Conditions for Setting the DTC
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2013 GMC Yukon XL, 2013 GMC Yukon, 2013 Chevrolet Suburban, 2013 Chevrolet Avalanche, and 2013 Cadillac Escalade EXT. However, it is still accessible from the selected car via links, so may be relevant.
P0685
The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match for greater than 2 s.
P0690
- The ECM detects the engine controls ignition relay feedback circuit is greater than 2.5 V when the relay is commanded OFF.
- The ECM detects the engine controls ignition relay feedback circuit is greater than 18 V when the relay is commanded ON.
- The condition is present for greater than 4 s.
P1682
The ECM detects that the voltage level difference is greater than 3 V between the 2 ignition voltage circuits for less than 1 s.