P0480

AE : P0480. RADIATOR COOLING FAN MODULE DRIVE

G92429t148 : 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

G92429t149 : CHECK CONTINUITY OF THE RADIATOR COOLING FAN MODULE SIGNAL WIRE
1. Turn the ignition switch to the OFF position.
2. Disconnect the ECM electrical connector EN16.
3. Measure the resistance between the radiator cooling fan module electrical connector PWM1 pin 3 (WU) and the ECM electrical connector EN16 pin 51 (WU).

- Is the resistance less than 5 ohms?

-> Yes
INSTALL a new ECM. Before replacing an ECM, contact dealer technical support.

-> No
REPAIR the circuit between the radiator cooling fan module electrical connector PWM1 pin 3 (WU) and the ECM electrical connector EN16 pin 51 (WU). CLEAR the DTC. TEST the system for normal operation.