Nissan Murano: Icc/adas (adas Control Unit) / C1a13-23 Stop Lamp Rly Fix

Nissan Murano (Z52) 2015-2024 Service Manual / Cruise Control & Driver Assistance / Driver Assistance System :: Adas Control Unit / Dtc/circuit Diagnosis / Icc/adas (adas Control Unit) / C1a13-23 Stop Lamp Rly Fix

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen items

(Trouble diagnosis content) 		DTC detection condition
C1A13-23

STOP LAMP RLY FIX

(Stop lamp relay fix) 		Diagnosis condition When engine is running
Signal (terminal) —
Threshold Stop lamp inactive state continues despite the outputting of an ADAS control unit stop lamp request signal
Diagnosis delay time 1 second or more

POSSIBLE CAUSE

  • Stop lamp switch circuit

  • Stop lamp switch

  • Incorrect stop lamp switch installation

  • ICC brake hold relay

  • ICC brake hold relay circuit

  • ADAS control unit

  • ECM

FAIL-SAFE

The following systems are canceled:

  • Vehicle-to-vehicle distance control mode

  • Conventional (fixed speed) cruise control mode

  • Automatic Emergency Braking (AEB) with pedestrian detection

  • Automatic Emergency Braking (AEB)

  • Intelligent Forward Collision Warning (I-FCW)

  • Rear Automatic Braking (RAB)

Confirmation Procedure

CHECK DTC PRIORITY

If DTC “C1A13–23” is displayed with DTC “U1000–01”, first diagnose the DTC “U1000–01”.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Description.

NO>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE (1)

CONSULT

  1. Start the engine.

  2. Perform the active test item “STOP LAMP”.

  3. Perform “All DTC Reading”.

  4. Check if the “C1A13–23” is detected as the current malfunction in the “Self Diagnostic Result” of “ICC/ADAS”.

Is “C1A13–23” detected as the current malfunction?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE (2)

CONSULT

  1. Drive at the Nissan Murano vehicle speed of 40 km/h (25 MPH) or more for approximately 20 seconds or more without the brake pedal depressed.

    CAUTION:

    Always drive safely.

    NOTE:

    If it is outside the above condition, repeat step 1.

  2. Perform “All DTC Reading”.

  3. Check if the “C1A13–23” is detected as the current malfunction in the “Self Diagnostic Result” of “ICC/ADAS”.

Is “C1A13–23” detected as the current malfunction?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: Inspection End

DTC Diagnosis Procedure

CHECK DTC PRIORITY

If DTC “C1A13–23” is displayed with DTC “U1000–01”, first diagnose the DTC “U1000–01”.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Description.

NO>>

GO TO 2.

CHECK STOP LAMP SWITCH

CONSULT

  1. Select “Data Monitor” mode of “ICC/ADAS”.

  2. Select “STOP LAMP SW”.

  3. Check that the function operates normally according to the following conditions:

Monitor item Condition Status
STOP LAMP SW When brake pedal is applied ON
When brake pedal is released OFF

Is the inspection result normal?

YES>>

GO TO 10.

NO>>

GO TO 3.

CHECK STOP LAMP SWITCH INSTALLATION

  1. Turn ignition switch OFF.

  2. Check stop lamp switch for correct installation. Refer to Inspection.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Adjust stop lamp switch installation. Refer to Adjustment.

CHECK STOP LAMP SWITCH

Check stop lamp switch. Refer to Component Inspection (Stop Lamp Switch).

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Replace stop lamp switch. Refer to Exploded View.

CHECK STOP LAMP FOR ILLUMINATION

  1. Remove ICC brake hold relay.

  2. 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 6.

NO>>

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

CHECK HARNESS BETWEEN STOP LAMP SWITCH AND ECM

  1. Turn the ignition switch OFF.

  2. Disconnect stop lamp switch, ECM, rear combination lamp, and high-mounted stop lamp connectors.

  3. Check for continuity between the stop lamp switch harness connector and the ECM harness connector.

    Stop lamp switch ECM Continuity
    Connector Terminal Connector Terminal
    E38 2 E32 139 Yes

  4. Check for continuity between stop lamp switch harness connector and ground.

    Stop lamp switch Ground Continuity
    Connector Terminal
    E38 2 No

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Repair the harnesses or connectors.

CHECK ICC BRAKE HOLD RELAY CIRCUIT

  1. Connect ICC brake hold relay, ECM, rear combination lamp, and high-mounted stop lamp connectors.

  2. Check that the stop lamp does not illuminate when brake pedal is not depressed.

Is the inspection result normal?

YES>>

GO TO 9.

NO>>

GO TO 8.

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 9.

NO>>

Replace ICC brake hold relay.

PERFORM SELF-DIAGNOSIS OF ECM

CONSULT

  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 “ENGINE”. 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.

