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Home >> Infiniti >> 2006 >> FX45 >> Repair and Diagnosis >> Transmission >> Automatic Transmission >> Brake Signal Circuit >> Diagnostic Procedure

Diagnostic Procedure

  1. CHECK CAN COMMUNICATION LINE 

    Perform the self-diagnosis. Refer to "SELF-DIAGNOSTIC RESULT MODE ", "DIAGNOSTIC PROCEDURE WITHOUT CONSULT-II ".

    Is a malfunction in the CAN communication indicated in the results?

    YES : Check CAN communication line. Refer to "DTC U1000 CAN COMMUNICATION LINE ".

    NO : GO TO 2.

  2. CHECK STOP LAMP SWITCH CIRCUIT 

    With CONSULT-II 

    1. Turn ignition switch ON. (Do not start engine.)
    2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.
    3. Read out ON/OFF switching action of the "BRAKE SW".
      DATA MONITOR REFERENCE CHART

      Item name Condition Display value
      BRAKE SW Depressed brake pedal. ON
      Released brake pedal. OFF

    OK or NG 

    OK : INSPECTION END 

    NG : GO TO 3.

    Fig 1: CONSULT II Display - Data Monitor
    G04075499Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK STOP LAMP SWITCH 

    Check continuity between stop lamp switch harness connector E210 terminals 1 and 2. Refer to "WIRING DIAGRAM - AT - NONDTC ".

    TERMINALS CONTINUITY CHART

    Condition Continuity
    When brake pedal is depressed Yes
    When brake pedal is released No

    Check stop lamp switch after adjusting brake pedal - refer to " BRAKE PEDAL  "  .

    OK or NG 

    OK : Check the following items. If NG, repair or replace damaged parts.

    • Harness for short or open between battery and stop lamp switch.
    • Harness for short or open between stop lamp switch and unified meter and A/C amp.

    NG : Repair or replace the stop lamp switch.

    Fig 2: Checking Continuity Between Stop Lamp Switch Harness Connector E210 Terminals 1 And 2
    G04075559Courtesy of NISSAN MOTOR CO., U.S.A.