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 MANUALSPONTIAC2006G6 GTP, 2D COUPE, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 16 (ENGINE CONTROL SYSTEM - 2.4L - DTC P0351 TO DTC P2138)DTC P1682CIRCUIT/SYSTEM TESTING
2006 Pontiac G6 GTP, 2D Coupe, Standard
Circuit/System Testing
2006 Pontiac G6 GTP, 2D Coupe, StandardSECTION Circuit/System Testing
WARNING: This page is about a different variant/trim than selected.
- Ignition ON, observe the Ignition 1 Voltage parameter. Voltage should be more than 10 volts.
- If less than 10 volts, test the ignition 1 voltage circuit that powers the ETC fuse for an open or a faulty ECM.
- Ignition ON, probe both sides of the ETC fuse with a test lamp. The test lamp should illuminate on both sides of the fuse.
- If the test lamp illuminates on only one side of the fuse, test the ignition 1 voltage circuit that powers the ETC fuse for a short to ground or a faulty ECM.
- Ignition OFF, probe both sides of the ETC fuse. The test lamp should not illuminate on either side of the fuse.
- If the test lamp illuminates on at least one side of the fuse, test the ignition 1 voltage circuit that powers the ETC fuse for a short to voltage or a faulty ECM.
- Ignition ON, probe both sides of the PCM IGN 1 fuse. The test lamp should illuminate on both sides of the fuse.
- If the test lamp illuminates on only one side of the fuse test the ignition 1 voltage circuit that powers the PCM IGN 1 fuse for a short to ground or a faulty ECM.
- If the test lamp does not illuminate on both sides of the fuse, test the ignition 1 voltage circuit that powers the PCM IGN 1 fuse for an open or faulty ECM.
- Ignition OFF, probe both sides of the PCM IGN 1 fuse. The test lamp should not illuminate on either side of the fuse.
- If the test lamp illuminates on at least one side of the fuse, test the ignition 1 voltage circuit that powers the PCM IGN 1 fuse for a short to voltage or a faulty ECM.
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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.