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Inspection Procedure

  1. SYSTEM CHECK 
    1. Check if the vehicle is equipped with the advanced parking guidance system.

      Result 

      RESULT CHART

      Result Proceed to
      w/o Advanced parking guidance system A
      w/ Advanced parking guidance system B

    B:  Go to step  23

    A: Go to Next Step 

  2. CHECK DTC OUTPUT 
    1. Clear the DTCs (see DTC CHECK/CLEAR ).
    2. Check for DTCs (see DTC CHECK/CLEAR ).

      Result 

      DTC OUTPUT RESULT

      Result Proceed to
      C1AEC is output A
      No DTC is output B

    B: END 

    A: Go to Next Step 

  3. CHECK CLEARANCE WARNING ECU 
    1. Reconnect the L19 ECU connector.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      L19-19 (E1) - Body ground Always Below 1 Ω
    3. Measure the voltage according to the value (s) in the table below.

      Standard voltage 

      VOLTAGE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      L19-21 (BOF) - Body ground Engine switch on (IG) 7.2 to 8.8 V
      Fig 1: Identifying L19 ECU Connector Terminals
      G06192379Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPLACE CLEARANCE WARNING ECU  (See REMOVAL )

      OK: Go to Next Step 

  4. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - FRONT LEFT SIDE SENSOR) 
    1. Disconnect the L19 ECU connector.
    2. Disconnect the D1 sensor connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      L19-21 (BOF) - D1-1 (BI) Always Below 1 Ω
      L19-9 (SOF) - D1-3 (SI) Always Below 1 Ω
      L19-19 (E1) - D1-5 (EI) Always Below 1 Ω
      L19-21 (BOF) - Body ground Always 10 kΩ or higher
      L19-9 (SOF) - Body ground Always 10 kΩ or higher
      L19-19 (E1) - Body ground Always 10 kΩ or higher
      Fig 2: Identifying L19 Clearance Warning ECU And D1 Front Left Side Sensor Connector Terminals
      G04951845Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to Next Step 

  5. CHECK HARNESS AND CONNECTOR (FRONT LEFT SIDE SENSOR - FRONT LEFT CORNER SENSOR) 
    1. Disconnect the D1 and D2 sensor connectors.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      D1-2 (BO) - D2-1 (BI) Always Below 1 Ω
      D1-4 (SO) - D2-3 (SI) Always Below 1 Ω
      D1-6 (EO) - D2-5 (EI) Always Below 1 Ω
      D1-2 (BO) - Body ground Always 10 kΩ or higher
      D1-4 (SO) - Body ground Always 10 kΩ or higher
      D1-6 (EO) - Body ground Always 10 kΩ or higher
      Fig 3: Identifying D1 And D2 Sensor Connector Terminals
      G06192381Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to Next Step 

  6. CHECK HARNESS AND CONNECTOR (FRONT LEFT CORNER SENSOR - FRONT LEFT CENTER SENSOR) 
    1. Disconnect the D2 and D3 sensor connectors.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      D2-2 (BO) - D3-1 (BI) Always Below 1 Ω
      D2-4 (SO) - D3-3 (SI) Always Below 1 Ω
      D2-6 (EO) - D3-5 (EI) Always Below 1 Ω
      D2-2 (BO) - Body ground Always 10 kΩ or higher
      D2-4 (SO) - Body ground Always 10 kΩ or higher
      D2-6 (EO) - Body ground Always 10 kΩ or higher
      Fig 4: Identifying D2 Front Left Corner And D3 Front Left Center Sensor Connector Terminals
      G04951847Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to Next Step 

  7. CHECK HARNESS AND CONNECTOR (FRONT LEFT CENTER SENSOR - FRONT RIGHT CENTER SENSOR) 
    1. Disconnect the D3 and D4 sensor connectors.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      D3-2 (BO) - D4-1 (BI) Always Below 1 Ω
      D3-4 (SO) - D4-3 (SI) Always Below 1 Ω
      D3-6 (EO) - D4-5 (EI) Always Below 1 Ω
      D3-2 (BO) - Body ground Always 10 kΩ or higher
      D3-4 (SO) - Body ground Always 10 kΩ or higher
      D3-6 (EO) - Body ground Always 10 kΩ or higher
      Fig 5: Identifying D3 Front Left Center And D4 Front Right Center Sensor Connector Terminals
      G04951848Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to Next Step 

