P0480

: DTC P0480; RADIATOR COOLING FAN MODULE DRIVE CIRCUIT MALFUNCTION

G258127t73 : CHECK THE RADIATOR FAN MODULE PERMANENT SUPPLY
1. Disconnect the fan module electrical connector, GC04.
2. Measure the voltage between GC04 (NG) and GROUND.

- Is the voltage less than 10 volts?

-> Yes
REPAIR the circuit between the cooling fan module and battery. This circuit includes fuse 35 of the front power distribution box (80A), and the high power protection module. CLEAR the DTC. TEST the system for normal operation.

-> No
Reconnect electrical connector, GC04.

G258127t74 : CHECK THE RADIATOR FAN MODULE GROUND
1. Disconnect the fan module electrical connector, GCU03.
2. Measure the resistance between GCU03 (B) and GROUND.

- Is the resistance greater than 5 ohms?

-> Yes
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

-> No
Reconnect electrical connector, GCU03.

G258127t75 : CHECK THE RADIATOR FAN MODULE EMS SWITCHED SUPPLY
1. Disconnect the fan module electrical connector, GC01.
2. Turn the ignition switch to the ON position.
3. Make sure the EMS relay is engaged.
4. Measure the voltage between GC01, pin 02 (GU) and GROUND.

- Is the voltage less than 10 volts?

-> Yes
REPAIR the circuit between the cooling fan module and battery. This circuit includes the front power distribution box, (fuse 14) the EMS control relay, and the high power protection module. CLEAR the DTC. TEST the system for normal operation.

-> No

G258127t76 : CHECK THE ECM TO RADIATOR FAN MODULE CIRCUIT FOR HIGH RESISTANCE
1. Turn the ignition switch to the OFF position.
2. Disconnect the battery negative terminal.
3. Disconnect the ECM electrical connector, PI01.
4. Measure the resistance between GC01, pin 01 (WU) and PI01, pin 51 (W).

- Is the resistance greater than 5 ohms?

-> Yes
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

-> No

G258127t77 : CHECK THE ECM TO RADIATOR FAN MODULE CIRCUIT FOR SHORT TO HIGH VOLTAGE
1. Reconnect the battery negative terminal.
2. Turn the ignition switch to the ON position.
3. Measure the voltage between GC01, pin 01 (WU) and GROUND.

- Is the voltage greater than 3 volts?

-> Yes
REPAIR the short circuit. CLEAR the DTC. TEST the system for normal operation.

-> No

G258127t78 : CHECK THE ECM TO RADIATOR FAN MODULE CIRCUIT FOR SHORT TO GROUND
1. Turn the ignition switch to the OFF position.
2. Measure the resistance between GC01, pin 01 (WU) and GROUND.

- Is the resistance less than 10,000 ohms?

-> Yes
REPAIR the short circuit. CLEAR the DTC. TEST the system for normal operation.

-> No
INSTALL a new radiator cooling fan module. CLEAR the DTC. TEST the system for normal operation.