DTC P0480 [L3]

BME010200400W04

DTC P0480

Fan control circuit malfunction

DETECTION CONDITION

• PCM monitors the fan control signal at PCM terminal 1U. If PCM sends signal to fan control module but voltage at terminal 1U does not change, PCM determines that fan control circuit has malfunction.

POSSIBLE CAUSE

• Fan control module malfunction
• Connector or terminal malfunction
• Open circuit in wiring between fan control module terminal 1B and PCM terminal 1U
• Short to power circuit between fan control module terminal 1B and PCM terminal 1U
• Short to ground in wiring between fan control module terminal 1B and PCM terminal 1U
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
PERFORM DTC CONFIRMATION PROCEDURE
• Perform DTC CONFIRMATION PROCEDURE.
• Is same DTC present?
Yes
Go to next step.
No
Intermittent concern exists. Go to INTERMITTENT CONCERN TROUBLESHOOTING procedure.
2
INSPECT FAN CONTROL MODULE CONNECTOR FOR POOR CONNECTION
• Turn ignition key to OFF.
• Disconnect fan control module connector.
• Check for poor connection (damaged/pulled-out pins, corrosion, etc.).
• Is there any malfunction?
Yes
Repair or replace terminal, then go to Step 8.
No
Go to next step.
3
INSPECT FAN CONTROL MODULE
• Perform fan control module inspection.
• Is fan control module okay?
Yes
Go to next step.
No
Replace fan control module, then go to Step 8.
4
INSPECT FAN CONTROL MODULE SIGNAL CIRCUIT FOR SHORT TO POWER
• Measure voltage between fan control module connector terminal 1B and body ground.
• Is voltage B+?
Yes
Repair or replace harness for short to power, then go to Step 8.
No
Go to next step.
5
INSPECT FAN CONTROL MODULE SIGNAL CIRCUIT FOR SHORT TO GROUND
• Inspect continuity between fan control module terminal 1B and body ground.
• Is there continuity?
Yes
Repair or replace harness for short to ground, then go to Step 8.
No
Go to next step.
6
INSPECT PCM CONNECTOR FOR POOR CONNECTION
• Inspect for poor connection (damaged/pulled-out pins, corrosion, etc.).
• Is there any malfunction?
Yes
Repair or replace terminal and/or connector, then go to Step 8.
No
Go to next step.
7
INSPECT FAN CONTROL MODULE SIGNAL CIRCUIT FOR OPEN CIRCUIT
• Inspect continuity between fan control module terminal 1B and PCM terminal 1U.
• Is there continuity?
Yes
Go to next step.
No
Repair or replace harness for open, then go to next step.
8
VERIFY TROUBLESHOOTING OF DTC P0480 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear DTC from PCM memory using WDS or equivalent.
• Perform KOEO/KOER self-test.
• Is same DTC present?
Yes
Replace PCM, then go to next step.
No
Go to next step.
9
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to applicable DTC troubleshooting.
No
Troubleshooting completed.