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 MANUALSGMC2009CANYON 4D PICKUP, 2.9 9REPAIR AND DIAGNOSISBRAKESTRACTION CONTROLANTILOCK BRAKE SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC C0035-C0050CIRCUIT/SYSTEM TESTING
2009 GMC Canyon 4D Pickup, 2.9 9
Circuit/System Testing
2009 GMC Canyon 4D Pickup, 2.9 9SECTION Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the EBCM.
- Ignition ON, test for less than 1 volt between the ignition voltage circuit terminal of the appropriate sensor listed below and ground.
- LF Sensor circuit terminal 45
- RF Sensor circuit terminal 34
- LR Sensor circuit terminal 36
- RR Sensor circuit terminal 43
- If greater than the specified range, test the ignition voltage circuit for a short to voltage.
- Test for less than 1 volt between the signal circuit terminal of the appropriate sensor listed below and ground.
- LF Sensor circuit terminal 46
- RF Sensor circuit terminal 33
- LR Sensor circuit terminal 37
- RR Sensor circuit terminal 42
- If greater than the specified range, test the signal circuit for a short to voltage.
- Ignition OFF, test for infinite resistance between the ignition voltage terminal of the appropriate sensor listed below and ground.
- LF Sensor circuit terminal 46
- RF Sensor circuit terminal 34
- LR Sensor circuit terminal 36
- RR Sensor circuit terminal 43
- If less than the specified value, test the ignition voltage circuit for a short to ground.
- Ignition OFF, test for infinite resistance between the following signal circuit terminal of the appropriate sensor listed below and ground.
- LF Sensor circuit terminal 45
- RF Sensor circuit terminal 33
- LR Sensor circuit terminal 37
- RR Sensor circuit terminal 42
- If less than the specified value, test the signal circuit for a short to ground.
- Ignition OFF, disconnect the harness connector at the appropriate WSS.
- Ignition OFF, test for less than 2 ohms between the appropriate ignition voltage circuit terminals listed below.
- LF Sensor circuit terminal 46 at the EBCM harness connector and terminal A at the WSS harness connector.
- RF Sensor circuit terminal 34 at the EBCM harness connector and terminal A at the WSS harness connector.
- LR Sensor circuit terminal 36 at the EBCM harness connector and terminal A at the WSS harness connector.
- RR Sensor circuit terminal 43 at the EBCM harness connector and terminal A at the WSS harness connector.
- If greater than the specified value, test the ignition voltage circuit for an open or high resistance.
- Test for less than 2 ohms between the appropriate signal circuit terminals listed below.
- LF Sensor circuit terminal 45 at the EBCM harness connector and terminal B at the WSS harness connector.
- RF Sensor circuit terminal 33 at the EBCM harness connector and terminal B at the WSS harness connector.
- LR Sensor circuit terminal 37 at the EBCM harness connector and terminal B at the WSS harness connector.
- RR Sensor circuit terminal 42 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 all circuits test normal, replace the appropriate wheel speed sensor. If the DTC resets 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.