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 DTC P0480 [L3 Turbo]

DTC P0480 [L3 Turbo]

id0102b7807400

DTC P0480

Fan control circuit problem

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

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.
• 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.
No
Go to the next step.
10
VERIFY AFTER REPAIR PROCEDURE
• Perform the "AFTER REPAIR PROCEDURE".
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.