LKA/LDA SYSTEM, Diagnostic DTC:C1A75

DTC Code DTC Name
C1A75 Lost Communication with Steering Vibrator System

DESCRIPTION

The forward recognition camera communicates with the steering vibration ECU via LIN communication.

If a communication error between the forward recognition camera and steering vibration ECU is detected, DTC C1A75 is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1A75 Lost Communication with Steering Vibrator System

When all of the following conditions are met:


  • The vehicle speed is 5 km/h (4 mph) or more.

  • The lane departure alert system is on.

  • A LIN communication error between the forward recognition camera and steering vibration ECU (steering wheel assembly) is detected for 5 minutes or more.

  • Forward recognition camera

  • Steering vibration ECU (Steering wheel assembly)

  • Spiral cable sub-assembly

  • Wire harness or connector

WIRING DIAGRAM

B006AEUE01

CAUTION / NOTICE / HINT

Note


  • Inspect the fuses for circuits related to this system before performing the following procedure.

  • When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.

  • If the forward recognition camera has been replaced with a new one, be sure to perform forward recognition camera adjustment.

    Click here

PROCEDURE


  1. CHECK FORWARD RECOGNITION CAMERA (CHECK WAVEFORM)


    1. Turn the engine switch off.

    2. Disconnect the z7 spiral with sensor cable sub-assembly connector.

    3. Turn the engine switch on (IG).

    4. B006B99N01

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z7-2 (LDA) - Body ground Engine switch on (IG) 5 V/DIV, 1 ms/DIV
      OK
      The waveform appears as shown in the illustration.

    5. Turn the engine switch off.

    6. Connect the z7 spiral with sensor cable sub-assembly connector.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (FORWARD RECOGNITION CAMERA - STEERING VIBRATION ECU) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (STEERING VIBRATION ECU POWER SOURCE CIRCUIT)


    1. Turn the engine switch off.

    2. Disconnect the z7 spiral with sensor cable sub-assembly connector.

    3. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      z7-4 (BHT) - Body ground Engine switch on (IG) 11 to 14 V

    5. Turn the engine switch off.

    6. Connect the z7 spiral with sensor cable sub-assembly connector.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (STEERING VIBRATION ECU POWER SOURCE CIRCUIT) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY - BODY GROUND)


    1. Turn the engine switch off.

    2. Disconnect the z7 spiral with sensor cable sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z7-1 (EHT) - Body ground Always Below 1 Ω

    4. Connect the z7 spiral with sensor cable sub-assembly connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STEERING VIBRATION ECU (STEERING WHEEL ASSEMBLY) Click here

    NG

  4. CHECK HARNESS AND CONNECTOR (SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY - BODY GROUND)


    1. Turn the engine switch off.

    2. Disconnect the G28 spiral with sensor cable sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G28-2 (EHT) - Body ground Always Below 1 Ω

    4. Connect the G28 spiral with sensor cable sub-assembly connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. CHECK HARNESS AND CONNECTOR (STEERING VIBRATION ECU POWER SOURCE CIRCUIT)


    1. Turn the engine switch off.

    2. Disconnect the G28 spiral with sensor cable sub-assembly connector.

    3. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G28-4 (BHT) - Body ground Engine switch on (IG) 11 to 14 V

    5. Turn the engine switch off.

    6. Connect the G28 spiral with sensor cable sub-assembly connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. CHECK HARNESS AND CONNECTOR (FORWARD RECOGNITION CAMERA - STEERING VIBRATION ECU)


    1. Turn the engine switch off.

    2. Disconnect the N5 forward recognition camera connector.

    3. Disconnect the z7 spiral with sensor cable sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z7-2 (LDA) - N5-2 (STRV) Always Below 1 Ω
      z7-2 (LDA) or N5-2 (STRV) - Body ground Engine switch off 10 kΩ or higher

    5. Connect the z7 spiral with sensor cable sub-assembly connector.

    6. Connect the N5 forward recognition camera connector.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY - FORWARD RECOGNITION CAMERA) Click here

    OK

  7. REPLACE FORWARD RECOGNITION CAMERA


    1. Replace the forward recognition camera.

      Click here

    2. Perform Forward Recognition Camera Learning.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    END

  8. CHECK HARNESS AND CONNECTOR (SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY - FORWARD RECOGNITION CAMERA)


    1. Turn the engine switch off.

    2. Disconnect the N5 forward recognition camera connector.

    3. Disconnect the G28 spiral with sensor cable sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G28-1 (LDA) - N5-2 (STRV) Always Below 1 Ω
      G28-1 (LDA) or N5-2 (STRV) - Body ground Engine switch off 10 kΩ or higher

    5. Connect the G28 spiral with sensor cable sub-assembly connector.

    6. Connect the N5 forward recognition camera connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR