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2008 - MX-5 - Body and Accessories

No.1 THE AUTO OPEN FUNCTION ON THE DRIVER'S AND PASSENGER'S SIDE POWER WINDOW IS INOPERATIVE [POWER WINDOW SYSTEM]



1

The auto open function on the driver's and passenger's side power window is inoperative.

POSSIBLE CAUSE

  • No power supply to power window main switch

  • Power window main switch malfunction (power window control unit malfunction, auto switch malfunction)

  • Power window motor malfunction

  • Malfunction in wiring harness between power window motor and power window main switch


NOTE:

Diagnostic procedure

STEP

INSPECTION

ACTION

1

  • Turn the ignition switch to ON position.

  • Operate driver and passenger side power window using automatic open function on the power window main switch.

  • Do each side power window open normally?

Yes

The power window system is normal.

No

    Automatic open function does not operate both sides:
  • Go to the next step.

    Automatic open function does not operate one side:
  • Go to step 4.

2

  • Turn the ignition switch to ON position.

  • Measure the voltage between power window main switch following terminal and ground.

    • Terminal 1B (power retractable hardtop model)

    • Terminal I (soft-top model)

  • Is the voltage B+?

Yes

Go to the next step.

No

Repair or replace for open circuit.

3

  • Turn the ignition switch to LOCK position.

  • Disconnect the power window main switch connector.

  • Verify that the continuity between following power window main switch terminal and ground.

    • Terminal 1G (power retractable hardtop model)

    • Terminal J (soft-top model)

  • Is there continuity?

Yes

Inspect the power window main switch.

(See POWER WINDOW MAIN SWITCH INSPECTION.)

(See POWER WINDOW MAIN SWITCH INSPECTION[POWER RETRACTABLE HARDTOP].)

Replace the power window main switch if necessary.

No

Repair or replace for open circuit.

4

  • Turn the ignition switch to ON position.

  • Operate suspected side power window using manual open function on the power window main switch.

  • Do suspected side power window open normally?

Yes

Replace the power window main switch. (power window control unit malfunction)

(See POWER WINDOW MAIN SWITCH REMOVAL/INSTALLATION.)

No

Go to the next step.

5

  • Turn the ignition switch to LOCK position.

  • Disconnect the power window main switch and suspected side power window motor connector.

  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion etc.)

  • Is there any malfunction?

Yes

Go to the next step.

No

Repair or replace malfunctioning part.

6

  • Inspect for open or short circuit in wiring harness between suspected side power window motor and power window main switch.

    • Power retractable hardtop model driver's side:
    • Terminal 1I (main switch)—terminal G (motor)

    • Terminal 1J (main switch)—terminal A (motor)

      Power retractable hardtop model passenger's side:
    • Terminal 1D (main switch)—terminal G (motor)

    • Terminal 1F (main switch)—terminal A (motor)

      Soft-top model driver's side:
    • Terminal G (main switch)—terminal G (motor)

    • Terminal B (main switch)—terminal A (motor)

      Soft-top model passenger's side:
    • Terminal A (main switch)—terminal G (motor)

    • Terminal D (main switch)—terminal A (motor)

  • Is the open or short circuit detected?

Yes

Repair or replace for open or short circuit.

No

Go to the next step.

7

Yes

Replace the power window main switch. (power window control unit malfunction, auto switch malfunction)

(See POWER WINDOW MAIN SWITCH REMOVAL/INSTALLATION.)

No

Replace the power window motor.

(See POWER WINDOW REGULATOR REMOVAL/INSTALLATION.)




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