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 - Diagnosis: Pre-Check
- INSPECT POWER WINDOW OPERATION
HINT:
The initial condition that the customizing function by the hand-held tester is not chosen is shown.
- Standard:
POWER WINDOW OPERATION CHARTPower window operation Ignition switch ON Ignition switch OFF
Operative after key-OFFIgnition switch OFF Inoperative after key-OFF Manual UP Operative Jam protection function operative Inoperative Manual DOWN Operative Operative Inoperative AUTO UP Jam protection function operative Jam protection function operative Inoperative AUTO DOWN Operative Operative Inoperative UP interlocked with key operation Inoperative Jam protection function operative Jam protection function operative DOWN interlocked with key operation Inoperative Operative Operative UP interlocked with wireless operation Inoperative Inoperative Inoperative DOWN interlocked with wireless operation Inoperative Operative Operative - 2: INSPECT POWER WINDOW FAIL-SAFE FUNCTION
- When an abnormality is detected in the limit switch and pulse sensor for operating the jam protection function (DTC: B1231/31, B1232/32, B1233/33, B1234/34), the following power window operations will be prohibited for fail-safe.
Standard:
POWER WINDOW OPERATION CHARTPower window operation Ignition switch ON Ignition switch OFF Operative after key-OFF Ignition switch OFF Inoperative after key-OFF Manual UP Operative Operation prohibited - Manual DOWN Operative Operation prohibited - AUTO UP Operation prohibited Operation prohibited - AUTO DOWN Operation prohibited Operation prohibited - UP interlocked with key operation - Operation prohibited Operation prohibited DOWN interlocked with key operation - Operation prohibited Operation prohibited UP interlocked with wireless operation - Operation prohibited Operation prohibited DOWN interlocked with wireless operation - Operation prohibited Operation prohibited HINT:
In case of normal limit switch, prohibition (fail-safe function) will be cancelled by fully opening the door glass or fully-closed by manual operation then AUTO operation will be possible.
- When an abnormality is detected in the limit switch and pulse sensor for operating the jam protection function (DTC: B1231/31, B1232/32, B1233/33, B1234/34), the following power window operations will be prohibited for fail-safe.
- INSPECT ECU DATA MONITOR WITH HAND-HELD TESTER
- Check the driver (D) and passenger (P) door ECU condition by the ECU data monitor.
Standard:
D-Door ECU
D-DOOR ECU DIAGNOSTIC CHARTItem Inspecting condition Standard value Driver's side power window AUTO switch Pressed --> Not pressed ON/OFF Jam protection limit switch Power window full-open --> full-closed ON / OFF Passenger's side power window remote AUTO Pressed --> Not pressed ON / OFF P-Door ECU
P-DOOR ECU DIAGNOSTIC CHARTItem Inspecting condition Standard value Passenger's side power window AUTO switch Pressed --> Not pressed ON/OFF Jam protection limit switch Power window full-open --> full-closed ON / OFF D and P-Door ECU (Jam protection threshold)
D AND P-DOOR ECU (JAM PROTECTION THRESHOLD) DIAGNOSTIC CHARTItem Inspecting condition Standard value Window full-closed position --> 1 / 4 open position Power window is going UP by manual operation OK/CAUTION* Window 1 / 4 open position --> 2 / 4 open position Power window is going UP by manual operation OK/CAUTION* Window 2 / 4 open position --> 3 / 4 open position Power window is going UP by manual operation OK/CAUTION* Window 3/4 open position --> full-open position Power window is going UP by manual operation OK/CAUTION* HINT:
*: CAUTION is indicated when something caught in the window is detected.
- Check the driver (D) and passenger (P) door ECU condition by the ECU data monitor.
- INSPECT ACTIVE TEST WITH HAND-HELD TESTER
- Check the driver's and passenger's power window operation by the active test.
Standard:
D and P-Door ECU
D AND P-DOOR ECU DIAGNOSTIC CHARTItem Operation Power window UP/DOWN - Check the driver's and passenger's power window operation by the active test.
- INSPECT CUSTOMIZING FUNCTION (REFERENCE):
- Select the following controls on the power window control system.
Standard:
D-Door ECU
D-DOOR ECU DIAGNOSTIC CHARTItem Setting Power window UP interlocked with door operation With/Without function Power window DOWN interlocked with door operation With / Without function - Select the following controls on the power window control system.
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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.
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