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Home >> Toyota >> 2016 >> Highlander Hybrid Limited >> Repair and Diagnosis >> Suspension >> Wheels & Tire System >> Tire Pressure Warning System - Diagnostic Codes & Circuit Tests - (Hybrid) >> Tire Pressure Warning System >> Circuit Tests >> TC and CG Terminal Circuit [11/2016 - ] >> Procedure

TC and CG Terminal Circuit [11/2016 - ]: Procedure

  1. CHECK CAN COMMUNICATION SYSTEM 
    1. Check for DTCs.

      Refer to DIAGNOSIS SYSTEM [11/2016 - ]

      Result Proceed to
      DTCs are not output. A
      DTCs are output. B

    Result: 

    GO TO CAN COMMUNICATION SYSTEM. 

    Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2016 - ] 

    Result: 

    See step  2

  2. CHECK DTC (C2179/79) 
    1. Check if DTC C2179/79 is output.

      Refer to DTC CHECK / CLEAR [02/2014 - ]

      Result Proceed to
      DTC C2179/79 is not output. A
      DTC C2179/79 is output. B

    Result: 

    GO TO DTC C2179/79. 

    Refer to  DTC C2179/79: Tire Pressure Monitor ECU Communication Stop [02/2014 - ]  

    Result: 

    See step  3

  3. INSPECT DLC3 
    1. Turn the power switch on (IG).
      GTY423328Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of DLC3
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      F25-13 (TC) - F25-4 (CG) Power switch on (IG) 11 to 14 V
      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  5

    Result: 

    OK 

    See step  4

  4. REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 
    1. Turn the power switch off.
      GTY423328Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of DLC3
    2. Replace the hybrid vehicle control ECU assembly.

      Refer to REMOVAL [11/2016 - ]

    3. Using SST, connect terminals TC and CG of the DLC3.
      • SST: 09843-18040 
    4. Check that the tire pressure warning light is blinking.

      OK

      The tire pressure warning light is blinking.

      HINT: 

      If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part.

      Refer to PROBLEM SYMPTOMS TABLE [02/2014 - ]

      Proceed to
      OK
      NG

    Result: 

    OK 

    END 

    Result: 

    NG 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. 

    Refer to  PROBLEM SYMPTOMS TABLE [02/2014 - ] 

  5. CHECK HARNESS AND CONNECTOR (TC of DLC3 - HYBRID VEHICLE CONTROL ECU ASSEMBLY) 
    1. Disconnect the F137 hybrid vehicle control ECU assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F25-13 (TC) - F137-28 (TC) Always Below 1 Ω
      F25-13 (TC) or F137-28 (TC) - Body ground Always 10 kΩ or higher
      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (CG of DLC3 - BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY438648Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of DLC3

      Standard Resistance

      Tester Connection Condition Specified Condition
      F25-4 (CG) - Body ground Always Below 1 Ω

      HINT: 

      If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part.

      Refer to PROBLEM SYMPTOMS TABLE [02/2014 - ]

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  7

  7. REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 
    1. Replace the power management control ECU.
      GTY423328Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of DLC3

      Refer to REMOVAL [11/2016 - ]

    2. Using SST, connect terminals TC and CG of the DLC3.
      • SST: 09843-18040 
    3. Check that the tire pressure warning light is blinking.

      OK

      The tire pressure warning light is blinking.

      HINT: 

      If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part.

      Refer to PROBLEM SYMPTOMS TABLE [02/2014 - ]

      Proceed to
      OK
      NG

    Result: 

    OK 

    END 

    Result: 

    NG 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. 

    Refer to  PROBLEM SYMPTOMS TABLE [02/2014 - ]