The trip odometer on my 94 940 has jammed up. I need it to monitor fuel use since the car has the classic fuel gauge sender problem.

I was assuming the issue was a broken gear, probably from resetting it while the car is in motion.

I contacted Dave Barton about it. He says the later 940 clusters had Yazaki speedos instead of VDO, and the Yazaki gears do not break but have circuit board failures.

Since my odometer works and the trip odometer does not, I am assuming it is a gear issue. ???

Anybody else have their trip odometer fail on a later 940?

Just asking before I go ahead and open the cluster...

Thanks for the responses.

Sounds like the easiest fix is to swap in a functioning speedo. I'm assuming I can just switch speedos and not have to do a whole cluster.

I do have another working cluster, but it has 330k miles on it... ???

I'll get in touch with Blindboy.

Dear MrNabisco,

Hope you're well. If you don't want to try to fix your in-service speedometer, an outfit in Minnesota - APT Instruments, www.gaugeguys.com - likely can do the work or re-set a salvage yard unit to the mileage on your car. You'll need to supply some documentation, if the salvage yard unit's mileage is higher than that on your car's speedometer.

An APT expert re-set a salvage yard speedometer for use in my 940. It has worked perfectly for well over a decade.

The cost was under $100, including postage.

Hope this helps.

Yours faithfully,

Spook

I can got you a 94 Speedo call or text tomorrow,,,9083431939

Dear Blindboy,

Hope you're well. I presume your reply to my post is meant for MrNabisco.

It will be far easier for him to get re-set and re-calibrated a working speedo, than to have fixed, the one that has failed.

Yours faithfully,

Spook

Dear Mr Nabisco,


You mentioned - "I contacted Dave Barton about it. He says the later 940 clusters had Yazaki speedos instead of VDO, and the Yazaki gears do not break but have circuit board failures"

--> Yes mine's Yazaki board 1994 940. This could be due to leaking capacitor with its electrolytes corroding the copper tracks.

During opening my cluster last month due to quartz clock failure (turned out to be broken magnetic rotor now successfully repaired with superglue) I noticed a capacitor had leaked on my odo board with corrosions of the tracks. Luckily my odo was still working.

It was a 100uF/25v capacitor soldered on the odo's power supply track. I replaced the capacitor. Tight spaces in there, my stubby fingers can't go in. Needed to use tweezers to handle the item. Cleaned the board with cotton buds plus acetone. Then I hardwired the corroded tracks with some left over spare component legs. Soldered point to point.



You mentioned - "Since my odometer works and the trip odometer does not, I am assuming it is a gear issue. ???"

--> There are 2 "small motors" on the Yazaki odo board. One to turn the odo needle and another to turn the odo tripmeter. Could be one the copper tracks leading to your tripmeter motor had corroded. Find/replace the defective capacitor first (source of corrosion). Its a one sided circuit board. Repair should be easy as above.


Regards,
Amarin.

Sorry but.

"Since my odometer works and the trip odometer does not, "

pencil and paper and math.....or do you really want to rip into that cluster?????