Conditions for Setting the DTC: P0690
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- The ECM detects more than 16 volts on the ignition 1 voltage circuit to the ECM when the relay is commanded ON.
- The ECM detects more than 2 volts on the ignition 1 voltage circuit to the ECM when the relay is commanded OFF.
- The condition is present for more than 2 seconds.