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Home >> Infiniti >> 2017 >> Q60 Base, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Driver Assistance System (ADAS Control Unit) (Introduction, Basic Diagnosis, DTC/Circuit Diagnosis) (1 Of 2) >> DTC/Circuit Diagnosis >> DTC C1A13: Stop Lamp Relay >> ADAS Control Unit >> Diagnosis Procedure (2.0 Turbo Gasoline Engine)

Diagnosis Procedure (2.0 Turbo Gasoline Engine)

  1. CHECK DTC PRIORITY

    If DTC "C1A13" is displayed with DTC "U1000", first diagnose the DTC "U1000".

    Is applicable DTC detected?

    YES 

    Perform diagnosis of applicable. Refer to DTC DESCRIPTION .

    NO 

    GO TO STEP 2  .

  2. CHECK STOP LAMP SWITCH

    Check that "STOP LAMP SW" operate normally in "DATA MONITOR" of "ICC/ADAS".

    Is the inspection result normal?

    YES 

    GO TO STEP 13. 

    NO 

    GO TO STEP 3  .

  3. CHECK STOP LAMP SWITCH INSTALLATION

    1. Turn Ignition Switch OFF.
    2. Check stop lamp Switch for correct installation. Refer to INSPECTION AND ADJUSTMENT .

    Is the inspection result normal?

    YES 

    GO TO STEP 4. 

    NO 

    Adjust stop lamp Switch installation. Refer to INSPECTION AND ADJUSTMENT .

  4. CHECK STOP LAMP SWITCH

    1. Disconnect stop lamp Switch connector.
    2. Check stop lamp Switch. Refer to COMPONENT INSPECTION (STOP LAMP SWITCH) .

    Is the inspection result normal?

    YES 

    GO TO STEP 5. 

    NO 

    Replace stop lamp Switch.

  5. CHECK STOP LAMP FOR ILLUMINATION

    1. Connect stop lamp Switch connector.
    2. Remove ICC brake hold relay.
    3. Check that the stop lamp is illuminated by depressing the brake pedal to turn the stop lamp ON.

    Is the inspection result normal?

    YES 

    GO TO STEP 6. 

    NO 

    Check the stop lamp circuit, and repair or replace the malfunctioning parts.

  6. CHECK STOP LAMP SWITCH INPUT SIGNAL

    Check the voltage between BCM harness connector and ground.

    Terminals Voltage
    (Approx.)
    (+) (-)
    BCM Ground
    Connector Terminal
    M13 25 Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 7. 

    NO 

    Repair the harnesses or connectors.

  7. CHECK HARNESS BETWEEN STOP LAMP SWITCH AND BCM

    1. Disconnect the stop lamp Switch connector.
    2. Check for continuity between stop lamp Switch harness connector and BCM harness connector.
      Stop lamp Switch BCM Continuity
      Connector Terminal Connector Terminal
      E57 4 M13 27 Existed
    3. Check for continuity between stop lamp Switch harness connector and ground.
      Stop lamp Switch Ground Continuity
      Connector Terminal
      E57 4 Not existed

    Is the inspection result normal?

    YES 

    GO TO STEP 8. 

    NO 

    Repair the harnesses or connectors.

  8. CHECK ICC BRAKE HOLD RELAY CIRCUIT

    1. Connect all connectors again if the connectors are disconnected.
    2. Check that the stop lamp does not illuminate when brake pedal is not depressed.

    Is the inspection result normal?

    YES 

    GO TO STEP 10. 

    NO 

    GO TO STEP 9. 

  9. CHECK ICC BRAKE HOLD RELAY

    1. Remove ICC brake hold relay.
    2. Check ICC brake hold relay. Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 10. 

    NO 

    Replace ICC brake hold relay.

  10. PERFORM SELF-DIAGNOSIS OF BCM

    1. Connect all connectors again if the connectors are disconnected.
    2. Turn Ignition Switch ON.
    3. Perform "All DTC Reading".
    4. Check if any DTC is detected in "Self Diagnostic Result" of "BCM". Refer to DTCINDEX .

    Is any DTC detected?

    YES 

    Repair or replace the malfunctioning parts identified by the self-diagnosis result.

    NO 

    GO TO STEP 11. 

  11. CHECK ICC BRAKE HOLD RELAY POWER SUPPLY CIRCUIT

    1. Turn Ignition Switch OFF.
    2. Remove ICC brake hold relay.
    3. Turn Ignition Switch ON.
    4. Check the voltage between ICC brake hold relay harness connector and ground.
      Terminal Voltage
      (Approx.)
      (+) (-)
      ICC brake hold relay Ground
      Connector Terminal
      E52 2 Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 12. 

    NO 

    Repair or replace ICC brake hold relay power supply circuit.

  12. CHECK HARNESS BETWEEN AND ICC BRAKE HOLD RELAY AND ADAS CONTROL UNIT

    1. Turn Ignition Switch OFF.
    2. Disconnect ADAS Control Unit connectors.
    3. Check for continuity between ICC brake hold relay harness connector and ADAS Control Unit harness connector.
      ICC brake hold relay ADAS Control Unit Continuity
      Connector Terminal Connector Terminal
      E52 1 B1 17 Existed
    4. Check for continuity between ADAS Control Unit harness connector and ground.
      ICC brake hold relay Ground Continuity
      Connector Terminal
      E52 1 Not existed

    Is the inspection result normal?

    YES 

    GO TO STEP 13. 

    NO 

    Repair the harnesses or connectors.

