LEMON Manuals: Even more car manuals for everyone
Home >> Mazda >> 2021 >> MX-5 Miata Club, Automatic Trans >> Repair and Diagnosis >> Body & Frame >> Windows >> Symptom Troubleshooting - Power Window Systems >> Driver-Side Door Glass Cannot Be Operated Manually Or Automatically >> Diagnostic Procedure

Diagnostic Procedure

DRIVER-SIDE DOOR GLASS CANNOT BE OPERATED MANUALLY OR AUTOMATICALLY (POWER WINDOW SYSTEM) DIAGNOSTIC PROCEDURE

Step Inspection Action
1 POWER WINDOW MAIN SWITCH CONNECTOR INSPECTION
  • Switch the ignition off.
  • Disconnect the negative battery cable.

    (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)

  • Disconnect the power window main switch connector.
  • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
  • Is the connector normal?
 Yes Go to the next step.
No Repair or replace the connector, then go to Step 7.
2 POWER WINDOW MOTOR (LH) CONNECTOR INSPECTION
  • Disconnect the power window motor (LH) connector.
  • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
  • Is the connector normal?
 Yes Go to the next step.
No Repair or replace the connector, then go to Step 7.
3 VERIFY IF MALFUNCTION CAUSE IS POWER WINDOW MAIN SWITCH POWER SUPPLY CIRCUIT
  • Reconnect all the disconnected connectors.
  • Connect the negative battery cable. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • Measure the voltage at the following terminals (vehicle wiring harness side).
    • Power window main switch terminal 1K
      • Power window main switch terminal 1B
  • Is the voltage B+?
 Yes Go to the next step.
No Inspect the C/U IG1 15A fuse and P.WINDOW 30A fuse.
  • If any fuse is damaged:
    • Replace the fuse.
  • If the fuses are normal:

    Refer to the wiring diagram and verify if there is a common connector between the following terminals.

    • C/U IG1 15A fuse and power window main switch terminal 1K
    • P.WINDOW 30A fuse and power window main switch terminal 1B

    If there is a common connector:

  • Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location.
    • Repair or replace the malfunctioning location.

      If there is no common connector:

    • Repair or replace the wiring harness which has an open circuit.

    Go to Step 7.
4 VERIFY IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN WIRING HARNESS BETWEEN POWER WINDOW MAIN SWITCH AND BODY GROUND
  • Disconnect the negative battery cable.

    (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)

  • Disconnect the power window main switch connector.
  • Inspect for continuity between power window main switch terminal 1A (vehicle wiring harness side) and body ground.
  • Is there continuity?
 Yes Go to the next step.
No Refer to the wiring diagram and verify if there is a common connector between power window main switch terminal 1A and body ground.
If there is a common connector:
  • Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to ground to determine the malfunctioning location.
  • Repair or replace the malfunctioning location.

    If there is no common connector:

  • Repair or replace the wiring harness which is shorted to ground.

    Go to Step 7.
5 POWER WINDOW MOTOR (LH) TERMINALS A AND G INSPECTION
  • Reconnect all the disconnected connectors.
  • Connect the negative battery cable. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • Measure the voltage at power window motor (LH) terminals A and G while operating the power window main switch.
    • Terminal G during close operation
      • Terminal A during open operation
  • Is the voltage B+?
 Yes Replace the power window motor (LH), then go to Step 7.
(See POWER WINDOW REGULATOR DISASSEMBLY/ASSEMBLY .)
No Go to the next step.
6 POWER WINDOW MAIN SWITCH TERMINALS 1D AND 1F INSPECTION Yes Refer to the wiring diagram and verify if there is a common connector between the following terminals.
  • Power window main switch terminal 1D and power window motor (LH) terminal A
  • Power window main switch terminal 1F and power window motor (LH) terminal G

    If there is a common connector:

  • Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open or short circuit to determine the malfunctioning location.
  • Repair or replace the malfunctioning location.

    If there is no common connector:

  • Repair or replace the wiring harness which has an open or short circuit.

    Go to the next step.
No Replace the power window main switch, then go to the next step.
(See POWER WINDOW MAIN SWITCH REMOVAL/INSTALLATION .)
7 VERIFY IF MALFUNCTION CAUSE IS CORRECTED
  • Does the power window system operate normally?
 Yes Troubleshooting completed. (Explain the problem to the customer.)
No Verify the malfunction symptom in the symptom troubleshooting chart and perform the other applicable malfunction diagnosis.
scientia non olet · About LEMON Manuals