Nissan Rogue (T33) 2021-Present Service Manual: P1572 Ascd Brake Switch

Nissan Rogue (T33) 2021-Present Service Manual / Engine :: Engine Control System / Kr15ddt :: Dtc/circuit Diagnosis / P1572 Ascd Brake Switch

DTC Description

DTC DETECTION LOGIC

DTC

CONSULT screen terms

(Trouble diagnosis content) 		DTC detection condition
P1572 00

ASCD BRAKE SW

(ASCD brake switch) 		Diagnosis condition Selector lever Suitable position and engine run
Signal (terminal) Stop lamp switch signal
Threshold Stop lamp switch signal is not sent to ECM for extremely long time
Diagnosis delay time —

POSSIBLE CAUSE

  • Harness or connectors

    (Stop lamp switch circuit is shorted.)

  • Stop lamp switch

  • Incorrect stop lamp switch installation

  • ECM

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

CHECK DTC PRIORITY

If DTC P1572 is displayed with other DTC, first perform the trouble diagnosis for other DTC.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index.

NO>>

GO TO 2.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

  1. Turn ignition switch OFF and wait at least 10 seconds.

  2. Turn ignition switch ON.

  3. Turn ignition switch OFF and wait at least 10 seconds.

>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE 1

  1. Start engine.

  2. Press MAIN switch and make sure that CRUISE indicator is displayed in combination meter.

  3. Drive the Nissan Ariya vehicle for at least 5 consecutive seconds as per the following conditions.

    CAUTION:

    Always drive Nissan Ariya vehicle at a safe speed.

    NOTE:

    This procedure may be conducted with the drive wheels lifted in the shop or by driving the Nissan Ariya vehicle. If a road test is expected to be easier, it is unnecessary to lift the vehicle.

    Nissan Ariya Vehicle speed More than 30 km/h (19 mph)
    Selector lever Suitable position

  4. Check DTC.

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

GO TO 4.

PERFORM DTC CONFIRMATION PROCEDURE 2

  1. Drive the Nissan Ariya vehicle for at least 5 consecutive seconds as per the following conditions.

    CAUTION:

    Always drive Nissan Ariya vehicle at a safe speed.

    NOTE:

    This procedure may be conducted with the drive wheels lifted in the shop or by driving the Nissan Ariya vehicle. If a road test is expected to be easier, it is unnecessary to lift the vehicle.

    Nissan Ariya Vehicle speed More than 30 km/h (19 mph)
    Selector lever Suitable position
    Driving location Depress the brake pedal for more than five seconds so as not to come off from the above-mentioned Nissan Ariya vehicle speed.

  2. Check DTC.

Is DTC detected?

YES>>

Proceed to DTC Diagnosis Procedure.

NO-1>>

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

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

CHECK DTC PRIORITY

If DTC P1572 is displayed with other DTC, first perform the trouble diagnosis for other DTC.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index.

NO>>

GO TO 2.

CHECK OVERALL FUNCTION-1

With CONSULT

  1. Turn ignition switch ON.

  2. Select “BRAKE SW1” and “BRAKE SW2” in “DATA MONITOR” mode of “ENGINE” using CONSULT.

  3. Check “BRAKE SW1” and “BRAKE SW2” indication as per the following conditions.

    Monitor item Condition Indication
    BRAKE SW1 Brake pedal Slightly depressed OFF
    Fully released ON
    BRAKE SW2 Brake pedal Slightly depressed ON
    Fully released OFF

Without CONSULT

  1. Turn ignition switch ON.

  2. Check the voltage between ECM harness connector terminals as per the following.

    ECM Condition

    Voltage

    (Approx.)
    Connector + –
    Terminal
    E21 148 160 Brake pedal Slightly depressed 0 V
    Fully released Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 4.

CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT

  1. Turn ignition switch OFF.

  2. Disconnect stop lamp switch harness connector.

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

    + − Voltage
    Stop lamp switch
    Connector Terminal
    E38 4 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Perform the trouble diagnosis for power supply circuit.

CHECK STOP LAMP SWITCH

Check the stop lamp switch. Refer to Component Inspection.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Replace stop lamp switch. Refer to Exploded View (Without ProPILOT Assist 2.1) or Exploded View (With ProPILOT Assist 2.1).

CHECK STOP LAMP SWITCH SIGNAL CIRCUIT

  1. Disconnect ECM harness connector.

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

    + − Continuity
    Stop lamp switch ECM
    Connector Terminal Connector Terminal
    E38 3 E21 148 Existed

  3. Also check harness for short to ground and to power.

Is the inspection result normal?

YES>>

Check intermittent incident. Refer to Intermittent Incident.

NO>>

Repair or replace error-detected parts

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