Circuit/System Verification

Ignition ON.
Verify that there are no cooling system DTCs set.
- If any DTCs are set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- If no DTCs are set
Verify the scan tool parameters listed below display OFF.
- Cooling Fan Relay 1 Command
- Cooling Fan Relays 2 and 3 Command
- Cooling Fan Relays 1, 2 and 3 Command
- If a scan tool parameter displays ON
  Refer to Diagnostic Aids and Symptoms - Engine Cooling for further diagnosis.
- If both scan tool parameters display OFF
Verify that the fan is not activated.
- If the fan is operating
  Refer to Circuit/System Testing .
- If the fan is OFF
All OK.