DTC P0480 [ZJ, Z6]

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DTC P0480 [ZJ, Z6]

B3E010200400W04

DTC P0480 | Cooling fan control circuit problem
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DETECTION CONDITION

• The PCM monitors input voltage from the fan control module. If the voltage at PCM terminal 1AP remains low or high, the PCM determines that there is a cooling fan control circuit problem.
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
• Open circuit in wiring harness between fan control module terminal C and PCM terminal 1AP
• Short to power supply in wiring harness between fan control module terminal C and PCM terminal 1AP
• Short to GND in wiring harness between fan control module terminal C and PCM terminal 1AP
• PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA 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 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 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 GND • Turn the ignition switch off. • Inspect for continuity between fan control module terminal C (wiring harness-side) and body GND. • Is there continuity? | Yes | Repair or replace the wiring harness for a possible short to GND, then go to Step 9.
No | Go to the next step.
5 | 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 C (wiring harness-side) and body GND. • Is the voltage B+? | Yes | Repair or replace the wiring harness for a possible short to power supply, then go to Step 9.
No | Go to the next step.
6 | INSPECT FAN CONTROL MODULE • Inspect the fan control module. (See COOLING FAN MOTOR COMPONENT INSPECTION.) • Is there any malfunction? | Yes | Replace the cooling fan component, then go to Step 9. (See RADIATOR REMOVAL/INSTALLATION.)
No | Go to the next step.
7 | INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the PCM 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.
8 | INSPECT FAN CONTROL MODULE SIGNAL CIRCUIT FOR OPEN CIRCUIT • Turn the ignition switch off. • Inspect for continuity between fan control module terminal C (wiring harness-side) and PCM terminal 1AP (wiring harness-side). • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for a possible open circuit, then go to the next step.

9

VERIFY TROUBLESHOOTING OF DTC P0480 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Start the engine.
• Turn the A/C switch on to operate the cooling fan motor.
• Is the same DTC present?

Yes

Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [ZJ, Z6].)

No | Go to the next step.
10 | VERIFY AFTER REPAIR PROCEDURE • Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE [ZJ, Z6].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [ZJ, Z6].)
No | DTC troubleshooting completed.