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Encoder And Limit Switch Check

  1. CHECK DOOR WINDOW SLIDE MECHANISM 

    Check the following.

    Obstacles in window, glass molding, etc.

    Worn or deformed glass molding

    Door sash tilted too far inward or outward

    Door window regulator

    OK or NG 

    1. OK: GO TO 2.
    2. NG: Remove obstacles or repair door window slide mechanism.
  2. CHECK POWER SUPPLY TO LIMIT SWITCH 
    1. Disconnect front power window regulator LH or RH harness connector.
    2. Check voltage between front power window main switch terminal 15 or front power window switch RH terminal 16 and ground.
    Fig 1: Checking Power Supply To Limit Switch
    G03145180
    NOTE: Check voltage when front power window regulator LH or RH harness connector is disconnected.

    OK or NG 

    1. OK: GO TO 3.
    2. NG: Replace power window main switch or front power window switch RH.
  3. CHECK LIMIT SWITCH OPERATION 
    1. Connect front power window regulator LH or RH harness connector.
    2. Check voltage between front power window main switch terminal 15 or front power window switch RH terminal 16 and ground during power window closing operation.
    Fig 2: Checking Limit Switch Operation
    G03145181
    FRONT POWER WINDOW MAIN SWITCH TERMINAL CONTINUITY CHECK

    Terminal No. Condition Voltage (DCV)
    Front power window main switch: 15 Front power window switch RH: 16 Approx 15 mm (0.59 in) below the full closed position to full closed position Approx. 5
    Other positions Approx. 0

    OK or NG 

    1. OK: GO TO  5 .
    2. NG: GO TO 4.
  4. RESET LIMIT SWITCH 

    Reset limit switch. Then check voltage between front power window main switch terminal 15 or front power window switch RH terminal 16 and ground during power window closing operation at least ten times.

    Fig 3: Checking Reset Limit Switch
    G03145182
    FRONT POWER WINDOW MAIN SWITCH TERMINAL VOLTAGE CHECK

    Terminal No. Condition Voltage (DCV)
    Front power window main switch: 15 Front power window switch RH: 16 Approx 15 mm (0.59 in) below the full closed position to full closed position Approx. 5
    Other positions Approx. 0

    OK or NG 

    1. OK: GO TO 5.
    2. NG: Replace power window regulator motor.
  5. CHECK ENCODER 

    Measure voltage between front power window main switch terminal 14 or front power window switch RH terminal 19 and ground with oscilloscope when power window is in automatic closing operation.

    Fig 4: Checking Encoder
    G03145183

    OK or NG 

    1. OK: Replace power window main switch.
    2. NG: Replace power window regulator motor.
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