DTC P0480 [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed))

BME010200400W05

DTC P0480

Fan control circuit malfunction

DETECTION CONDITION

• PCM monitors input voltages from fan control module. If voltage at PCM terminal 69 remains low or high, PCM determines that fan control circuit has malfunction.
Diagnostic support note
• This is an continuous monitor (other).
• The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
• PENDING CODE is available if the PCM detects the above malfunction condition.
• FREEZE FRAME DATA is not available.
• DTC is stored in the PCM memory.

POSSIBLE CAUSE

• Connector or terminal malfunction
• Short to power circuit between fan control module terminal B and PCM terminal 69
• Short to ground in wiring between fan control module terminal B and PCM terminal 69
• Open circuit in wiring between fan control module terminal B and PCM terminal 69
• Fan control module malfunction
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Check for related Service Information availability.
• Is any related Service Information available?
Yes
Perform repair or diagnosis according to available Service Information.
• If vehicle is not repaired, go to next step.
No
Go to next step.
2
INSPECT FAN CONTROL MODULE CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect fan control module connector.
• Check for poor connection (damaged/pulled-out pins, corrosion, etc.).
• Is there malfunction?
Yes
Repair or replace terminal, then go to Step 8.
No
Go to next step.
3
INSPECT FAN CONTROL MODULE SIGNAL CIRCUIT FOR SHORT TO POWER
• Turn the ignition switch to ON (Engine OFF).
• Measure voltage between fan control module connector terminal B and body ground.
• Is voltage B+?
Yes
Repair or replace harness for open, then go to Step 8.
No
Go to next step.
4
INSPECT FAN CONTROL MODULE SIGNAL CIRCUIT FOR SHORT TO GROUND
• Turn the ignition switch off.
• Check continuity between fan control module terminal B and body ground.
• Is there continuity?
Yes
Repair or replace harness for open, then go to Step 8.
No
Go to next step.
5
INSPECT PCM CONNECTOR FOR POOR CONNECTION
• Check for poor connection (damaged/pulled-out pins, corrosion, etc.).
• Is there malfunction?
Yes
Repair or replace terminal, then go to Step 8.
No
Go to next step.
6
INSPECT FAN CONTROL MODULE SIGNAL CIRCUIT FOR OPEN CIRCUIT
• Check continuity between fan control module terminal B and PCM terminal 69.
• Is there continuity?
Yes
Go to next step.
No
Repair or replace harness for open, then go to Step 8.
7
INSPECT FAN CONTROL MODULE
• Perform fan control module inspection.
• Is fan control module normal?
Yes
Go to next step.
No
Replace fan control module, then go to next step.
8
VERIFY TROUBLESHOOTING OF DTC P0480 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Turn the ignition switch off then start engine.
• Is PENDING CODE of 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 inspection.
No
Troubleshooting completed.