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 DIAGNOSISENGINE MECHANICALSTARTERBATTERY, CHARGING SYSTEM AND STARTING SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC C0899CIRCUIT/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 OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 ohms between the ground circuit terminals listed below and ground:
- Terminal 2
- Terminal 3
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Verify that a test lamp illuminates between the B+ circuit terminals listed below and ground:
- Terminal 1
- Terminal 4
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
- Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 21 and ground.
- If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
- 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.