DYNAMIC TORQUE CONTROL 4WD/AWD SYSTEM 4WD Control Switch Circuit

DESCRIPTION

The 4WD ECU assembly changes the control mode in response to "Auto Mode" and "Lock Mode" signals from the 4WD/AWD lock switch (differential lock switch).

WIRING DIAGRAM

*1	4WD/AWD Lock Switch (Differential Lock Switch)
*2	4WD ECU Assembly

CAUTION / NOTICE / HINT

PROCEDURE

1. INSPECT DIFFERENTIAL LOCK SWITCH

   
   

   1. Remove the 4WD/AWD lock switch (differential lock switch).

      Click here

   2. Inspect the 4WD/AWD lock switch (differential lock switch).

      Click here

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE DIFFERENTIAL LOCK SWITCH Click here

   OK

2. CHECK HARNESS AND CONNECTOR (DIFFERENTIAL LOCK SWITCH - BODY GROUND)

   
   
   1. 

      *a	Front view of wire harness connector (to 4WD/AWD Lock Switch [Differential Lock Switch])

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition G50-6 - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. CHECK HARNESS AND CONNECTOR (DIFFERENTIAL LOCK SWITCH - 4WD ECU ASSEMBLY)

   
   

   1. Reinstall the 4WD/AWD lock switch (differential lock switch).

   2. Disconnect the 4WD ECU assembly connector.

   3. 

      *a	Front view of wire harness connector (to 4WD ECU Assembly)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Switch Condition Specified Condition G86-10 (4WDS) - Body ground 4WD/AWD lock switch on (Push) Below 1 Ω 4WD/AWD lock switch off (Release) 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE 4WD ECU ASSEMBLY Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR