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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 21 (Hybrid Control System - Diagnostic Codes (1 Of 7)) >> HYBRID CONTROL SYSTEM (for THS-HEV Model) >> DTC P0A30-2A: Drive Motor "B" Temperature Sensor Signal Stuck In Range [10/2022 - ] >> Procedure

DTC P0A30-2A: Drive Motor "B" Temperature Sensor Signal Stuck In Range [10/2022 - ]: Procedure

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  1. CHECK DTC OUTPUT (HYBRID CONTROL) 

    Pre-procedure1

    • None.
    • Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Result Proceed to
      No DTCs are output, or DTCs except the ones in the table below are also output. A
      Any of the following DTCs are also output. B
      Relevant DTC
      P0A30-11 Drive Motor "B" Temperature Sensor Circuit Short to Ground
      P0A30-15 Drive Motor "B" Temperature Sensor Circuit Short to Battery or Open

    Post-procedure1

    • Turn the ignition switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2022 - 10/2024]  , or Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2024 - ] 

    Result: 

    A 

    See step  2

  2. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) 

    See step  1

    Result

    Result Proceed to
    OK A
    NG (The connector is not connected securely.) B
    NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    Result: 

    B 

    CONNECT SECURELY 

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    A 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (REAR MOTOR TEMPERATURE SENSOR - HYBRID VEHICLE CONTROL ECU) 

    Pre-procedure1

    • Disconnect the hybrid vehicle control ECU connector.
    • Measure the resistance according to the value(s) in the table below.
      GTY1131610Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU)

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      C59-48 (RMT) - C59-47 (RMTG) Ignition switch off 0.3443 to 1446 kΩ kΩ

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Reconnect the hybrid vehicle control ECU connector.

    Result: 

    NG 

    See step  10

    Result: 

    OK 

    See step  4

  4. CHECK CONNECTOR CONNECTION CONDITION (FLOOR WIRE CONNECTOR) 

    HINT: 

    See step  3

    Result

    Result Proceed to
    OK A
    NG (The connector is not connected securely.) B
    NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    Result: 

    B 

    CONNECT SECURELY 

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    A 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL WIRE -HYBRID VEHICLE CONTROL ECU) 

    Pre-procedure1

    • Disconnect the instrument panel wire connector.
    • Disconnect the hybrid vehicle control ECU connector.
    • Measure the resistance according to the value(s) in the table below.

      HINT: 

      When performing the measurement, lightly jiggle the wire harness up and down and left and right and confirm that the resistance does not fluctuate.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition Result
      CH1-45 (RMT) - C59-48 (RMT) Ignition switch off Below 1 Ω Ω
      CH1-23 (RMTG) - C59-47 (RMTG) Ignition switch off Below 1 Ω Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition Result
      CH1-45 (RMT) or C59-48 (RMT) - Body ground and other terminals Ignition switch off 10 kΩ or higher kΩ
      CH1-23 (RMTG) or C59-47 (RMTG) - Body ground and other terminals Ignition switch off 10 kΩ or higher kΩ

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Reconnect the hybrid vehicle control ECU connector.
    • Reconnect the instrument panel wire connector.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  6

  6. CHECK CONNECTOR CONNECTION CONDITION (INSTRUMENT PANEL WIRE CONNECTOR) 

    HINT: 

    See step  2

    Result

    Result Proceed to
    OK A
    NG (The connector is not connected securely.) B
    NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    Result: 

    B 

    CONNECT SECURELY 

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    A 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (FLOOR WIRE - INSTRUMENT PANEL WIRE) 

    Pre-procedure1

    • Disconnect the instrument panel wire connector.
    • Disconnect the floor wire connector.
    • Measure the resistance according to the value(s) in the table below.

      HINT: 

      When performing the measurement, lightly jiggle the wire harness up and down and left and right and confirm that the resistance does not fluctuate.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition Result
      IH3-5 - CH1-45 Ignition switch off Below 1 Ω Ω
      IH3-16 - CH1-23 Ignition switch off Below 1 Ω Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition Result
      IH3-5 or CH1-45 - Body ground and other terminals Ignition switch off 10 kΩ or higher kΩ
      IH3-16 or CH1-23 - Body ground and other terminals Ignition switch off 10 kΩ or higher kΩ

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Reconnect the floor wire connector.
    • Reconnect the instrument panel wire connector.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  8

  8. CHECK CONNECTOR CONNECTION CONDITION (REAR MOTOR TEMPERATURE SENSOR CONNECTOR) 

    HINT: 

    See step  10

    Result

    Result Proceed to
    OK A
    NG (The connector is not connected securely.) B
    NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    Result: 

    B 

    CONNECT SECURELY 

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    A 

    See step  9

  9. CHECK HARNESS AND CONNECTOR (REAR MOTOR TEMPERATURE SENSOR - FLOOR WIRE) 

    Pre-procedure1

    • Disconnect the floor wire connector.
    • Remove the rear suspension member sub-assembly.

      HINT: 

      Refer to REMOVAL [10/2022 - ]

    • Disconnect the rear motor temperature sensor connector.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition Result
      I3-2 (RMT) - IH3-5 Ignition switch off Below 1 Ω Ω
      I3-1 (RMTG) - IH3-16 Ignition switch off Below 1 Ω Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition Result
      I3-2 (RMT) or IH3-5 - Body ground and other terminals Ignition switch off 10 kΩ or higher kΩ
      I3-1 (RMTG) or IH3-16 - Body ground and other terminals Ignition switch off 10 kΩ or higher kΩ

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Reconnect the rear motor temperature sensor connector.
    • Reinstall the rear suspension member sub-assembly.
    • Reconnect the floor wire connector.

    Result: 

    OK 

    REPLACE REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY. Refer to  REMOVAL [10/2022 - 08/2023]  , or refer to  REMOVAL [08/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  10. CHECK HARNESS AND CONNECTOR (REAR MOTOR TEMPERATURE SENSOR - INSTRUMENT PANEL WIRE) 

    Pre-procedure1

    • Disconnect the instrument panel wire connector.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      CH1-45 - CH1-23 Ignition switch off 0.3443 to 1446 kΩ kΩ

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Reconnect the instrument panel wire connector.

    Result: 

    OK 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (REAR MOTOR TEMPERATURE SENSOR - INSTRUMENT PANEL WIRE) 

    Result: 

    NG 

    See step  11

  11. CHECK HARNESS AND CONNECTOR (REAR MOTOR TEMPERATURE SENSOR - FLOOR WIRE) 

    Pre-procedure1

    • Disconnect the floor wire connector.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      IH3-5 - IH3-16 Ignition switch off 0.3443 to 1446 kΩ kΩ

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Reconnect the floor wire connector.

    Result: 

    OK 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (REAR MOTOR TEMPERATURE SENSOR - FLOOR WIRE) 

    Result: 

    NG 

    See step  12

  12. INSPECT REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY (REAR MOTOR TEMPERATURE SENSOR) 

    See step  7

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    NG 

    REPLACE REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY. Refer to  REMOVAL [10/2022 - 08/2023]  , or refer to  REMOVAL [08/2023 - ] 

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