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 DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 53 (DATA COMMUNICATION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESSCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICEDIAGNOSTIC FAULT INFORMATION
2009 GMC Canyon 4D Pickup, 2.9 9
Diagnostic Fault Information
2009 GMC Canyon 4D Pickup, 2.9 9SECTION Diagnostic Fault Information
WARNING: This page is about a different car, the 2008 Isuzu i-370, 2008 Isuzu i-290, 2008 GMC Canyon, and 2008 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
Scan Tool Does Not Communicate with Class 2 Device
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| Class 2 Serial Data | 1 | U1001-U1254 | 1 | - |
| Ground (DLC, terminal 5) | - | 1* | - | - |
| * An open in the DLC ground circuit terminal 5 will only effect the communication with the scan tool. The vehicle modules will still communicate. 1. No communication on any class 2 serial data module |
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RENDER: 1.0x
NO RELATED
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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.