DTC P0480-00: Fan Control Module Control Circuit Problem: Outline

DTC P0480:00 (PCM, VIN Y) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Fan control module control circuit problem
Detection condition	The PCM monitors the input voltage from the fan control module. If the voltage at the PCM terminal 2I remains low or high for 5 s, the PCM determines that the fan control circuit has a malfunction.
Fail-safe	Not applicable
Possible cause	Cooling fan relay malfunction Short to ground or open circuit in cooling fan relay secondary side power supply circuit F10 15 A fuse malfunction Short to ground in cooling fan relay primary side power supply circuit Open circuit in cooling fan relay primary side power supply circuit Fan control module connector or terminals malfunction Short to ground in fan control module power supply circuit Short to power supply in fan control module power supply circuit Open circuit in fan control module power supply circuit Open circuit in fan control module ground circuit PCM connector or terminals malfunction Short to ground in fan control module control circuit Short to ground in cooling fan relay control circuit Short to power supply in fan control module control circuit Short to power supply in cooling fan relay control circuit Open circuit in fan control module control circuit Open circuit in cooling fan relay control circuit Fan control module malfunction PCM malfunction
Courtesy of MAZDA MOTORS CORP.