Limp home, code p2545, c0037

[aka1004]

All hell broke loose with abs, vss and limp home...
checked oil, switched relays around and did the 3 quick on and off thing but didn't clear the limp home mode.
No signs of problems, stopped and restarted when it happened.
Any ideas? Thank you in advance.

 

[Arr MiHardies]

Turn off, take out key, and walk away (with key) for 15 minutes. Sometimes you just need to get the key away from the machine

 

[spyryder]

You have a wheel sensor fault at the rear wheel.

 

[spyryder]

P2545 ECM VSS failure

C0037 VCM Wheel speed sensor #2, right front supply failure. Damaged circuit wires, wheel speed sensor or VCM pins. Damaged tooth wheel or air gap too big.

Hmmm, mine says sensor #3 (R).....from the '08 service manual.

 

[aka1004]

I am sorry. It's a 09 rs, se5.

 

[docdoru]

You have a wheel sensor fault at the rear wheel.

:agree:
Damaged circuit wires, damaged Wheel Speed Sensor or damaged VCM pins.
Damage tooth wheel or too big air gap.
Check for damage wheel speed sensor.
Check for damage tooth wheel.
Make sure sensors as an acceptable air gap form the tooth wheel.
Disconnect VCM and VSS3.
Measure resistance between harness connector 9-VCM-6 and 9-VCM-27. (Expected value > OPEN).
Measure resistance from connector: 9-VCM-6 to 3-VSS3-2 (Expected value: < 2 ohms)
Measure resistance from connector: 9-VCM-27 to 3-VSS3-1 (Expected value: < 2 ohms)

Based on past experience: clean the speed sensor(s) from oil and debrids, inspect the space (gap) between the sensor and the teeth. If you have a McCruise Cruise control a magnet is stack in the teeth.

 

[aka1004]

Where will this sensor be? By the rear wheel or should I trace the cable, it's the thick, heavily shielded one, right?

 

[spyryder]

Where will this sensor be? By the rear wheel or should I trace the cable, it's the thick, heavily shielded one, right?

Your '09 will have TWO sensors at the back with a separate wire going to each sensor. They're mounted together just behind the caliper.

 

[docdoru]

Your '09 will have TWO sensors at the back with a separate wire going to each sensor. They're mounted together just behind the caliper.

And they change to one sensor in second half 2010 (Bosch build specific for Spyder, before they have 4 sensors - 2 in the back-from Audi). :read:

 

[aka1004]

Thank you so much.
I will check on that when I get home.
For now, I ended up disconnecting negative terminal for 30 minutes to get rid of limp home mode.
40 miles and it has not returned yet.

 

[spyryder]

And they change to one sensor in second half 2010 (Bosch build specific for Spyder, before they have 4 sensors - 2 in the back-from Audi). :read:

Also looks a LOT like the Bosch system on my Chrysler 300. They simply installed a bleeder screw on the Spyder ABS pump where the line for the 4th wheel goes on my Chrysler. :spyder:

 

[spyryder]

So are they both hooked up to the VSS or can one be used as a spare?

You'd need them both working because the earlier versions are adapted from 4 wheel systems.

 

[aka1004]

Upon a closer look, one sensor is right on the disc where other has like 1/16" or little less gap.
I take it that it should not be right on the disc without any gap???

 

[billybovine]

gauge

There should be a gauge in your tool kit for this. I would be looking for another problem that caused the gap to change.

 

[aka1004]

Hmmm, interesting...
Fault lights came back but when I set the gap on sensor that was right on the disc similar to other sensor, limp home mode went away when turn the spyder back on. Could it just be coincidence or timing???

What does that gauge looks like? I probably don't have it but may be I can borrow one from dealer or other Ryder. Thank you.