ABS light and service traction system

Tiny
MERLIN2021
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See that was so easy a caveman could do it!
You are welcome.
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Sunday, July 18th, 2010 AT 6:52 AM
Tiny
MYKDEE
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Well although the noise is gone, I just had the traction control light come back on as well as the ABS chatter.

Was I supposed to have the original code C0245 cleared? Never did that.

What does "Scanned C0245 - Wheel Speed Sensor Frequency Error (Frequency difference between the left and right front sensors)" typically indicate? Do you think I need to replace the drivers side now, or is there something else I should look at?

Like I mentioned before, we really did not know which hub to change, and since the front passenger was the one making noise, we decided to go with that one.
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Sunday, August 22nd, 2010 AT 1:03 PM
Tiny
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I believe the TSB was for both, the wires are too short on the originals, the code means one side is putting out more ac voltage than the other. Here's the technical stuff:
DTC C0245: WHEEL SPEED SENSOR FREQUENCY ERROR Circuit Description The speed sensors used on the front of this vehicle are multiple pole and the rear uses a signal pole magnetic pickup. This sensor produces an AC signal that the EBCM uses the frequency from to calculate the wheel speed. Conditions for Running the DTC à   The ignition switch is ON. à   The DTC can be set after system initialization. Conditions for Setting the DTC à   The EBCM detects a deviation between the left and right rear wheel speeds of less than 100 km/h (62 mph) on vehicles equipped with TCS. à   The EBCM detects a deviation between the left and right front wheel speeds of greater than 10 km/h (6.25 mph) at a vehicle speed of less than 100 km/h (62 mph) on vehicles equipped with TCS. à   The EBCM detects a deviation between the left and right front wheel speeds of greater than 4 km/h plus 6 percent of the vehicle speed at greater than 100 km/h (62 mph). à   The EBCM detects a deviation between the left and right rear wheel speeds of greater than 6 percent of the vehicle speed at greater than 100 km/h (62 mph on vehicle equipped with TCS. à   The EBCM detects a deviation between the left and right front wheel speeds of greater than 4 km/h plus 6 percent of the vehicle sped at greater than 100 km/h (62 mph). The DTC will set when the EBCM cannot specifically identify which wheel speed sensor is causing the malfunction. If the EBCM can identify the specific wheel speed sensor causing the malfunction, DTC C0245 will become a history DTC, and the DTC associated with the sensor (DTC C0036, DTC C0041, DTC C0046, DTC C0051 or DTC C0056) will be set concurrent with DTC C0245. Action Taken When then DTC Sets If equipped, the following actions occur: à   A malfunction DTC stores. à   The ABS/TCS disables. à   The amber ABS/TCS disables. à   The Red BRAKE Warning indicator turn on. Conditions for Clearing the DTC à   The condition for the DTC is no longer present and you used the scan tool Clear DTC function. à   The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. Diagnostic Aids à   It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction. à   Thoroughly inspect any circuitry that may be causing the complaint for the following conditions: à † Backed out terminals à † Improper mating à † Broken locks à † Improperly formed or damaged terminals à † Poor terminal-to-wiring connections à † Physical damage to the wiring harness à   The following conditions may cause an intermittent malfunction. à † A poor connection à † Rubbed-through wire insulation à † A broken wire inside the insulation à   If the customer's comments reflect that the amber ABS/TCS indicator is on only during moist environmental conditions (rain, snow, vehicle wash), inspect all the wheel speed sensor circuitry for signs of water intrusion. If the DTC is not current, clear all DTCs and simulate the effects of water instruction by using the following procedure. 1. Spray the suspected area with a five percent saltwater solution. Add two teaspoons of salt to twelve ounces of water to make a five percent saltwater solution. 2. Test drive the vehicle over various road surfaces (bumps, turns, etc.) Above 40 km/h (25 mph) for at least 30 seconds. 3. If the DTC returns, replace the suspected harness. à   If an intermittent malfunction exists refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS. Test Description The numbers below refer to step numbers on the diagnostic table. 2. If DTC C0245 is a history code, this step checks if a specific Wheel Speed Circuit Malfunction DTC is set concurrently with DTC C0245. 7. This step checks if the wheel speed sensor harness is routed in close proximity to the spark plug wires. 9. In this step, if the scan tool can record any erroneous wheel speed sensor signals, diagnose that sensor(s) first.
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Sunday, August 22nd, 2010 AT 2:28 PM
Tiny
MYKDEE
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Did I need to clear the code after we fixed it the first time?

Does the code indicate which hub?
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Sunday, August 22nd, 2010 AT 2:36 PM
Tiny
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If you read this, it explains C0245 means the EBCM (brake module) cannot figure out which front sensor is causing it, but you have one new one and one old one, change the old one. Yes you should reset the code.
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Sunday, August 22nd, 2010 AT 2:40 PM
Tiny
MYKDEE
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Well I guess I will swap the driver's one next and report back.

I do not know at all, but I was hoping that the code erases itself after fifteen starts (or whatever amount) so I never went back to have the code erased after I changed the passenger hub.

Will the original code still be there? Or does it "go away" after xxx many starts?

If it does not go away, does it show how many times the code comes up?

It is a pain for me to get to the guy that can pull the codes for me, so I just want to make sure I go there either before or after the new drivers hub (probably after) to see what codes come up.
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Sunday, August 22nd, 2010 AT 3:07 PM
Tiny
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If the new part solves the problem, the light will go out without erasing the codes, they will remain in memory for a short time but not light the lamp.
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Monday, August 23rd, 2010 AT 2:23 PM
Tiny
MYKDEE
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I replaced the driver's side on 9/10/10, and got the history code cleared. So far so good. Hopefully that is it. If anyone is interested, each side hub cost about $90.00 at NAPA.

Bad news is, I managed to get the car on a lift and a buddy of mine showed me the rear hubs were moving about a quarter in each way front to back. I guess the bushings on these go bad and you have to replace the entire part. Apparently you cannot just replace the bushing, and it is an OEM part (no NAPA parts for this one). Each side cost around $180.00 and is a considerable amount of work more than the fronts.
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Tuesday, October 5th, 2010 AT 9:18 PM
Tiny
RENDEZVOUSLEMON
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I have a 2002 Rendezvous with same traction problem at 82,000 miles. Shame on GM for not recalling this problem. Other threads have indicated that they were successful by "buying (two) replacement harnesses at Discount Auto for $20.00 each and spliced them in past the damaged wires." Is there a GM replacement part number for just the harness without the wheel bearing hub?
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Thursday, September 6th, 2012 AT 8:34 PM

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