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Nissan Sentra B18 (2020-2025) Service Manual: C1f03-72 Stop Lamp Relay

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition
 

C1F03

72

STOP LAMP RLY FIX

(Stop lamp relay fixation)

Diagnosis condition

  • When engine is running

  • When AEB system is ON

Signal (terminal)

—

Threshold

Stop lamp inactive state despite the outputting of a stop lamp request signal from ADAS control unit 2

Diagnosis delay time

1 second or less

POSSIBLE CAUSE

  • BCM

  • ADAS control unit 2

FAIL-SAFE

The following systems are canceled.

  • Nissan Sentra Vehicle-to-vehicle distance control mode

  • Conventional (fixed speed) cruise control mode

  • AEB

  • RAB

Confirmation Procedure

Confirmation Procedure

  1. CHECK DTC PRIORITY

    If DTC “C1F03-72” is displayed with Network-DTC, first diagnose the Network-DTC.

    Is applicable DTC detected?

    YES >>

    Perform diagnosis of applicable. DTC Index

    NO >>

    GO TO 2 .

  2. PERFORM DTC CONFIRMATION PROCEDURE

    1. Start the engine.

    2. Turn the AEB system ON

    3. Perform “All DTC Reading”.

    4. Check if the “C1F03-72” is detected as the current malfunction in the “Self Diagnostic Result” of “ICC/ADAS 2”.

    Is “C1F03-72” detected as the current malfunction?

    YES >>

    DTC Diagnosis Procedure

    NO-1 >>

    To check malfunction symptom before repair: Intermittent Incident

    NO-2 >>

    Confirmation after repair: INSPECTION END

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK DTC PRIORITY

    If DTC “C1F03-72” is displayed with Network-DTC, first diagnose the Network-DTC.

    Is applicable DTC detected?

    YES >>

    Perform diagnosis of applicable. DTC Index

    NO >>

    GO TO 2.

  2. PERFORM SELF-DIAGNOSIS OF BCM

    Check if any DTC is detected in “Self Diagnostic Result” of “BCM”.

    Is any DTC detected?

    YES >>

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

    NO >>

    Replace ADAS control unit 2. Removal and Installation

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