CHECK ICC BRAKE HOLD RELAY POWER SUPPLY CIRCUIT

  1. Turn ignition switch OFF.

  2. Remove ICC brake hold relay.

  3. Check the voltage between ICC brake hold relay harness connector and ground.

    Terminal

    Voltage

    (Approx.)
    (+) (–)
    ICC brake hold relay Ground
    Connector Terminal
    E75 2 Battery voltage

Is the inspection result normal?

YES>>

GO TO 11.

NO>>

Repair or replace ICC brake hold relay power supply circuit.

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

  1. Disconnect ADAS control unit connectors.

  2. 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
    E75 1 M182 4 Yes

  3. Check for continuity between ICC brake hold relay harness connector and ground.

    ICC brake hold relay Ground Continuity
    Connector Terminal
    E75 1 No

Is the inspection result normal?

YES>>

GO TO 12.

NO>>

Repair the harnesses or connectors.

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
    E75 5 Battery voltage

Is the inspection result normal?

YES>>

GO TO 13.

NO>>

Repair or replace ICC brake hold relay power supply circuit.

CHECK HARNESS BETWEEN ICC BRAKE HOLD RELAY AND ECM

  1. Disconnect ECM, rear combination lamp, and high-mounted stop lamp connectors and remove ICC brake hold relay.

  2. Check for continuity between ICC brake hold relay harness connector and ECM harness connector.

    ICC brake hold relay ECM Continuity
    Connector Terminal Connector Terminal
    E75 3 E32 139 Yes

  3. Check for continuity between ICC brake hold relay harness connector and ground.

    ICC brake hold relay Ground Continuity
    Connector Terminal
    E75 3 No

Is the inspection result normal?

YES>>

GO TO 14.

NO>>

Repair the harnesses or connectors.

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 15.

NO>>

Replace ICC brake hold relay.

CHECK STOP LAMP SWITCH

CONSULT

  1. Select “Data Monitor” mode of “ICC/ADAS”.

  2. Select “STOP LAMP SW”.

  3. Check that the function operates normally according to the following conditions:

Monitor item Condition Status
STOP LAMP SW When brake pedal is applied ON
When brake pedal is released OFF

Is the inspection result normal?

YES>>

GO TO 20.

NO>>

GO TO 16.

CHECK STOP LAMP SWITCH INSTALLATION

Check stop lamp switch for correct installation. Refer to Inspection.

Is the inspection result normal?

YES>>

GO TO 17.

NO>>

Adjust stop lamp switch installation. Refer to Adjustment.

CHECK STOP LAMP SWITCH

Check stop lamp switch. Refer to Component Inspection (Stop Lamp Switch).

Is the inspection result normal?

YES>>

GO TO 18.

NO>>

Replace stop lamp switch. Refer to Exploded View.

CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT

Check the voltage between stop lamp switch harness connector and ground.

with ICC
Terminal

Voltage

(Approx.)
(+) (–)
Stop lamp switch Ground
Connector Terminal
E38 3 Battery voltage
without ICC
Terminal

Voltage

(Approx.)
(+) (–)
Stop lamp switch Ground
Connector Terminal
E38 1 Battery voltage

Is the inspection result normal?

YES>>

GO TO 19.

NO>>

Repair or replace stop lamp switch power supply circuit.

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 and ABS actuator and electric unit (control unit).

  3. Check for continuity between the stop lamp switch harness connector and the ABS actuator and electric unit (control unit) harness connector.

    with ICC
    Stop lamp switch ABS actuator and electric unit (control unit) Continuity
    Connector Terminal Connector Terminal
    E38 4 E130 7 Yes
    without ICC
    Stop lamp switch ABS actuator and electric unit (control unit) Continuity
    Connector Terminal Connector Terminal
    E38 2 E125 30 Yes

  4. Check for continuity between stop lamp switch harness connector and ground.

    with ICC
    Stop lamp switch Ground Continuity
    Connector Terminal
    E38 4 No
    without ICC
    Stop lamp switch Ground Continuity
    Connector Terminal
    E38 2 No

Is the inspection result normal?

YES>>

GO TO 20.

NO>>

Repair the harnesses or connectors.

PERFORM SELF-DIAGNOSIS OF ECM

CONSULT

  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 “ENGINE”. Refer to DTC Index.

Is any DTC detected?

YES>>

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

NO>>

GO TO 21.

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

CONSULT

  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.

Component Inspection

CHECK ICC BRAKE HOLD RELAY

Apply battery voltage to ICC brake hold relay terminals 1 and 2, and then check for continuity under the following conditions.

Terminal Condition Continuity
3 5 When the battery voltage is applied Yes
When the battery voltage is not applied No

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Replace ICC brake hold relay.

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