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Home >> Toyota >> 2006 >> Prius >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission >> Electronic Shift Lever System >> "P" Position Switch Indicator Light Circuit >> Inspection Procedure

Inspection Procedure

  1. CHECK INDICATOR LIGHT 
    1. Inspect the indicator light condition by operating the P position switch.

      Result 

      RESULT REFERENCE

      Condition Proceed to
      Indicator light does not go off. A
      Indicator light does not come on. B

    B : Go to step   3 

    A : GO TO NEXT STEP 

  2. CHECK WIRE HARNESS (TRANSMISSION CONTROL ECU - P POSITION SWITCH) 
    1. Disconnect the T4 ECU connector.
    2. Disconnect the M11 switch connector.
    3. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      T4-9 (IND) - Body ground 10 kΩ or higher

    NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

    Fig 1: Identifying Transmission Control ECU Connector Terminal
    G04474089Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : REPLACE TRANSMISSION CONTROL ECU 

  3. INSPECT FUSE (P CON MAIN) 
    1. Remove the P CON MAIN fuse from the engine room relay block.
    2. Measure the resistance of the fuse.

      Standard resistance: Below 1 Ω 

    NG : INSPECT FOR SHORT IN ALL COMPONENTS CONNECTED TO FUSE AND REPAIR OR REPLACE THEM IF NEEDED, AND REPLACE FUSE 

    Fig 2: Identifying P CON MAIN Fuse
    G04474090Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : GO TO NEXT STEP 

  4. CHECK WIRE HARNESS (TRANSMISSION CONTROL ECU - BATTERY) 
    1. Disconnect the T4 ECU connector.
    2. Measure the voltage of the wire harness side connector.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      T4-9 (IND) - Body ground 9 to 14 V

    OK : REPLACE TRANSMISSION CONTROL ECU 

    Fig 3: Identifying Transmission Control ECU Connector Terminal
    G04474091Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG : GO TO NEXT STEP 

  5. CHECK WIRE HARNESS (TRANSMISSION CONTROL ECU - P POSITION SWITCH) 
    1. Disconnect the T4 ECU connector.
    2. Disconnect the M11 switch connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      T4-9 (IND) - M11-6 Below 1 Ω

    NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

    Fig 4: Identifying Transmission Control ECU And P Position Switch Connector Terminal
    G04474092Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : GO TO NEXT STEP 

  6. CHECK WIRE HARNESS (P POSITION SWITCH - BATTERY) 
    1. Disconnect the M11 switch connector.
    2. Measure the voltage of the wire harness side connector.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      M11-5 - Body ground 9 to 14 V

    OK : REPLACE P POSITION SWITCH 

    Fig 5: Identifying P Position Switch Connector
    G04474093Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

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