Passenger door sensor no longer working

Does the lock motor work?

 

Failing keyfob battery?

 

There is a module in the door handle itself that detects your hand or the antenna that picks up the fob for that side of the car. Typically the car will illuminate some interior lights as you approach which may be a way to determine if the antenna is at fault. I would change the battery in the fob as it may be just strong enough for the drivers and starting but perhaps not for the passenger side. I suspect the Techstream software through OBD2 may show some status as well. It's hard to troubleshoot Toyota specific ecus without that tool. There may be some settings in the headunit that could impact it as well. Maybe a lockout. Attached is a drawing of the antenna circuits for what its worth.

 

low 12v?

 

Coincidentally, my key fob just turned up dead, won't lock or unlock doors, while the SO's fob works just fine. Off to find a fresh CR1632...

 

Wasn't the nearness of the keyfob unlocking effect a function of some configuration setting in some models? I seem to recall this being a feature on one of the upper end models and since the OP has a Five...

 

We have a five and a dead fob doesn't work, close or far...

 

You can remotely lock or unlock with the fob much further away than the proximity antenna detects your presence and illuminates the interior (and I would assume, enables the door handle open feature).

 

That's been our experience, as long as the fob battery works. With a dead battery, there is no proximity detection, so it is not purely a passive transponder. THAT was a surprise.

 

If the driver's side works, it is unlikely a fuse is bad as both doors feeds the same "certification ecu". Looking at the drawing, it appears the door handle assembly itself may have an antenna which means the handle "could" be bad. However I would check the configuration settings in the head unit (p 523 of owners manual) and verify there is not a simple setting fix.

Again, the Toyota Techstream ODB2 system would help by monitoring those devices.

Detailed troubleshooting procedures are available on the Toyota TIS information system (techinfo.toyota.com), which is accessible online (twenty dollars for two days) with download capabilities of the information. Unfortunately, it's not "one" big manual but hundreds of separate docs which are linked together when you are online. Plus one can easily get overwhelmed trying to find things without knowing terms and names. Having a dealer diagnose the problem could be worth the money.

Reading the schematics only goes so far on a highly software driven system where logic sequencing is everything. Attached are two more drawings, one shows the certification ecu's 7.5 amp fuses, the second shows the door handle module.

 

I have a gen 2 w sks. My only master fob just suddenly wit working. The buttons don't cause a lock unlock j And, if i touch the handle, nothing. It will start the car.

My initial reaction was, " Fuuuuuu...dge." After thinking about it some. I'm considering doing the chicken dance with just that one key. The computer should still have the numbers in the fob so it will probably allow me to create an identical record of a second activated let fob. That is assuming that qa didn't text that condition.

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