Diagnosis Procedure

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

1. CHECK AWD SOLENOID POWER SUPPLY (1)
   
   
   1. Turn the ignition switch OFF.
   2. Disconnect AWD control unit harness connector.
   3. Check the voltage between AWD control unit harness connector and ground.

      AWD control unit		-	Voltage
      Connector	Terminal
      B67	9	Ground	Battery voltage

   4. Turn the ignition switch ON.
      CAUTION:

      Never start the engine.

   5. Check the voltage between AWD control unit harness connector and ground.

      AWD control unit		-	Voltage
      Connector	Terminal
      B67	9	Ground	Battery voltage

   Is the inspection result normal?

   YES 

   GO TO STEP 3  .

   NO 

   GO TO STEP 2  .

2. CHECK AWD SOLENOID POWER SUPPLY (2)
   
   
   1. Turn the ignition switch OFF.
   2. Check the 10A fuse (#62)
   3. Check the harness for open or short between AWD control unit harness connector No. 9 terminal and 10A fuse (#62).

   Is the inspection result normal?

   YES 

   Perform the trouble diagnosis for power supply circuit. Refer to WIRING DIAGRAM - BATTERY POWER SUPPLY - .

   NO 

   Repair or replace error-detected parts.

3. CHECK AWD SOLENOID GROUND
   
   

   Check the continuity between AWD control unit harness connector and ground.

   AWD control unit		-	Continuity
   Connector	Terminal
   B67	10	Ground	Existed
   	11

   Is the inspection result normal?

   YES 

   GO TO STEP 4  .

   NO 

   Repair or replace error-detected parts.

4. CHECK AWD SOLENOID CIRCUIT (1)
   
   

   Check the resistance between AWD control unit harness connector.

   AWD control unit			Resistance (Approx.)
   Connector	Terminal
   B67	1	2	2.45 Ω

   Is the inspection result normal?

   YES 

   GO TO STEP 7  .

   NO 

   GO TO STEP 5  .

5. CHECK AWD SOLENOID CIRCUIT (2)
   
   
   1. Remove AWD solenoid harness connector.
   2. Check the continuity between AWD control unit harness connector and AWD solenoid harness connector.

      AWD control unit		AWD solenoid		Continuity
      Connector	Terminal	Connector	Terminal
      B67	1	C12	1	Existed
      	2		2

   3. Check the continuity between AWD control unit harness connector and the ground.

      AWD control unit		-	Continuity
      Connector	Terminal
      B67	1	Ground	Not existed
      	2

   Is the inspection result normal?

   YES 

   GO TO STEP 6  .

   NO 

   Repair or replace error-detected parts.

6. CHECK AWD SOLENOID
   
   

   Check AWD solenoid. Refer to COMPONENT INSPECTION .

   Is the inspection result normal?

   YES 

   GO TO STEP 7  .

   NO 

   AWD solenoid is malfunctioning. Replace electric controlled coupling. Refer to REMOVAL AND INSTALLATION .

7. CHECK TERMINALS AND HARNESS CONNECTORS
   
   
   • Check AWD control unit pin terminals for damage or loose connection with harness connector.
   • Check AWD solenoid pin terminals for damage or loose connection with harness connector.

   Is the inspection result normal?

   YES 

   Replace AWD control unit. Refer to REMOVAL AND INSTALLATION .

   NO 

   Repair or replace error-detected parts.