Circuit/System Verification
- Verify that DTCs P0480, P0481, P0691, P0692, P0693 and P0694 are not set.
- If any cooling system DTCs are set, repair the DTC first. Refer to DTC P0480, P0481, P0691, P0692, P0693, OR P0694 .
- Ignition ON, command the appropriate fan relay ON and OFF with a scan tool. Verify that the fans turn ON and OFF when changing between the commanded states.