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DTC C1340: Center Differential Lock Circuit: Procedure

  1. CHECK TERMINAL VOLTAGE (EXI) 
    1. Disconnect the A7 skid control ECU connector.
    2. Measure the voltage according to the value(s) in the table below.
      GTY357140Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      STANDARD VOLTAGE

      Tester Connection Switch Condition Specified Condition
      A7-27 (EXI) - Body ground Engine switch on (IG) 11 to 14 V
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Skid Control ECU)

    NG → See step   3 

    OK: Go to next step 

  2. RECONFIRM DTC 
    1. Clear the DTCs. Refer to DTC CHECK / CLEAR [06/2012 - ] .
    2. Check for DTCs. Refer to DTC CHECK / CLEAR [06/2012 - ] .
      RESULT

      Result Proceed to
      DTC is not output A
      DTC is output B

    B → See step   4 

    A → See step   5 

  3. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - FOUR WHEEL DRIVE CONTROL ECU/TRANSFER SHIFT ACTUATOR) See step   3 

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   6 

  4. REPLACE MASTER CYLINDER SOLENOID. Refer to  DISASSEMBLY [06/2012 - ] 
  5. USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2012 - ] 
  6. GO TO TRANSFER SYSTEM (PROBLEM SYMPTOMS TABLE). Refer to  PROBLEM SYMPTOMS TABLE [06/2012 - ]