Power Window Motor Inspection: Driver-side

WARNING: This page is about a different car, the 2016 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
Remove the door trim. (Driver-side) (See DOOR TRIM REMOVAL/INSTALLATION .)
Disconnect the power window motor connector.

Apply battery positive voltage and connect the ground to power window motor terminals G and A, and then inspect the power window motor operation.

B+ Terminal	Ground Terminal	Operation
G	A	Close
A	G	Open

Fig 1: Inspecting Power Window Motor Operation

Courtesy of MAZDA MOTORS CORP.

If the power window motor does not operate as indicated in the table, replace it. (See POWER WINDOW REGULATOR DISASSEMBLY/ASSEMBLY .)

Connect the battery positive voltage to power window motor terminal D and connect terminal H to ground.
Operate the power window motor and verify the wave patterns for terminals B and F.

Fig 2: Power Window Motor Terminals Wave Pattern
Courtesy of MAZDA MOTORS CORP.
- Terminal:
  B(+), F(+) ↔ ground (-)
- Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range
- If the malfunction, replace the power window motor. (See POWER WINDOW REGULATOR DISASSEMBLY/ASSEMBLY .)