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 1AE
•  Short to ground in the wiring harness between fan control module terminal 1B and PCM terminal 1AE
•  Open circuit in the wiring harness between fan control module terminal 1B and PCM terminal 1AE
•  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 SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform the 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 1AE.
•  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 M-MDS.
•  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”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE[L3 Turbo].)
No
Troubleshooting completed.