Diagnostic Fault Information
WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Always perform the Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
DTC P0685
| Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
|---|---|---|---|---|---|
| Battery Supply Voltage - Coil | P0685 | P0685 | P0685 | - | - |
| Battery Supply Voltage - Armature | P0685 | P0685 | P0685 | - | - |
| Relay Control Circuit | P0685 | P0685 | P0685 | P0685 | - |
| Relay Feedback Circuit | P0685 | P0685 | P0685 | P0685 | - |