSTIC RESULTS Perform self-diagnosis. Refer to , " «SELF-DIAG RESULT MODE»(ref-239130-S07977950972006072700000) ". Is any malfunction detected by self-diagnosis? YES: Check the malfunctioning system. NO: GO TO 2.
  2. CHECK AWD CONTROL UNIT POWER SUPPLY CIRCUIT Turn ignition switch "OFF". Disconnect AWD control unit harness connector. Turn ignition switch "ON". (Do not start engine.) Check voltage between AWD control unit harness connector terminals and ground. CONNECTOR TERMINAL VOLTAGE CHART Connector Terminal Voltage (Approx.) F109 7 - Ground Battery voltage 9 - Ground Turn ignition switch "OFF". Check voltage between AWD control unit harness connector terminals and ground. CONNECTOR TERMINAL VOLTAGE CHART Connector Terminal Voltage (Approx.) F109 7 - Ground 0V 9 - Ground Battery voltage OK or NG OK: GO TO 3. NG: Check the following. If any items are damaged, repair or replace damaged parts. 10A fuse [No.33, located in the fuse block (J/B)] 10A fuse [No.82, located in the IPDM E/R] 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 terminal 7 Ignition switch. Refer to " «POWER SUPPLY ROUTING CIRCUIT»(ref-239118-S13057560952006072600000) ".
  3. CHECK AWD CONTROL UNIT GROUND CIRCUIT Turn ignition switch "OFF". Disconnect AWD control unit harness connector. Check continuity between AWD control unit harness connector F109 terminals 10, 11 and ground. Continuity should exist. 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 , " «AWD CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUES»(ref-239130-S00035031392006072700000) ". 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 Turn ignition switch "ON". (Do not start engine.) Select "DATA MONITOR" mode for "METER A/C AMP" with CONSULT-II. Start the engine, and then make sure that "4WD W/L" display turns from "ON" to "OFF" after several seconds. MONITOR ITEM CONDITION DISPLAY VALUE CHART Monitor item Condition Display value 4WD W/L Ignition switch ON ON Start engine (after several seconds) OFF OK or NG OK: GO TO 6. NG: Perform trouble diagnosis for combination meter. Refer to " «TROUBLE DIAGNOSIS»(ref-239120-S38873161952006072600000) ".
  6. SYMPTOM CHECK Check again. OK or NG OK: INSPECTION END NG: Replace unified meter control unit assembly. Refer to " «DISASSEMBLY AND ASSEMBLY OF COMBINATION METER»(ref-239120-S20577738772006072600000) ".

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-239130-S07977950972006072700000) ". Is the "CAN COMM CIRCUIT [U1000]" displayed? YES: Perform trouble diagnosis for CAN communication line. Refer to , " «CAN COMMUNICATION LINE»(ref-239130-S41290394552006072700000) ". NO: GO TO 2.
  2. CHECK ACCELERATOR PEDAL POSITION SIGNAL CIRCUIT Perform self-diagnosis for ECM. Refer to " «EMISSION-RELATED DIAGNOSTIC INFORMATION»(ref-239099-S04457035362006072600000) ". 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-239130-S16679322092006072700000) ". 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-239130-S20651729462006072700000) ". 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-239130-S00035031392006072700000) ". 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 WARNING LAMP Turn ignition switch "ON". (Do not start engine.) Does AWD warning lamp turn on? YES: GO TO 2. NO: Go to , " «AWD WARNING LAMP DOES NOT TURN ON WHEN THE IGNITION SWITCH IS TURNED TO ON»(ref-239130-S41703995232006072700000) ".
  2. CHECK SYSTEM FOR CAN COMMUNICATION LINE Perform self-diagnosis. Refer to , " «SELF-DIAG RESULT MODE»(ref-239130-S07977950972006072700000) ". Is the "CAN COMM CIRCUIT [U1000]" displayed? YES: Perform trouble diagnosis for CAN communication line. Refer to , " «CAN COMMUNICATION LINE»(ref-239130-S41290394552006072700000) ". NO: GO TO 3.
  3. CHECK AWD SOLENOID Check AWD solenoid. Refer to " «COMPONENT INSPECTION»(ref-239130-S39702585422006072700000) ". OK or NG OK: GO TO 4. NG: Replace electric controlled coupling for malfunction of AWD solenoid. Refer to , " «DISASSEMBLY AND ASSEMBLY»(ref-239130-S20651729462006072700000) ".
  4. CHECK AWD CONTROL UNIT Check AWD control unit input/output signal. Refer to , " «AWD CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUES»(ref-239130-S00035031392006072700000) ". 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. 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-239130-S20651729462006072700000) ".

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