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Home >> Infiniti >> 2017 >> QX70 RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 211 (Brake Control System (Diagnostic Trouble Codes (DTCS) C1AC0-U1511 And Circuit Diagnosis) (Hybrid)) >> DTC / Circuit Diagnosis >> Door Switch Circuit >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.

  1. CHECK POWER AND GROUND CIRCUITS OF ELECTRICALLY-DRIVEN INTELLIGENT BRAKE UNIT

    Perform diagnosis of electrically-driven intelligent brake unit power and ground circuits. Refer to DIAGNOSIS PROCEDURE .

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Repair or replace error-detected parts.

  2. CHECK DATA MONITOR

    G-20 With CONSULT

    1. Turn the ignition switch OFF to ON without depressing the brake pedal.
      CAUTION:

      Never set the vehicle to READY/Never start the engine.

    2. Repeat step 4 two times or more.
      CAUTION:

      Be sure to wait for 5 seconds or more after turning the ignition switch OFF.

    3. Start CONSULT and select "BCM" and "DATA MONITOR" according this order.
    4. Check following monitor item. Refer to REFERENCE VALUE .
      • "DOOR STAT - DR"
      • "DOOR STAT - AS"
      • "DOOR STAT - RR"
      • "DOOR STAT - RL"
      • "BK DOOR STAT"

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    GO TO STEP 3  .

  3. PERFORM BCM SELF-DIAGNOSIS

    G-20 With CONSULT

    Start CONSULT and perform self-diagnosis for "BCM".

    Is DTC detected?

    YES 

    Check the DTC. Refer to DTC INDEX .

    NO 

    GO TO STEP 4  .

  4. PERFORM ELECTRICALLY-DRIVEN INTELLIGENT BRAKE UNIT SELF-DIAGNOSIS

    G-20 With CONSULT

    Start CONSULT and perform self-diagnosis for "BRAKE".

    Is DTC "U1000" detected?

    YES 

    Refer to TROUBLE DIAGNOSIS FLOW CHART .

    NO 

    INSPECTION END