2001, s40, Speedometer, odometer, brake indicator fail

[brothern8]

Good Day.

I am having a problem with the speedometer, odometer, trip, abs and brake indicator lights. About 2/3 of the time when I turn on the car the abs and brake lights show up on the dash and the speedometer, odometer and trip-meter do not work. Some times if I drive long enough the problem will suddenly fix and everything works for a few miles then it fails again. There does not appear to be any performance issues, but I have not tried hard braking to see if the ABS is actually off-line or if it is just the indicator light.
Thanks
Nathan Miller

[SuperHerman]

Two possible problems. First since your problem is intermittent you may have a bad connection or frayed wire. Isolate the circuits affected and look at the wires for visual damage. If none is found go to the actual connectors and check them to make sure they are seated well. I would unplug them and do a visual check. Clean them and reconnect.

Second, if this fails you may have a failing module - with a bad solder joint. Maybe some corrupted software. This is possibly a dealer level diagnostic if you do not have VIDA.

I would focus on the CEM and DIMM.

[lama15]

Had similar problem, but was more abrupt and all stopped working. I had to get a new ABS module to fix it. Also have seen repair done with soldering fix internally. Best of luck

[Matty Moo]

That uses a Bosch abs module and all of those will fail at some point. Absolutely NOT something you want to try to repair yourself. I've repaired about a dozen of them and they're way outside my comfort zone. You have to bond a wire to a tiny aluminum plate and there are a bunch of hair-thin wires in the same area. That isn't the bad part, it's removing the gooey coating covering all of it without disturbing anything. I always tell people to send them to Modulemasters, that isn't the module that you want to price shop on repair.