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2008 - MX-5 - Body and Accessories

No.3 THE PASSENGER'S SIDE POWER WINDOW IS INOPERATIVE [POWER WINDOW SYSTEM]



3

The passenger's side power window is inoperative.

POSSIBLE CAUSE

  • Power supply circuit malfunction

    • Open or short circuit in wiring harness between power window main switch and passenger's side power window motor

  • Power window main switch malfunction

  • The passenger's side power window motor malfunction

  • The passenger's side power window regulator malfunction


Diagnostic procedure

STEP

INSPECTION

ACTION

1

  • Turn the ignition switch to the ON position.

  • Operate the driver's side power window using the power window main switch.

  • Does the power window operate properly?

Yes

Go to the next step.

No

Go to the symptom “No.4 ALL POWER WINDOWS ARE INOPERATIVE” troubleshooting procedure.

2

  • Measure the voltage at the power window main switch (power window motor output terminal) while operating the passenger’s side power window using the power window main switch.

  • Is the voltage B+?

    • Power retractable hardtop model:
    • Open: terminal 1F/close: terminal 1D

      Soft-top model:
    • Open: terminal D/close: terminal A

Yes

Go to the next step.

No

Replace the power window main switch.

(See POWER WINDOW MAIN SWITCH REMOVAL/INSTALLATION.)

3

  • Measure the voltage at the power window motor (battery power supply terminal) while operating the passenger's side power window using the power window main switch.

  • Is the voltage B+?

    (Open: terminal A/close: terminal G)

Yes

Go to the next step.

No

Inspect for an open or short circuit in the wiring harness between the power window main switch and the power window motor.

Inspect the power window main switch and power window motor connector connections. (damage/pulled-out pins, corrosion)

Repair or replace as necessary.

4

  • Operate the passenger's side power window using the power window main switch.

  • Does the power window motor operate (rotate)?

CAUTION:

  • If the power window motor temperature is high, the motor may not rotate due to the motor internal bimetal function. Leave it untouched for about 3 min to cool it, then reinspect.

Yes

Go to the next step.

No

Replace the power window motor.

(See POWER WINDOW REGULATOR REMOVAL/INSTALLATION.)

5

  • Remove the door glass from carrier plate.

  • Make sure that the door glass moves smoothly using your hand.

  • Does the door glass move smoothly?

Yes

Replace the power window regulator.

(See POWER WINDOW REGULATOR REMOVAL/INSTALLATION.)

No

Inspect for a bent regulator guide or other possible malfunction.

If normal, replace the door glass run-channel.




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