P0480

P0480-COOLING FAN 1 CONTROL CIRCUIT

P0480 - Cooling Fan 1 Control Circuit:

WHEN MONITORED:
With the ignition on. Battery voltage greater than 10 volts.

SET CONDITION:
The PCM is requesting the TIPM to turn on the Condenser Fan On and it is not operating. One Trip Fault. Three good trips to turn off the MIL.

POSSIBLE CAUSES
- CAN C BUS failure
- Engine coolant temp sensor DTC's set
- Condenser fan control circuit DTC's set in the HVAC module
- PCM

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

DIAGNOSTIC TEST

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

Q: Is the Cooling Fan Relay operating?

YES: Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Component Tests and General Diagnostics
Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test
NO: Go To 2

2. ECT DTC'S CURRENTLY ACTIVE

Q: Are any CAN C or ECT DTC's active at this time?

YES: Refer to the appropriate diagnostics for the ECT Sensor or CAN C Bus DTC's
NO: Go To 3

3. CONDENSER FAN CONTROL CIRCUIT DTC'S SET IN THE TIPM

Q: Are any Condenser Fan Control Circuit DTC's set in the TIPM?

YES: Diagnose the appropriate Condenser Fan Control Circuits in the TIPM
NO: Go To 4

4. PCM

NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.

Q: Were there any problems found?

YES: Repair as necessary. Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test
NO: Replace and program the Powertrain Control Module. Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test