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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 92 (Heating / Air Conditioning System (HV) - Diagnostic Codes (3 Of 3), Circuit Tests & Symptom Tests) >> AIR CONDITIONING SYSTEM (for HV Model) >> DTC P153B-15: Rear Evaporator Temperature Sensor Circuit Short to Battery or Open [11/2023 - ] >> Procedure

DTC P153B-15: Rear Evaporator Temperature Sensor Circuit Short to Battery or Open [11/2023 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK REAR EVAPORATOR TEMP. SENSOR (NO. 2 AIR CONDITIONING HARNESS ASSEMBLY) CIRCUIT 

    Pre-procedure1

    1. Disconnect the M15 rear evaporator temp. sensor (No. 2 air conditioning harness assembly) connector.
      GTY1249866Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Rear Evaporator Temp. Sensor (No. 2 Air Conditioning Harness Assembly))

      Procedure1

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

      Standard Voltage

      Tester Connection Condition Specified Condition
      M15-8 (+) - Body ground Ignition switch ON 0 to 5.5 V

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. None

    Result: 

    NG 

    See step  5

    Result: 

    OK 

    See step  2

  2. CLEAR DTC 
    1. Clear the DTCs.

      Body Electrical > Air Conditioner > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  3

  3. CHECK FOR DTC 

    Pre-procedure1

    1. Turn the ignition switch off.
    2. Disconnect the M15 rear evaporator temp. sensor (No. 2 air conditioning harness assembly) connector.
      GTY1249867Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Rear Evaporator Temp. Sensor (No. 2 Air Conditioning Harness Assembly))
    3. Connect terminals 7 and 8 of the rear evaporator temp. sensor (No. 2 air conditioning harness assembly) connector on the wire harness side.
      GTY1233112Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Rear Evaporator Temp. Sensor (No. 2 Air Conditioning Harness Assembly)
      *2 Air Conditioning Amplifier Assembly
    4. Turn the ignition switch to ON and wait for 4 seconds or more.

      Procedure1

    5. Check for DTCs.

      Body Electrical > Air Conditioner > Trouble Codes 

      Result

      Result Proceed to
      P153B-11 is output A
      P153B-15 is output B

      Post-procedure1

    6. None

    Result: 

    A 

    REPLACE REAR EVAPORATOR TEMP. SENSOR (NO. 2 AIR CONDITIONING HARNESS ASSEMBLY) 

    Refer to REMOVAL [12/2019 - ]

    Result: 

    B 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - REAR EVAPORATOR TEMP. SENSOR (NO. 2 AIR CONDITIONING HARNESS ASSEMBLY)) 

    Pre-procedure1

    1. Disconnect the M15 rear evaporator temp. sensor (No. 2 air conditioning harness assembly) connector.
    2. Disconnect the H65 air conditioning amplifier assembly connector.

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      M15-8 (+) - H65-11 (TEC) Always Below 1 Ω
      M15-7 (-) - H65-15 (SG-9) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    4. None

    Result: 

    OK 

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  5. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - REAR EVAPORATOR TEMP. SENSOR (NO. 2 AIR CONDITIONING HARNESS ASSEMBLY)) 

    Pre-procedure1

    1. Disconnect the M15 rear evaporator temp. sensor (No. 2 air conditioning harness assembly) connector.
    2. Disconnect the H65 air conditioning amplifier assembly connector.

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      M15-8 (+) or H65-11 (TEC) - Other terminals and body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    4. None

    Result: 

    OK 

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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