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ABS light on, Stabilitrak light on

Diagnose and fix ABS light on, Stabilitrak light on

GM has issued a service bulletin 08-05-25-004A to address an ABS light on, Stabilitrak light on, occurring on the vehicles listed below. The problem may present itself as ABS light on, Stabilitrak light on and any of the following trouble code.

C0035 Left Front Wheel Speed Sensor Circuit
C0036 Left Front Wheel Speed Sensor Circuit Range/Performance
C0037 Left Front Wheel Speed Sensor Circuit Low
C0040 Right Front Wheel Speed Sensor Circuit
C0041 Right Front Wheel Speed Sensor Circuit Range/Performance
C0042 Right Front Wheel Speed Sensor Circuit Low
C0045 Left Rear Wheel Speed Sensor Circuit
C0046 Left Rear Wheel Speed Sensor Circuit Range/Performance
C0047 Left Rear Wheel Speed Sensor Circuit Low
C0050 Right Rear Wheel Speed Sensor Circuit
C0051 Right Rear Wheel Speed Sensor Circuit Range/Performance
C0052 Right Rear Wheel Speed Sensor Circuit Low

Vehicles affected by service bulletin 08-05-25-004A

2007 Buick Terraza
2007-2009 Buick Allure, LaCrosse, Lucerne
2007-2008 Cadillac XLR
2007-2009 Cadillac DTS, SRX, and STS
2007-2008 Chevrolet Corvette
2007-2009 Chevrolet Impala, Uplander
2007-2008 Pontiac Grand Prix
2007-2009 Pontiac Montana SV6
2007 Saturn Relay

Service bulletin 08-05-25-004A says to diagnose the wheel speed sensors

Do not automatically replace the EBCOM or any other component without testing.

How to test a wheel speed sensors

You’ll need a DVOM.

1 IGN off

2 Set DVOM to ohms scale and disconnect wheel speed

Jeep wheel speed sensor

Wheel speed sensor

sensor harness. Check for 850-1350 ohms between terminals A and B. While you are testing resistance, move the wheel speed sensor pigtail harness to detect wire breakage issues.

3. If the resistance is not within the above values, replace the wheel speed sensor

4. If the resistance IS within spec, check for infinite resistance between each terminal and the steering knuckle. Then reverse the test probes and check for infinite resistance between each terminal and the steering knuckle again. If you don’t see an infinite value, replace the appropriate wheel speed sensor.

5. Set the DVOM to AC voltage, connect the leads to two wheel speed sensor terminals and spin the wheel. The voltage should rise to more than 100 mV AC as you spin the wheel faster. If the reading is less than 100mV AC, replace the wheel speed sensor.

Posted on by Rick Muscoplat

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