DTC P0480 [MZ-CD 1.6 (Y6)]

id0102c3807400

DTC P0480

Fan control circuit malfunction
DETECTION CONDITION
•  The PCM monitors the fan control signal at PCM terminal 318. If the PCM sends signal to fan control module but voltage at terminal 318 does not change, the PCM determines that fan control circuit has malfunctioned.
POSSIBLE CAUSE
•  Fan control module malfunction
•  Connector or terminal malfunction
•  Open circuit in wiring from fan control module terminal 1C to PCM terminal 318
•  Short to ground in wiring from fan control module terminal 1C to PCM terminal 318
•  Short to power in wiring from fan control module terminal 1C to PCM terminal 318
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has the 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 REPAIR INFORMATION AVAILABILITY
•  Verify related service repair information availability.
•  Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair information.
If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
INSPECT POOR CONNECTION OF FAN CONTROL MODULE CONNECTOR
•  Turn the engine switch off.
•  Disconnect fan control module connector.
•  Check for poor connection at fan control module terminal 1C (damaged, pulled-out terminal, corrosion, etc.).
•  Is there any malfunction?
Yes
Repair or replace terminal and/or connector, then go to Step 9.
No
Go to next step.
4
CHECK FAN CONTROL MODULE
•  Inspect fan control module.
•  Is fan control module okay?
Yes
Go to next step.
No
Replace fan control module, then go to Step 9.
5
CHECK FAN CONTROL CIRCUIT FOR SHORT TO POWER
•  Measure voltage between fan control module terminal 1C (harness-side) and body ground.
•  Is voltage B+?
Yes
Repair or replace harness for short to power, then go to Step 9.
No
Go to next step.
6
CHECK FAN CONTROL CIRCUIT FOR SHORT TO GROUND
•  Check for continuity between fan control module terminal 1C (harness-side) and body ground.
•  Is there continuity?
Yes
Repair or replace harness for short to ground, then go to Step 9.
No
Go to next step.
7
INSPECT POOR CONNECTION OF PCM CONNECTOR
•  Turn the engine switch off.
•  Disconnect PCM connector.
•  Check for poor connection at PCM terminal 318 (damaged, pulled-out terminal, corrosion, etc.).
•  Is there any malfunction?
Yes
Repair or replace terminal and/or connector, then go to Step 9.
No
Go to next step.
8
CHECK FAN CONTROL CIRCUIT FOR OPEN
•  Check for continuity between fan control module terminal 1C (harness-side) and PCM terminal 318 (harness-side).
•  Is there continuity?
Yes
Go to next step.
No
Repair or replace harness for open, then go to next step.
9
VERIFY THAT DTC P0480 TROUBLESHOOTING IS COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine and warm-up to normal operating temperature.
•  Retrieve the DTC using the M-MDS.
•  Is the PENDING CODE same DTC present?
Yes
Replace PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].)
No
Go to the next step.
10
VERIFY AFTER REPAIR PROCEDURE
•  Perform "After Repair Procedure".
•  Is there any DTC present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZ-CD 1.6 (Y6)].)
No
Troubleshooting completed.