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Home >> Nissan-Datsun >> 2008 >> Quest Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Component Testing >> Electrical Load Signal >> Diagnostic Procedure
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Diagnostic Procedure

  1. CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I 
    1. Turn ignition switch ON.
    2. Connect CONSULT-III and select "DATA MONITOR" mode.
    3. Select "LOAD SIGNAL" and check indication under the following conditions.
      REAR WINDOW DEFOGGER SWITCH CHECK

      Condition Indication
      Rear window defogger switch: ON ON
      Rear window defogger switch: OFF OFF

    OK or NG 

    OK: GO TO 2.

    NG: GO TO  4.

  2. CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II 

    Check "LOAD SIGNAL" indication under the following conditions.

    LIGHTING SWITCH CHECK

    Condition Indication
    Lighting switch: ON at 2nd position ON
    Lighting switch: OFF OFF

    OK or NG 

    OK: GO TO 3.

    NG: GO TO  5.

  3. CHECK HEATER FAN SIGNAL CIRCUIT OVERALL FUNCTION 

    Check "HEATER FAN SW" in "DATA MONITOR" mode with CONSULT- III under the following conditions.

    HEATER FAN CONTROL SWITCH

    Condition LOAD SIGNAL
    Heater fan control switch: ON ON
    Heater fan control switch: OFF OFF

    OK or NG 

    OK: INSPECTION END  .

    NG: GO TO  6.

  4. CHECK REAR WINDOW DEFOGGER SYSTEM 

    Refer to "REAR WINDOW DEFOGGER ".

    : INSPECTION END 

  5. CHECK HEADLAMP SYSTEM 

    Refer to "HEADLAMP (FOR USA) " or "HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM - ".

    : INSPECTION END 

  6. CHECK HEATER FAN CONTROL SYSTEM 

    Refer to "TROUBLE DIAGNOSIS " or "TROUBLE DIAGNOSIS ".

    : INSPECTION END 

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