Chart C-12B Coolant Fan Control Circuit

Fig. 095 - Wiring Diagram for Chart C-12 Engine Cooling Fan. VIN P:

CHART C-12B

ENGINE COOLING FAN

2.0L "J" SERIES

FUEL INJECTION (TBI)

The engine cooling fan is turned on when the fan control relay is energized by the ECM.
Fan will be on when:
- Coolant temperature is greater than 110°C (230°F).
- A/Conditioning on and vehicle speed less than 40 MPH
- Code 14 or 15, coolant sensor failure

Fig. 094 Chart C-12B Engine Cooling Fan:

1. If the owner complained of an over heating problem, it must be determined if the complaint was due to an actual boil over or the hot light or temp. gauge indicated over heating.
If the gauge or light indicates over heating, but no boilover is detected, the gauge circuit should be checked. The gauge accuracy can also be checked by comparing the coolant sensor reading using a "SCAN" tool and comparing its reading with the gauge reading.
If the engine is actually overheating and the gauge indicates overheating, but the cooling fan is not coming on, the coolant sensor has probably shifted out of calibration and should be replaced.
If the engine is overheating and the cooling fan is on, the cooling system should be checked.