Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Power Window Control System
This system uses the multiplex communication system, so check diagnosis system of the multiplex communication system before you proceed with troubleshooting. Refer to MULTIPLEX COMMUNICATION SYSTEM .
| Symptom | Suspect Area | Action |
|---|---|---|
| All the power windows do not operate. (Power Door Lock System is normal.) |
1. PWS terminal circuit | PWS CIRCUIT |
| 2. Power Window Master Switch | - | |
| 3. Wire Harness | POWER WINDOW CONTROL SYSTEM | |
| 4. Driver Door ECU | DRIVER DOOR CONTROL SYSTEM (DIAGNOSTICS) | |
| 5. Body No. 1 ECU | BODY ECU NO. 1 CONTROL SYSTEM OPERATION CHECK | |
| Only the driver's window does not operate. | 1. Power Window Master Switch | POWER WINDOW CONTROL SYSTEM |
| 2. Power Window Switch | POWER WINDOW CONTROL SYSTEM | |
| 3. Power Window Motor | POWER WINDOW CONTROL SYSTEM | |
| 4. Wire Harness | - | |
| "Window lock function" does not operate. | 1. Power Window Master Switch | POWER WINDOW CONTROL SYSTEM |
| Window does not operate with power window master switch. (Manual or Automatic operation can be performed.) |
TROUBLESHOOTING NO. 1 | POWER WINDOW CONTROL SYSTEM |
| Remote control of all windows (Except driver's) does not functions with master switch. (Windows operate normally with each of master switch.) |
TROUBLESHOOTING NO. 2 | POWER WINDOW CONTROL SYSTEM |
| The Key related power window operations does not operate with driver side door key cylinder. (Master switch operation is normal.) |
TROUBLESHOOTING NO. 3 | POWER WINDOW CONTROL SYSTEM |
| Power window does not operate with multi-function transmitter. (Windows operate normally with master switch.) |
TROUBLESHOOTING NO. 4 | POWER WINDOW CONTROL SYSTEM |
| Window moves down without being ordered during the up operation. | TROUBLESHOOTING NO. 5 | POWER WINDOW CONTROL SYSTEM |
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.