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DRIVER-SIDE DOOR GLASS CAN BE OPERATED MANUALLY BUT CANNOT BE OPERATED AUTOMATICALLY [POWER WINDOW SYSTEM]

Description

Driver-side door glass cannot be operated automatically but can be operated manually using power window main switch

Possible Causes

  • Power window system initial setting not completed

  • Power window main switch malfunction

  • Power window motor (LH) malfunction

  • Open circuit in wiring harness between the following terminals:

    • Power window main switch terminal 2D and Power window motor (LH) terminal B

    • Power window main switch terminal 1C and Power window motor (LH) terminal H

    • Power window main switch terminal 2F and Power window motor (LH) terminal F

    • Power window main switch terminal 1G and Power window motor (LH) terminal D

  • Short to ground in wiring harness between the following terminals:

    • Power window main switch terminal 2D and Power window motor (LH) terminal B

    • Power window main switch terminal 2F and Power window motor (LH) terminal F

    • Power window main switch terminal 1G and Power window motor (LH) terminal D

  • Short to power supply in wiring harness between the following terminals:

    • Power window main switch terminal 2D and Power window motor (LH) terminal B

    • Power window main switch terminal 2F and Power window motor (LH) terminal F

  • Connector poor contact or terminal damage

Diagnostic Procedure

Step

Inspection

Action

1
    VERIFY IF MALFUNCTION CAUSE IS OPERATION UNDER OPERATION PERMISSION CONDITION

  • Perform the power window system initialization procedure.

  • Does the driver-side door glass operate automatically using the power window main switch?

Yes

System is normal. (Tell the customer about power window system initialization procedure.)

No

Go to the next step.

2
    POWER WINDOW MAIN SWITCH CONNECTOR INSPECTION

  • Switch the ignition off.

  • Disconnect the negative battery cable.

    (See NEGATIVE BATTERY CABLE 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 10.

3
    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 10.

4
    POWER WINDOW MOTOR (LH) TERMINAL D INSPECTION

  • Reconnect all the disconnected connectors.

  • Connect the negative battery cable.

    (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

  • Measure the voltage at the power window motor (LH) terminal D (vehicle wiring harness side).

  • Is the voltage B+?

Yes

Go to Step 6.

No

Go to the next step.

5
    POWER WINDOW MAIN SWITCH TERMINAL 1G INSPECTION

  • Measure the voltage at power window main switch terminal 1G (vehicle wiring harness side).

  • Is the voltage B+?

Yes

Refer to the wiring diagram and verify if there is a common connector between power window main switch terminal 1G and power window motor (LH) terminal D.

    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 Step 10.

No

Replace the power window main switch, then go to Step 10.

(See POWER WINDOW MAIN SWITCH REMOVAL/INSTALLATION.)

6
    DETERMINE IF MALFUNCTION CAUSE IS POWER WINDOW MAIN SWITCH INTERNAL GROUND SYSTEM

  • Disconnect the negative battery cable.

    (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

  • Inspect for continuity between power window motor (LH) terminal H (vehicle wiring harness side) and body ground.

  • Is there continuity?

Yes

Go to Step 8.

No

Go to the next step.

7
    VERIFY IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN WIRING HARNESS BETWEEN POWER WINDOW MAIN SWITCH AND POWER WINDOW MOTOR (LH)

  • Disconnect the power window main switch connector and power window motor (LH) connector.

  • Inspect for continuity between the following terminals (vehicle wiring harness).

    • Power window main switch terminal 1C and power window motor (LH) terminal H

  • Is there continuity?

Yes

Replace the power window main switch, then go to Step 10.

(See POWER WINDOW MAIN SWITCH REMOVAL/INSTALLATION.)

No

Refer to the wiring diagram and verify if there is a common connector between power window main switch terminal 1C and power window motor (LH) terminal H.

    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 10.

8
    POWER WINDOW MAIN SWITCH TERMINALS 2F AND 2D INSPECTION

  • Reconnect all the disconnected connectors.

  • Connect the negative battery cable.

    (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

  • Switch the ignition ON (engine off or on).

  • Operate the driver-side power window to measure the pulse at power window main switch terminals 2F and 2D.

  • Measure the pulse at power window main switch terminals 2F and 2D.

    (See Inspection Using an Oscilloscope.)

  • Is the pulse normal?

Yes

NOTE:

  • The power window motor (LH) is normal because the pulse sent from the power window motor (LH) to the power window main switch is normal.

Replace the power window main switch, then go to Step 10.

(See POWER WINDOW MAIN SWITCH REMOVAL/INSTALLATION.)

No

Go to the next step.

9
    POWER WINDOW MOTOR (LH) TERMINALS B AND F INSPECTION

  • Operate the driver-side power window to measure the pulse at power window motor (LH) terminals B and F.

    (See Inspection Using an Oscilloscope.)

  • Is the pulse normal?

Yes

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

  • Power window main switch terminal 2D and power window motor (LH) terminal B

  • Power window main switch terminal 2F and power window motor (LH) terminal F

    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 motor (LH), then go to the next step.

(See POWER WINDOW REGULATOR DISASSEMBLY/ASSEMBLY.)

10
    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.

Inspection Using an Oscilloscope

  • Power window main switch: 2D (+), 2F (+) ??? ground (-)

  • Power window motor (LH): B (+), F (+) ??? ground (-)

  • Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range

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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5

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