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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 995 (Brake Control System (VDC/TCS/Abs)) >> Component Diagnosis >> C1116 Stop Lamp SW >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CONNECTOR INSPECTION
    1. Disconnect stop lamp switch connector and ABS actuator and electric unit (control unit) connector.
    2. Check terminals for deformation, disconnection, looseness or damage.

    Is the inspection result normal? 

    YES: GO TO 2

    NO: Repair or replace as necessary.

  2. CHECK STOP LAMP SWITCH CIRCUIT
    1. Connect stop lamp switch connector.
    2. Check voltage between ABS actuator and electric unit (control unit) connector E26 terminal 20 and ground.
    TERMINAL VOLTAGE REFERENCE

    ABS actuator and electric unit (control unit) Ground Condition Voltage (Approx.)
    Connector Terminal
    E26 20 - Brake pedal depressed Battery voltage
    Brake pedal released 0 V
    Fig 1: Checking Voltage Between ABS Actuator And Electric Unit Connector E26 Terminal 20 And Ground
    G04887271Courtesy of NISSAN MOTOR CO., U.S.A.

    Is the inspection result normal? 

    YES: Replace ABS actuator and electric unit (control unit). Refer to "REMOVAL AND INSTALLATION ".

    NO: GO TO 3

  3. CHECK STOP LAMP SWITCH CIRCUIT FOR OPEN
    1. Disconnect stop lamp switch connector.
    2. Check continuity between ABS actuator and electric unit (control unit) connector E26 (A) terminal 20 and stop lamp switch connector E38 (B) terminal 4.
    TERMINAL CONTINUITY REFERENCE

    ABS actuator and electric unit (control unit) stop lamp switch Continuity
    Connector Terminal Connector Terminal
    E26 (A) 20 E38 (B) 4 Yes
    Fig 2: Checking Continuity Between ABS Actuator And Electric Unit And Stop Lamp Switch Connector Terminals
    G05870122Courtesy of NISSAN MOTOR CO., U.S.A.

    Is the inspection result normal? 

    YES: GO TO 4.

    NO: Repair or replace as necessary.

  4. CHECK STOP LAMP SWITCH CIRCUIT FOR SHORT

Check continuity between ABS actuator and electric unit (control unit) connector E26 terminal 20 and ground.

TERMINAL CONTINUITY REFERENCE

ABS actuator and electric unit (control unit) Ground Continuity
Connector Terminal
E26 20 - No
Fig 3: Checking Continuity Between ABS Actuator And Electric Unit Connector E26 Terminal 20 And Ground
G05870123Courtesy of NISSAN MOTOR CO., U.S.A.

Is the inspection result normal? 

YES: Replace stop lamp switch.

NO: Repair harness or connectors.

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