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Home >> Toyota >> 2016 >> Highlander Hybrid Limited >> Repair and Diagnosis >> Engine Mechanical >> Exhaust >> Exhaust Heat RECIRCULATION System [2GR-FXE] - Diagnostics & Circuit Tests - (Hybrid) >> Exhaust Heat RECIRCULATION System >> Circuit Test >> Exhaust Heat RECIRCULATION System Circuit [02/2014 - 11/2016] >> Procedure

Exhaust Heat RECIRCULATION System Circuit [02/2014 - 11/2016]: Procedure

  1. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - TEMPERATURE SWITCH - BODY GROUND) 
    1. Disconnect the F22 combination meter assembly connector.
    2. Disconnect the P2 temperature switch connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      F22-5 (TWS2) - P2-2 (TWS2) Always Below 1 Ω
      P2-1 (GND) - Body ground Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      F22-5 (TWS2) or P2-2 (TWS2) - Body ground Always 10 kΩ or higher

      Result

      Result
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    Go to next step 

  2. CHECK COMBINATION METER ASSEMBLY 
    1. Turn the power switch on (IG).
    2. Disconnect the P2 temperature switch connector.
    3. Check the water temperature receiver gauge in the combination meter assembly.

      Result

      Result Proceed to
      Water temperature receiver gauge needle jumps from normal value to HI side A
      Water temperature receiver gauge needle jumps to HI side and stays there even after the connector is disconnected B
      Water temperature receiver gauge needle does not move from normal value even after the connector is disconnected C

    Result: 

    END 

    Result: 

    REPLACE COMBINATION METER ASSEMBLY.  Refer to REMOVAL [02/2014 - ] .

    Result: 

    Go to next step 

  3. REPLACE TEMPERATURE SWITCH 
    1. Replace the temperature switch.

      Refer to REMOVAL [02/2014 - 11/2016] .

    Result: 

    NEXT 

    Go to next step 

  4. CHECK COMBINATION METER ASSEMBLY 
    1. Turn the power switch on (IG).
    2. Disconnect the P2 temperature switch connector.
    3. Check the water temperature receiver gauge in the combination meter assembly.

      Result

      Result Proceed to
      Water temperature receiver gauge needle jumps from normal value to HI side A
      Water temperature receiver gauge needle jumps to HI side and stays there even after the connector is disconnected B

    Result: 

    END 

    Result: 

    REPLACE COMBINATION METER ASSEMBLY.  Refer to REMOVAL [02/2014 - ] .