  13. CHECK ADAS CONTROL UNIT STANDARD VOLTAGE

    1. Connect all connectors again if the connectors are disconnected.
    2. Turn Ignition Switch ON.
    3. Perform "STOP LAMP" on "Active Test" of "ICC/ADAS", and then check the voltage between ADAS Control Unit harness connector and ground.
      Terminal Condition Voltage
      (Approx.)
      (+) (-)
      ADAS Control Unit Ground Active Test item
      "STOP LAMP"
      Connector Terminal
      B1 17 Off Battery voltage
      On 0 V

    Is the inspection result normal?

    YES 

    GO TO STEP 14. 

    NO 

    Replace ADAS Control Unit. Refer to REMOVAL AND INSTALLATION .

  14. CHECK ICC BRAKE HOLD RELAY POWER SUPPLY CIRCUIT

    1. Turn Ignition Switch OFF.
    2. Check the voltage between ICC brake hold relay harness connector and ground.
      Terminal Voltage
      (Approx.)
      (+) (-)
      ICC brake hold relay Ground
      Connector Terminal
      E52 5 Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 15. 

    NO 

    Repair or replace ICC brake hold relay power supply circuit.

  15. CHECK STOP LAMP SWITCH INPUT SIGNAL

    Check the voltage between BCM harness connector and ground.

    Terminals Voltage
    (Approx.)
    (+) (-)
    BCM Ground
    Connector Terminal
    M13 25 Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 16. 

    NO 

    Repair the harnesses or connectors.

  16. CHECK HARNESS BETWEEN ICC BRAKE HOLD RELAY AND BCM

    1. Turn Ignition Switch OFF
    2. Check for continuity between ICC brake hold relay harness connector and BCM harness connector.
      ICC brake hold relay BCM Continuity
      Connector Terminal Connector Terminal
      E52 3 M13 27 Existed
    3. Check for continuity between ICC brake hold relay harness connector and ground.
      ICC brake hold relay Ground Continuity
      Connector Terminal
      E52 3 Not existed

    Is the inspection result normal?

    YES 

    GO TO STEP 17. 

    NO 

    Repair the harnesses or connectors.

  17. CHECK ICC BRAKE HOLD RELAY

    1. Remove ICC brake hold relay.
    2. Check ICC brake hold relay. Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 18. 

    NO 

    Replace ICC brake hold relay.

  18. CHECK STOP LAMP SWITCH

    Check that "STOP LAMP SW" operate normally in "DATA MONITOR" of "ABS".

    Is the inspection result normal?

    YES 

    GO TO STEP 23. 

    NO 

    GO TO STEP 19  .

  19. CHECK STOP LAMP SWITCH INSTALLATION

    1. Turn Ignition Switch OFF.
    2. Check stop lamp Switch for correct installation. Refer to INSPECTION AND ADJUSTMENT .

    Is the inspection result normal?

    YES 

    GO TO STEP 20. 

    NO 

    Adjust stop lamp Switch installation. Refer to INSPECTION AND ADJUSTMENT .

  20. CHECK STOP LAMP SWITCH

    1. Disconnect stop lamp Switch connector.
    2. Check stop lamp Switch. Refer to COMPONENT INSPECTION (STOP LAMP SWITCH) .

    Is the inspection result normal?

    YES 

    GO TO STEP 21. 

    NO 

    Replace stop lamp Switch.

  21. CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT

    1. Connect stop lamp Switch connector.
    2. Check the voltage between stop lamp Switch harness connector and ground.
      Terminal Voltage
      (Approx.)
      (+) (-)
      Stop lamp Switch Ground
      Connector Terminal
      E57 1 Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 22. 

    NO 

    Repair or replace stop lamp Switch power supply circuit.

  22. CHECK HARNESS BETWEEN STOP LAMP SWITCH AND ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

    1. Turn the Ignition Switch OFF.
    2. Disconnect stop lamp Switch, ABS actuator and electric unit (Control Unit), and resistor connectors.
    3. Check for continuity between the stop lamp Switch harness connector and the ABS actuator and electric unit (Control Unit) harness connector.
      Stop lamp Switch ABS actuator and electric unit (Control Unit) Continuity
      Connector Terminal Connector Terminal
      E57 2 E35 5 Existed
    4. Check for continuity between stop lamp Switch harness connector and ground.
      Stop lamp Switch Ground Continuity
      Connector Terminal
      E57 2 Not existed

    Is the inspection result normal?

    YES 

    GO TO STEP 23. 

    NO 

    Repair the harnesses or connectors.

  23. PERFORM SELF-DIAGNOSIS OF BCM

    1. Connect all connectors again if the connectors are disconnected.
    2. Turn Ignition Switch ON.
    3. Perform "All DTC Reading".
    4. Check if any DTC is detected in "Self Diagnostic Result" of "BCM". Refer to DTCINDEX .

    Is any DTC detected?

    YES 

    Repair or replace the malfunctioning parts identified by the self-diagnosis result.

    NO 

    GO TO STEP 24. 

  24. PERFORM SELF-DIAGNOSIS OF ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

    1. Connect all connectors again if the connectors are disconnected.
    2. Turn Ignition Switch ON.
    3. Perform "All DTC Reading".
    4. Check if any DTC is detected in "Self Diagnostic Result" of "ABS". Refer to DTC INDEX .

    Is any DTC detected?

    YES 

    Repair or replace the malfunctioning parts identified by the self-diagnosis result.

    NO 

    Replace ADAS Control Unit. Refer to REMOVAL AND INSTALLATION .

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