Powertrain Control Module (PCM)

P0480-COOLING FAN 1 CONTROL CIRCUIT





For a complete wiring diagram, refer to the Wiring Information. Electrical Diagrams

- When Monitored:
With the ignition on and the battery voltage greater than 10 volts.

- Set Condition:
The Powertrain Control Module (PCM) receives a Controller Area Network (CAN) Bus message from the Totally Integrated Power Module (TIPM) with TIPM indicating an open or shorted circuit on the Radiator Fan Relay Control circuit. One Trip Fault. Three good trips to turn off the Malfunction Indicator Lamp (MIL).





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.

1. RADIATOR FAN CONTROL RELAY OPERATION

NOTE: When actuating the radiator fan relays, the radiator fan(s) may have a delay in operation and ramp up slowly.

1. Turn the ignition on.
2. Using a scan tool, select Radiator Cooling Fan Relay #1 Control State to actuate the Radiator Fan Control Relay.

Is the Radiator Cooling Fan Relay operating?

Yes

- Refer to CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. Checking for an Intermittent DTC.

No

- Go To 2

2. FUSED B(+) CIRCUITS




1. Turn the ignition off.
2. Remove the Radiator Fan Control Relay.
3. Using a 12-volt test light connected to ground, check the Fused B(+) circuits.

Is the test light illuminated and bright?

Yes

- Go To 3

No

- Repair the open or short to ground in the Fused B(+) circuits. Inspect the related fuse and repair as necessary.
- Perform the BODY VERIFICATION TEST. Body Verification Test

3. (N24) RADIATOR FAN CONTROL RELAY OUTPUT CIRCUIT




1. Turn the ignition on, engine not running.
2. Using a scan tool, actuate the Radiator Cooling Fan Relay #1 Control State.
3. Using a 12 Volt test light connected to battery voltage, check the (N24) Radiator Control Relay Output circuit.

Does the test light illuminate with the actuation?

Yes

- Replace the Radiator Fan Control Relay.
- Perform the BODY VERIFICATION TEST. Body Verification Test

No

- Replace the TIPM.
- Perform the BODY VERIFICATION TEST. Body Verification Test