Need a cruise control ECU, 80 series

[MikeW]

Hey,

Does anyone have a cruise control ECU from an 80 series?

Mine is from a 92 1HD-T

It's a Toyota / Denso 88240-60020

Cheers

 

[Chris]

Has yours failed? What are the symptoms?

Not sure if any of the 92 80's here were fitted with Cruise

 

[MikeW]

Initial symptom was a fault when trying to using the SET function on the stalk. 90% of the time the ECU would blink the CRUISE lamp on the dash 5 times and then go off permanently until it was reset.

Ah, well I tried to power the feed which goes directly from the ignition to the cruise ECU with a bridge (BW wire in the diagram), as it was dead on all ignition switch positions, which seemed odd. But powering it seems to be a bad idea. Switching the ignition to the ON position seemed to cause all the circuits to go live, including the starter motor - the car would start and the starter motor wouldn't disengage. I quickly removed that little hack, no damage or blown fuses - but now my cruise ECU won't even give me the CRUISE lamp

Mine's the VX Sahara one. Here's the wiring diagram and the ECU

 

[Dave2000]

Sounds like he has let the smoke out guys!

Have you tried Karl Webster on this site?

regards

Dave

 

[MikeW]

No smoke Dave,

I visually inspected the PCB too, and nothing out of the ordinary. But I put a multimeter across two beefy resistors on the board and got nothing

Cheers, will get in contact with Karl!

 

[Towpack]

If you can get some new resistors locally and cheap then it might be worth a shot at changing them I suppose but, chances are, if the fault is/has caused 2 blown 5w resistors then something else will have gone. I'm wondering why the OE feed from the key switch is dead? If you have a wiring fault you risk potentially blowing a replacement ECU if you get one.

 

[MikeW]

Yeah I've given it to an auto electronics whiz, will see how he goes. The fault that cooked it was a bridge from another feed to the OE feed... maybe it's some kind of feedback? I'm not sure... anyway that bridge was removed and now everything is fine, except for the ECU of course. In the mean time I will try to locate, remove and test the speed sensor, which I should have done in the first place.

Cheers for your assistance!