DTC P0480-00: Cooling Fan Control Circuit Malfunction: Notes

DTC P0480:00 DETECTION CONDITION AND POSSIBLE CAUSE

DTC P0480:00	Cooling fan control circuit malfunction
DETECTION CONDITION	The PCM monitors the input voltage from the fan control module. If the voltage at the PCM terminal 2AQ 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 check engine light does not illuminate. FREEZE FRAME DATA is not available. Snapshot data is available. DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	Not applicable
POSSIBLE CAUSE	Fan control module connector or terminals malfunction Cooling fan relay malfunction Short to ground or open circuit in cooling fan relay power supply circuit Short to ground in wiring harness between FAN 80 A fuse and cooling fan relay terminal A FAN 80 A fuse malfunction Open circuit in wiring harness between battery positive terminal and cooling fan relay terminal A Short to ground or open circuit in cooling fan relay power supply circuit Short to ground in wiring harness between ENGINE 3 15 A fuse and cooling fan relay terminal B ENGINE3 15 A fuse malfunction Open circuit in wiring harness between main relay terminal C and cooling fan relay terminal B Open circuit in wiring harness between fan control module terminal A and body ground Short to ground in wiring harness between cooling fan relay terminal C and fan control module terminal D Open circuit in wiring harness between cooling fan relay terminal C and fan control module terminal D PCM connector or terminals malfunction Short to ground in wiring harness between the following terminals: Fan control module terminal C-PCM terminal 2AQ Cooling fan relay terminal D-PCM terminal 2BA Short to power supply in wiring harness between fan control module terminal C and PCM terminal 2AQ Open circuit in wiring harness between the following terminals: Fan control module terminal C-PCM terminal 2AQ Cooling fan relay terminal D-PCM terminal 2BA Fan control module malfunction PCM malfunction
Courtesy of MAZDA MOTORS CORP.