AUTOMATIC TRANSMISSION SYSTEM (for 3UR-FE) L4 Position Switch Circuit

DESCRIPTION

The four wheel drive control ECU judges whether the transfer is in L4 based on the information from the limit switch inside the transfer shift actuator assembly which is detected by the ECM. The four wheel drive control ECU inputs a signal to the combination meter assembly via CAN communication and turns on the 4LO indicator when the transfer is in L4.

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   CHECK HARNESS AND CONNECTOR (FOUR WHEEL DRIVE CONTROL ECU - BODY GROUND)

   
   
   1. 

      Disconnect the four wheel drive control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition A27-21 (L4) - Body ground Always 10 kΩ or higher

      Table 1. Text in Illustration

      *a	Front view of wire harness connector (to Four Wheel Drive control ECU)

   
   
   • OKClick here
   • NGClick here
2. Click here

   CHECK HARNESS AND CONNECTOR (FOUR WHEEL DRIVE CONTROL ECU - ECM)

   
   
   1. 

      Disconnect the A38 ECM connector.

   2. Disconnect the four wheel drive control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition A38-21 (L4) - Body ground Always 10 kΩ or higher

      Table 2. Text in Illustration

      *a	Front view of wire harness connector (to ECM)

   
   
   • OKClick here
   • NGClick here
3. Click here

   REPLACE ECMClick here

4. Click here

   GO TO TRANSFER SYSTEM (INSPECTION)Click here

5. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR