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DTC P0480 [L3 Turbo]

id0102b7807400

DTC P0480 | Fan control circuit problem
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DETECTION CONDITION | • The PCM monitors the input voltage from the fan control module. If the voltage remains low or high, the PCM determines that the fan control circuit has a malfunction. Diagnostic support note • This is a continuous monitor (Other). • The MIL does not illuminate. • FREEZE FRAME DATA is not available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE | • Fan control module malfunction • Connector or terminal malfunction • Short to the power supply in the wiring harness between fan control module terminal 1B and PCM terminal 4A • Short to ground in the wiring harness between fan control module terminal 1B and PCM terminal 4A • Open circuit in the wiring harness between fan control module terminal 1B and PCM terminal 4A • PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded? | Yes | Go to the next step.
No | Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2 | VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available? | Yes | Perform repair or diagnosis according to the available Service information. If the vehicle is not repaired, go to the next step.
No | Go to the next step.
3 | INSPECT FAN CONTROL MODULE CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the fan control module connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction? | Yes | Repair or replace the terminal, then go to Step 9.
No | Go to the next step.
4 | INSPECT FAN CONTROL MODULE SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Turn the ignition switch to the ON position (Engine off). • Measure the voltage between fan control module terminal 1B (wiring harness-side) and body ground. • Is the voltage B+? | Yes | Repair or replace the wiring harness for an open circuit, then go to Step 9.
No | Go to the next step.
5 | INSPECT FAN CONTROL MODULE SIGNAL CIRCUIT FOR SHORT TO GROUND • Turn the ignition switch off. • Inspect for continuity between fan control module terminal 1B (wiring harness-side) and body ground. • Is there continuity? | Yes | Repair or replace the wiring harness for an open circuit, then go to Step 9.
No | Go to the next step.
6 | INSPECT PCM CONNECTOR FOR POOR CONNECTION • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction? | Yes | Repair or replace the terminal, then go to Step 9.
No | Go to the next step.
7 | INSPECT FAN CONTROL MODULE SIGNAL CIRCUIT FOR OPEN CIRCUIT • Inspect for continuity between fan control module terminal 1B (wiring harness-side) and PCM terminal 4A. • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for an open circuit, then go to Step 9.
8 | INSPECT FAN CONTROL MODULE • Perform the fan control module inspection. (See Cooling Fan Control System Inspection.) • Is the fan control module normal? | Yes | Go to the next step.
No | Replace the fan control module, then go to the next step.
9 | VERIFY TROUBLESHOOTING OF DTC P0480 COMPLETED • Clear the DTC from the PCM memory using the WDS or equivalent. • Start the engine. • Turn A/C switch to ON. • Is the same DTC present? | Yes | Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [L3 Turbo].)
No | Go to the next step.
10 | VERIFY AFTER REPAIR PROCEDURE • Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE [L3 Turbo].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [L3 Turbo].)
No | Troubleshooting completed.