Circuit/System Testing
WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect PIM connector X1.
- Ignition ON, test the voltage on the ignition 1 circuit, between connector X1 terminal 20 and ground. The voltage should be within 0.5V of actual battery voltage.
- If not within the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the PIM.