  8. CHECK HARNESS AND CONNECTOR (FRONT RIGHT CENTER SENSOR - FRONT RIGHT CORNER SENSOR) 
    1. Disconnect the D4 and D6 sensor connectors.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      D4-2 (BO) - D6-1 (BI) Always Below 1 Ω
      D4-4 (SO) - D6-3 (SI) Always Below 1 Ω
      D4-6 (EO) - D6-5 (EI) Always Below 1 Ω
      D4-2 (BO) - Body ground Always 10 kΩ or higher
      D4-4 (SO) - Body ground Always 10 kΩ or higher
      D4-6 (EO) - Body ground Always 10 kΩ or higher
      Fig 6: Identifying D4 Front Right Center And D6 Front Right Corner Sensor Connector Terminals
      G04951849Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to Next Step 

  9. CHECK HARNESS AND CONNECTOR (FRONT RIGHT CORNER SENSOR - FRONT RIGHT SIDE SENSOR) 
    1. Disconnect the D6 and D5 sensor connectors.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      D6-2 (BO) - D5-1 (BI) Always Below 1 Ω
      D6-4 (SO) - DS-3 (SI) Always Below 1 Ω
      D6-6 (EO) - D5-5 (EI) Always Below 1 Ω
      D6-2 (BO) - Body ground Always 10 kΩ or higher
      D6-4 (SO) - Body ground Always 10 kΩ or higher
      D6-6 (EO) - Body ground Always 10 kΩ or higher
      Fig 7: Identifying D6 Front Right Corner And D5 Front Right Side Sensor Connector Terminals
      G04951850Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to Next Step 

  10. CHECK DTC OUTPUT 
    1. Clear the DTCs (see DTC CHECK/CLEAR ).
    2. Check for DTCs (see DTC CHECK/CLEAR ).

      Result 

      DTC OUTPUT RESULT

      Result Proceed to
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Left, Front Center and Front Right) A
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Center and Front Right) B
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Right) C
      No DTC is output D

    B:  Go to step  17

    C:  Go to step  21

    D: END 

    A: Go to Next Step 

  11. REPLACE NO. 2 ULTRASONIC SENSOR (FRONT LEFT SIDE SENSOR) 
    1. Replace the ultrasonic sensor (see REMOVAL ) with a normally functioning sensor.
    Fig 8: Identifying No. 2 Ultrasonic Sensor (Front Left Side)
    G05776478Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. CHECK DTC OUTPUT 
    1. Clear the DTCs (see DTC CHECK/CLEAR ).
    2. Check for DTCs (see DTC CHECK/CLEAR ).

      Result 

      DTC OUTPUT RESULT

      Result Proceed to
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Left, Front Center and Front Right) A
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Center and Front Right) B
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Right) C
      No DTC is output D

    B:  Go to step  17

    C:  Go to step  21

    D: END 

    A: Go to Next Step 

  13. REPLACE NO. 2 ULTRASONIC SENSOR (FRONT RIGHT SIDE SENSOR) 
    1. Replace the ultrasonic sensor (see REMOVAL ) with a normally functioning sensor.
    Fig 9: Identifying No. 2 Ultrasonic Sensor (Front Right Side)
    G05776478Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  14. CHECK DTC OUTPUT 
    1. Clear the DTCs (see DTC CHECK/CLEAR ).
    2. Check for DTCs (see DTC CHECK/CLEAR ).

      Result 

      DTC OUTPUT RESULT

      Result Proceed to
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Left, Front Center and Front Right) A
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Center and Front Right) B
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Right) C
      No DTC is output D

    B:  Go to step  17

    C:  Go to step  21

    D: END 

    A: Go to Next Step 

  15. REPLACE NO. 1 ULTRASONIC SENSOR (FRONT LEFT CORNER SENSOR) 
    1. Replace the ultrasonic sensor (see REMOVAL ) with a normally functioning sensor.
    Fig 10: Identifying No. 1 Ultrasonic Sensor (Front Left Corner Sensor)
    G04951833Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  16. CHECK DTC OUTPUT 
    1. Clear the DTCs (see DTC CHECK/CLEAR ).
    2. Check for DTCs (see DTC CHECK/CLEAR ).

      Result 

      DTC OUTPUT RESULT

      Result Proceed to
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Left, Front Center and Front Right) A
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Center and Front Right) B
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Right) C
      No DTC is output D

    B: REPLACE CLEARANCE WARNING ECU  (See REMOVAL )

    C:  Go to step  21

    D: END 

    A: Go to Next Step 

  17. REPLACE NO. 1 ULTRASONIC SENSOR (FRONT LEFT CENTER SENSOR) 
    1. Replace the ultrasonic sensor (see REMOVAL ) with a normally functioning sensor.
    Fig 11: Identifying No. 1 Ultrasonic Sensor (Front Left Center Sensor)
    G04951833Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  18. CHECK DTC OUTPUT 
    1. Clear the DTCs (see DTC CHECK/CLEAR ).
    2. Check for DTCs (see DTC CHECK/CLEAR ).

