Circuit/System Verification

Ignition ON.
Verify DTC P0480 is not set.
- If a DTC is set
  Refer to DTC P0480 .
- If no DTCs is set

NOTE:

A short delay occurs before the ECM changes the cooling fan speed.

Verify the G10 Cooling Fan Motor activates in each available speed when commanding the Cooling Fan Control Circuit High Voltage Test ON with a scan tool. The cooling fan speed should increase with each command.
- Cooling fan does not operate
  Refer to Cooling Fan Inoperative .
- Cooling fan operates
Verify that the engine does not overheat.
- Engine overheats
  Refer to Engine Overheating .
- Engine does not overheat
Operate the vehicle within the Conditions for Running the DTC.
- If the DTC sets
  Refer to Symptoms - Engine Cooling .
- If the DTC does not set
All OK