P0480

AB : P0480. RADIATOR COOLING FAN MODULE DRIVE

AB1 : CHECK THE PULSE WIDTH MODULATED SIGNAL TO THE COOLING FAN MODULE

1. Disconnect the radiator cooling fan module electrical connector PWM1.
2. RUN the engine to a temperature at which the cooling fans would operate.
3. Using a suitable meter, test for a pulse width modulated signal at PWM1 pin 3 (WU).

Is a PWM signal present?
Yes
INSTALL a new cooling fan module. CLEAR the DTC. TEST the system for normal operation.

No
Goto AB2

AB2 : CHECK CONTINUITY OF THE RADIATOR COOLING FAN MODULE SIGNAL WIRE

1. Turn the ignition switch to the OFF position.
2. Disconnect the PCM electrical connector EN16.
3. Measure the resistance between the radiator cooling fan module electrical connector PWM1 pin 3 (WU) and the PCM electrical connector EN16 pin 51 (WU).

Is the resistance less than 5 ohms?
Yes
INSTALL a new PCM. Before replacing a PCM, contact Dealer technical support.

No
REPAIR the circuit between the radiator cooling fan module electrical connector PWM1 pin 3 (WU) and the PCM electrical connector EN16 pin 51 (WU). For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.