      Result 

      DTC OUTPUT RESULT

      Result Proceed to
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Center and Front Right) A
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Right) B
      No DTC is output C

    B:  Go to step  21

    C: END 

    A: Go to Next Step 

  19. REPLACE NO. 1 ULTRASONIC SENSOR (FRONT RIGHT CENTER SENSOR) 
    1. Replace the ultrasonic sensor (see REMOVAL ) with a normally functioning sensor.
    Fig 12: Identifying No. 1 Ultrasonic Sensor (Front Right Center Sensor)
    G04951833Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  20. CHECK DTC OUTPUT 
    1. Clear the DTCs (see DTC CHECK/CLEAR ).
    2. Check for DTCs (see DTC CHECK/CLEAR ).

      Result 

      DTC OUTPUT RESULT

      Result Proceed to
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Center and Front Right) A
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Right) B
      No DTC is output C

    B: REPLACE CLEARANCE WARNING ECU  (See REMOVAL )

    C: END 

    A: Go to Next Step 

  21. REPLACE NO. 1 ULTRASONIC SENSOR (FRONT RIGHT CORNER SENSOR) 
    1. Replace the ultrasonic sensor (see REMOVAL ) with a normally functioning sensor.
    Fig 13: Identifying No. 1 Ultrasonic Sensor (Front Right Corner Sensor)
    G04951833Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  22. CHECK DTC OUTPUT 
    1. Clear the DTCs (see DTC CHECK/CLEAR ).
    2. Check for DTCs (see DTC CHECK/CLEAR ).

      Result 

      DTC OUTPUT RESULT

      Result Proceed to
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Right) A
      No DTC is output B

    B: END 

    A: REPLACE CLEARANCE WARNING ECU  (See REMOVAL )

  23. CHECK DTC OUTPUT 
    1. Clear the DTCs (see DTC CHECK/CLEAR ).
    2. Check for DTCs (see DTC CHECK/CLEAR ).

      Result 

      DTC OUTPUT RESULT

      Result Proceed to
      DTC C1AEC and C1AEE are output A
      DTC C1AEC is output B
      No DTCs are output C

    B: GO TO DTC C1AEE  (See DTC C1AEE APGS SENSOR COMMUNICATION CIRCUIT )

    C: END 

    A: Go to Next Step 

  24. CHECK PARKING ASSIST ECU 
    1. Reconnect the L19 ECU connector.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      L91-32 (CSG1) - Body ground Always Below 1 Ω
    3. Measure the voltage according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      L91-31 (CSB1) - Body ground Engine switch on (IG) 7.2 to 8.8 V
      Fig 14: Identifying L19 Parking Assist ECU Connector Terminals
      G04951857Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPLACE PARKING ASSIST ECU  (See REMOVAL )

      OK: Go to Next Step 

  25. CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - FRONT LEFT CORNER SENSOR) 
    1. Disconnect the L91 ECU connector.
    2. Disconnect the D2 sensor connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      L91-31 (CSB1) - D2-1 (BI) Always Below 1 Ω
      L91-33 (LIN1) - D2-3 (SI) Always Below 1 Ω
      L91-32 (CSG1) - D2-5 (EI) Always Below 1 Ω
      L91-31 (CSB1) - Body ground Always 10 kΩ or higher
      L91-33 (LIN1) - Body ground Always 10 kΩ or higher
      L91-32 (CSG1) - Body ground Always 10 kΩ or higher
      Fig 15: Identifying L91 ECU And D2 Sensor Connector Terminals
      G04951858Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to Next Step 

  26. CHECK HARNESS AND CONNECTOR (FRONT LEFT CORNER SENSOR - FRONT LEFT CENTER SENSOR) 
    1. Disconnect the D2 and D3 sensor connectors.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      D2-2 (BO) - D3-1 (BI) Always Below 1 Ω
      D2-4 (SO) - D3-3 (SI) Always Below 1 Ω
      D2-6 (EO) - D3-5 (EI) Always Below 1 Ω
      D2-2 (BO) - Body ground Always 10 kΩ or higher
      D2-4 (SO) - Body ground Always 10 kΩ or higher
      D2-6 (EO) - Body ground Always 10 kΩ or higher
      Fig 16: Identifying D2 Front Left Corner And D3 Front Left Center Sensor Connector Terminals
      G04951871Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to Next Step 

