Conditions for Setting the DTC
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0685
- The commanded state of the ODM and the actual state of the control circuit do not match.
- The condition is present for more than 5 seconds.
DTC P0689
- The ECM detects less than 5 volts on the ignition 1 voltage circuit to the ECM.
- The condition is present for more than 5 seconds.
DTC P0690
- 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.