P0480

P0480-COOLING FAN 1 CONTROL CIRCUIT







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

- Set Condition:
An open or shorted circuit is detected in the Low/High Rad Fan Control circuit. One Trip Fault. Three good trips to turn off the MIL.





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

1. COOLING FAN RELAY OPERATION
1. Ignition on, engine not running.
2. With a scan tool, actuate the Cooling Fan through the PCM Actuators.

Is the Cooling Fan operating?

Yes

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

No

- Go To 2

2. CAN C or ECT DTCS CURRENTLY ACTIVE

Are any CAN C or ECT DTCs Active at this time?

Yes

- Refer to the appropriate diagnostics for the ECT Sensor or CAN C Bus DTC.

No

- Go To 3

3. COOLING FAN CONTROL CIRCUIT DTCS SET IN THE TIPM

Are any Cooling Fan Control Circuit DTCs set in the TIPM?

Yes

- Diagnose the appropriate Cooling Fan Control Circuit DTC in the TIPM.

No

- Go To 4

4. POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Relay, Totally Integrated Power Module (TIPM), and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Relay, Totally Integrated Power Module (TIPM), and the Powertrain Control Module (PCM) connectors.
4. Search for any Technical Service Bulletins that may apply.

Were there any problems found?

Yes

- Repair as necessary.
- Perform the PCM Verification Test. PCM Verification Test

No

- Replace and program the Powertrain Control Module.
- Perform the PCM Verification Test. PCM Verification Test