  27. CHECK HARNESS AND CONNECTOR (FRONT LEFT CENTER SENSOR - FRONT RIGHT CENTER SENSOR) 
    1. Disconnect the D3 and D4 sensor connectors.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      D3-2 (BO) - D4-1 (BI) Always Below 1 Ω
      D3-4 (SO) - D4-3 (SI) Always Below 1 Ω
      D3-6 (EO) - D4-5 (EI) Always Below 1 Ω
      D3-2 (BO) - Body ground Always 10 kΩ or higher
      D3-4 (SO) - Body ground Always 10 kΩ or higher
      D3-6 (EO) - Body ground Always 10 kΩ or higher
      Fig 17: Identifying D3 Front Left Center And D4 Front Right Center Sensor Connector Terminals
      G04951848Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to Next Step 

  28. CHECK HARNESS AND CONNECTOR (FRONT RIGHT CENTER SENSOR - FRONT RIGHT CORNER SENSOR) 
    1. Disconnect the D4 and D6 sensor connectors.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      D4-2 (BO) - D6-1 (BI) Always Below 1 Ω
      D4-4 (SO) - D6-3 (SI) Always Below 1 Ω
      D4-6 (EO) - D6-5 (EI) Always Below 1 Ω
      D4-2 (BO) - Body ground Always 10 kΩ or higher
      D4-4 (SO) - Body ground Always 10 kΩ or higher
      D4-6 (EO) - Body ground Always 10 kΩ or higher
      Fig 18: Identifying D4 Front Right Center And D6 Front Right Corner Sensor Connector Terminals
      G06192396Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to Next Step 

  29. CHECK DTC OUTPUT 
    1. Clear the DTCs (see DTC CHECK/CLEAR ).
    2. Check for DTCs (see DTC CHECK/CLEAR ).

      Result 

      DTC OUTPUT RESULT

      Result Proceed to
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Left, Front Center and Front Right) A
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Center and Front Right) B
      No DTC is output C

    B:  Go to step  34

    C: END 

    A: Go to Next Step 

  30. REPLACE NO. 1 ULTRASONIC SENSOR (FRONT LEFT CORNER SENSOR) 
    1. Replace the ultrasonic sensor (see REMOVAL ) with a normally functioning sensor.
    Fig 19: Identifying No. 1 Ultrasonic Sensor (Front Left Corner Sensor)
    G04951833Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  31. CHECK DTC OUTPUT 
    1. Clear the DTCs (see DTC CHECK/CLEAR ).
    2. Check for DTCs (see DTC CHECK/CLEAR ).

      Result 

      DTC OUTPUT RESULT

      Result Proceed to
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Left, Front Center and Front Right) A
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Center and Front Right) B
      No DTC is output C

    B:  Go to step  34

    C: END 

    A: Go to Next Step 

  32. REPLACE NO. 1 ULTRASONIC SENSOR (FRONT RIGHT CORNER SENSOR) 
    1. Replace the ultrasonic sensor (see REMOVAL ) with a normally functioning sensor.
    Fig 20: Identifying No. 1 Ultrasonic Sensor (Front Right Corner Sensor)
    G04951833Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  33. CHECK DTC OUTPUT 
    1. Clear the DTCs (see DTC CHECK/CLEAR ).
    2. Check for DTCs (see DTC CHECK/CLEAR ).

      Result 

      DTC OUTPUT RESULT

      Result Proceed to
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Left, Front Center and Front Right) A
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Center and Front Right) B
      No DTC is output C

    B: REPLACE PARKING ASSIST ECU  (See REMOVAL )

    C: END 

    A: Go to Next Step 

  34. REPLACE NO. 1 ULTRASONIC SENSOR (FRONT LEFT CENTER SENSOR) 
    1. Replace the ultrasonic sensor (see REMOVAL ) with a normally functioning sensor.
    Fig 21: Identifying No. 1 Ultrasonic Sensor (Front Left Center Sensor)
    G04951833Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  35. CHECK DTC OUTPUT 
    1. Clear the DTCs (see DTC CHECK/CLEAR ).
    2. Check for DTCs (see DTC CHECK/CLEAR ).

      Result 

      DTC OUTPUT RESULT

      Result Proceed to
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Center and Front Right) A
      No DTC is output B

    B: END 

    A: Go to Next Step 

  36. REPLACE NO. 1 ULTRASONIC SENSOR (FRONT RIGHT CENTER SENSOR) 
    1. Replace the ultrasonic sensor (see REMOVAL ) with a normally functioning sensor.
    Fig 22: Identifying No. 1 Ultrasonic Sensor (Front Right Center Sensor)
    G04951833Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  37. CHECK DTC OUTPUT 
    1. Clear the DTCs (see DTC CHECK/CLEAR ).
    2. Check for DTCs (see DTC CHECK/CLEAR ).

      Result 

      DTC OUTPUT RESULT

      Result Proceed to
      DTC C1AEC is output And, multi-information display indicates open circuit (Front Right) A
      No DTC is output B

    B: END 

    A: REPLACE PARKING ASSIST ECU  (See REMOVAL )

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