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Old 07-19-2019, 01:53 PM   #1
billintomahawk
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Default Wheel sensor/wheel spin CEL/Codes

Hello all and thanks in advance.

I'm in the midst of a cross country trip.
The vehicle is running and driving very well.
When applying heavy braking there is a pulsing in the brake pedal.

Symptoms.
I have instrument panel lights on SOMETIMES.
Check Engine light
ASR
ABS
SRS

Lights come on/are actuated when a big whoop is encountered at speed and especially felt in the rear of the vehicle. If I am using cruise control it immediately drops out. If I stop and turn off the ignition everything resets USUALLY. The SRS light does not seem related and comes and goes without a pattern.

I am getting the following codes.

P2203-32 External quanity control by ARS-Request from control module is implausible.

P0500-1 Vehicle speed signal-The CAN data are invalid.

B1010-The SRS malfunction indicator light is faulty.

C1107-Wheel Speed at Right rear axle speed and sensor is faulty.

P2400-Canbus the rear right wheel speed of the traction system is implausible.

P1860-Right rear wheel speed is implausable.

I need help with the diagnosis.
Any links to wheel speed sensor threads are appreciated, I don't understand how they work.
It looks like this thread is my friend, another note...the right rear mudflap was missing when I inherited my Sprinter. It has been replaced. The rear brakes have been disassembled, calipers cleaned and pads replaced. No adjustments were made to the speed sensors.

https://sprinter-source.com/forum/sh...ad.php?t=18072

As stated above the vehicle drives and the engine runs perfectly.
All shifting and transmission operation is normal.

I am able to clear these codes but they return with vehicle use.

bill in tomahawk
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2002 T1N Freightliner
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Last edited by billintomahawk; 07-19-2019 at 02:46 PM.
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Old 07-19-2019, 02:43 PM   #2
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Default Re: Wheel sensor/wheel spin CEL/Codes

I have a similar condition in my 2006. Coincidentally also right rear.

My bet is that your entire problem is the right rear brake not performing to spec, not a wheel speed sensor issue. The sensors are doing their job. The ESP/ASR etc. monitors are sensitive enough to notice a slightly deficient brake during hard braking, but not during normal stops.

My right rear rotor shows signs of minimal contact of the pads. I now have a new rotor, pads on hand and plan to change out those parts and the caliper. I suspect that my caliper isn't moving like it should. Replacing all parts along with inspection of the slide surfaces should cure my problem.

In my situation I may have reduced braking efficiency, but to date it hasn't been a problem.

Inspect your right rear rotor inside and outside surfaces for signs of odd wear pattern.

vic
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Old 07-19-2019, 02:46 PM   #3
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Default Re: Wheel sensor/wheel spin CEL/Codes

Try replacing the right rear wheel speed sensor. If it is outputting a speed that is different than the speed of the other wheels, the ABS, Anti-skid, and cruise computers disable those respective functions.
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Old 07-19-2019, 02:53 PM   #4
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Default Re: Wheel sensor/wheel spin CEL/Codes

Quote:
Originally Posted by billintomahawk View Post
...
When applying heavy braking there is a pulsing in the brake pedal.
...
No matter how new the parts, or how recent the maintenance service, you have a brake problem. Don't replace any sensor until you resolve the pulsing brakes. Check the right rear wheel before all others. ABS is more of a chatter, not a pulse.

vic
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Last edited by Aqua Puttana; 07-19-2019 at 02:56 PM.
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Old 07-19-2019, 03:23 PM   #5
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Default Re: Wheel sensor/wheel spin CEL/Codes

What is a "big whoop"? A bump/pothole? Or a wind blast from a semi or crossing a gulch in NM?

Sounds like your symptoms show up suddenly WITHOUT any immediately prior use of the brakes (causing cruise drop out without braking). Is that correct?
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Old 07-19-2019, 04:13 PM   #6
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Default Re: Wheel sensor/wheel spin CEL/Codes

Quote:
Originally Posted by rollerbearing View Post
What is a "big whoop"? A bump/pothole? Or a wind blast from a semi or crossing a gulch in NM?

Sounds like your symptoms show up suddenly WITHOUT any immediately prior use of the brakes (causing cruise drop out without braking). Is that correct?
Good point. I interpreted the highly technical "Big Whoop" as needing to apply the brakes harder than normal at which time the pulsing was noticed.

vic
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Old 07-19-2019, 05:04 PM   #7
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Default Re: Wheel sensor/wheel spin CEL/Codes

Quote:
Originally Posted by rollerbearing View Post
What is a "big whoop"? A bump/pothole? Or a wind blast from a semi or crossing a gulch in NM?

Sounds like your symptoms show up suddenly WITHOUT any immediately prior use of the brakes (causing cruise drop out without braking). Is that correct?
That's right, a dip in the road...not a sharp bump so much.
It's sudden. Whoop. Lights come on, cruise drops out. 60-70 mph on a good road with a dip.
Not always, sometimes.

bill
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Last edited by billintomahawk; 07-19-2019 at 05:07 PM.
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Old 07-19-2019, 05:52 PM   #8
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Default Re: Wheel sensor/wheel spin CEL/Codes

I have no experience with this, but perhaps wire flex if there is a sensor cable flopping around causing a wire break? Wheel bounce causing a unexpected change in tone ring signal due to worn shocks? A low pressure in the RR tire (bigger wheel diameter change on dip)?

Last edited by rollerbearing; 07-19-2019 at 05:58 PM.
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Old 07-19-2019, 08:18 PM   #9
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Default Re: Wheel sensor/wheel spin CEL/Codes

I agree with Vic. Take off the wheels and look at the brakes. Fix whatever is wrong. While in there you can tap the sensors from the back so they are closer to the tone wheel. Taking off the rear rotors allows you to clean the tone wheel and sensor. Sometimes rotor removal is difficult. Lots of threads here about the brakes.

Regards,

Mark
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Old 07-20-2019, 04:46 AM   #10
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Default Re: Wheel sensor/wheel spin CEL/Codes

Thanks for the suggestions.
I'll be home early next week, the brakes will come apart.

I will follow up with a report and some pictures.

bill
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Transporter 1 Neu 154HP
2500 140"WB, low top
Tank, the repurposed van
https://www.sprinter-source.com/foru...ad.php?t=76877
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