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.
Fail-Safe Chart
- 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, B1232, B1233, B1234), the following power window operations will be prohibited as a fail-safe.
Standard
FAIL-SAFE CHARTPower window operation Ignition switch ON (within 43 sec.) Ignition switch OFF, key-off operation function OFF (after 43 sec.) Ignition switch OFF, key-off operation function OFF (after 43 sec.) 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:
When the limit switch is functioning normally, prohibition (fail-safe function) will be canceled by fully opening or fully closing the door glass 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, B1232, B1233, B1234), the following power window operations will be prohibited as a fail-safe.
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.