Hopefully someone will read this through the mire of junk mails that plague this group! My 4WS started to intermittently switch on and off (warning light on dash) when I came to drive it. That is to say, some days it would work then other days it wouldn't. Now it's got to being permanently off 4WS & the dash lamp stays on all the time (apart from the initial 10 secs delay/30mph, once driving). So far I've diagnosed the codes to 2 faults. steering sensor on the rear assembly & the "back up" motor. I've just had the sensor renewed by Toyota Main Dealer (part came all the way from Japan, I think I paid for a guy to hand carry it here judging by the price!). This has not cured the 4WS problem as dash light still comes on after the initial delay, but the fault codes now only show 1 code.....the back up motor. Also the 2WS/4WS dash switch does nothing, which I believe is what the backup motor is operated by?? Any ideas which motor on the rear assembly is the backup motor? any advice on where to hit it with a hammer? It's probably got brushes wear, I'm guessing, same thing as the motors in the retractable wing mirrors.....but I sorted that and have 8 new replacements for anyone with knackered retractable mirrors (job takes about 30 mins each side to change over the motors). Any help is welcomed...and no I don't want a bachelors degree, physical extensions or a years supply of viagra....well maybe not just yet.... Mike

Hi Bishop, I had the same problem, but balancing the sensor seems to have solved the problem. When you changed the new sensor did youadjust it for proper balance?

Hello Robert,

Many thanks for your advice on the matter.

As the mechanic at the Toyota main dealer fitted the sensor, he said it was the first time he had ever worked on a 4WS. He explained that he fitted the sensor the same way as he removed the old one, presumably meaning just by its “visual orientation”.

How would I adjust the sensor for proper balance?

Would this adjustment bring the 4WS back to normal operation even though the diagnostic code is saying 32 = Back Up Motor/Steering Control Relays?

(Steering control relays (engine bay) have been checked & are OK).

Regards

Mike Bishop

 

Hi Mike, I am assuming you replaced the 4WS sensor which is located next to the two 4WS motors. If you trace the wiring of this sensor it will lead you to a connector in the boot. Remove the panel cover and you will see it. This is a 3 pin connector. Disconnect it. Take an Ohmmeter and measure the resistance between Pin 1 and Pin 3. Divide this by 2 and this is approximately the value you should see between Pin1 and Pin2, and also between Pin3 and Pin2. If they are unequal, you will have to loosen the two screws on the sensor. These are mounted in slots, so that you can adjust the sensor by turning the sensor. Tighten back once you can get the two values to be approximately the same. Hope this solves your problem. Good luck. By the way where are you located? I am in Penang, Malaysia. Maybe we can exchange photos of our Celicas. I don't get to see many convertibles around here. Regards, Robert

hi i know how u feel, ive had alot of problems with my 4ws,i have recently taken my rear steer box out,i disconntected both motors and tested both motors with a bat,i found that a stone had damaged the caseing on 1 of the motors,causeing it 2 cease up,,this will burn the windings in the motor,i woz lucky i had a spare,i also had 2 change the shaft as it had worn out,i have alot of info on 4ws and photos,my computer is down at the mo,im on some1 else,il have mine back on line 2 moro,and will send u what i have,it may b of some help,i priced the part in ireland,it all comes in 1 piece from main dealer, 1800 euros!!! >

also the motors are special!nothing else will do. >