Need a little help to track down a recent problem. Car is 1995 E320 wagon (W124.092) with ~220K miles. I'm getting the following three codes and they appear to be related.

DM/Pin 3: 20 Vehicle speed signal not present

Pin 8: 28 VSS - open circuit

Pin 14: 9 Left rear axle vehicle speed sensor or Hall-effect speed sensor
Rear axle vehicle speed sensor from ABS control module
Rear axle vehicle speed sensor from ETS/SPS control module
Incorrect CC/ISC control module installed ETS signal

The only thing I've done recently was change out the rear diff bushings but the CEL and ABS lights didn't show up for about a week. Now after clearing codes, the CEL shows up after two start cycles and the ABS light comes on every time after moving forward.

Anyone know where I should start?

Thanks!

__________________
Glen Tokuhara
Beauty & the Beast and the wagon that could!

Sounds like an ASR car.

First thing I'd check is the OVP relay, and the LR ABS sensor (left side of diff).

__________________

Gone to the dark side

- Jeff

Thanks...I'll check that sensor, but it doesn't have ASR.

Then it doesn't have a left rear speed sensor.

In which case, there is a single rear speed sensor, on the nose of the differential. Check that, the wires might be in bad shape, being a southern car you might have disturbed some brittle wiring when working on the bushings. It is plugged in behind the right side of the rear seatback. I don't remember the resistance to the sensor if good, but if you pull the seatback you can measure it there. I believe (but don't know) that all 124s with the 3-channel ABS (pretty much everything except ASR cars and 4matic cars) have the same rear speed sensor, you might get lucky finding a used one locally.

__________________

Gone to the dark side

- Jeff

You want to check the VSS/Hall Efect sensor behind the Inst. Cluster.

Give fuse #5 a check first.

__________________
A Dalton

I think I found the problem. It's the ABS sensor wire...when I replaced the rear diff bushings, I forgot to put the ABS wire back into it's clip. It was rubbing against the flex disc which had worn thru the insulation. D'oh!

I'll update this thread after I replace the sensor. Thanks!

FIRED !!!!!!!!

__________________
A Dalton

Yeah, rookie mistake.

Arthur, would you happen to know if the rear ABS sensor from a '90 300E would work in my '95 wagon? The only reason I ask is because I have a 300E parts car...

Just re-read your post. I hope you're right that all 3-channel 124 ABS cars use the same rear sensor...I'm going to try swapping out sensors later this week. Thanks!

< if the rear ABS sensor from a '90 300E would work in my '95 wagon? >

Don't think so b/c the parts section does not show that to be the case........

__________________
A Dalton