Circuit/System Verification
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON, command the auxiliary coolant pump relay ON and OFF with the scan tool. An audible click should be heard when changing between the commanded states.
- Start the engine, observe the DTC information with a scan tool. DTCs P2600, P2602, or P2603 should not set.
- Ignition ON, engine off observe the DTC information with a scan tool. DTC P2601 should not set.
- If DTC P2601 is set refer to the following links:
- Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.