Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1242 (ANTI-LOCK BRAKE SYSTEM, TRACTION CONTROL SYSTEM & STABILITY CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC C0045 OR C0050 (WITH JL4 VSES)CIRCUIT/SYSTEM TESTING
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2
Circuit/System Testing
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Circuit/System Testing
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
It is recommended that Component Testing is performed before Circuit Testing when diagnosing wheel speed sensors.
- Ignition OFF, disconnect the harness connector at the EBCM.
- Ignition ON, test for less than 1 volt between the low reference circuit terminals of the appropriate sensor listed below and ground.
- LR Sensor circuit terminal 20
- RR Sensor circuit terminal 31
- If greater than the specified value, test the low reference circuit for a short to voltage. If the circuit tests normal, replace the wheel speed sensor.
- Test for less than 1 volt between the signal circuit terminals of the appropriate sensor listed below and ground.
- LR Sensor circuit terminal 33
- RR Sensor circuit terminal 19
- If greater than the specified value, test the signal circuit for a short to voltage. If the circuit tests normal, replace the wheel speed sensor.
- Ignition OFF, test for infinite resistance between the low reference terminals of the appropriate sensor listed below and ground.
- LR Sensor circuit terminal 20
- RR Sensor circuit terminal 31
- If less than the specified value, test the low reference circuit for a short to ground. If the circuit tests normal, test or replace the wheel speed sensor.
- Test for infinite resistance between the following signal circuit terminals of the appropriate sensor listed below and ground.
- LR Sensor circuit terminal 33
- RR Sensor circuit terminal 19
- If less than the specified value, test the signal circuit for a short to ground. If the circuit tests normal, test or replace the wheel speed sensor.
- Ignition OFF, disconnect the harness connector at the appropriate WSS.
- Test for less than 2 ohms between the appropriate low reference circuit terminals listed below.
- LR Sensor circuit terminals 20 at the EBCM harness connector, and terminal A at the WSS harness connector
- RR Sensor circuit terminals 31 at the EBCM harness connector, and terminal A at the WSS harness connector
- If greater than the specified value, test the low reference circuit for an open or high resistance. If the circuit tests normal, test or replace the wheel speed sensor.
- Test for less than 2 ohms between the appropriate signal circuit terminals listed below.
- LR Sensor circuit terminals 33 at the EBCM harness connector, and terminal B at the WSS harness connector
- RR Sensor circuit terminals 19 at the EBCM harness connector, and terminal B at the WSS harness connector
- If greater than the specified value, test the signal circuit for an open or high resistance. If the circuit tests normal, test or replace the wheel speed sensor.
- If all circuits test normal, replace the EBCM.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.