DTC P0480 00: Cooling Fan Relay No. 1 Control Circuit Malfunction: Notes

DTC P0480:00 DETECTION CONDITIONS AND POSSIBLE CAUSES (SKYACTIV-G 2.0, SKYACTIV-G 2.5)

DTC P0480:00	Cooling fan relay No. 1 control circuit malfunction
DETECTION CONDITION	The cooling fan relay No. 1 control voltage at the PCM terminal 2AU is low or cooling fan relay No. 1 control current is high for a continuous 5 s relative to the PCM control signal. Diagnostic support note This is a continuous monitor (other). The check engine light does not illuminate. FREEZE FRAME DATA (Mode 2) is not available. Snapshot data is available. DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	Not applicable
POSSIBLE CAUSE	Cooling fan relay No. 1 malfunction Short to ground or open circuit in cooling fan relay No. 1 power supply circuit Short to ground in wiring harness between ENGINES 15 A fuse and cooling fan relay No. 1 terminal A ENGINE3 15 A fuse malfunction Open circuit in wiring harness between main relay terminal D and cooling fan relay No. 1 terminal A Short to ground in wiring harness between cooling fan relay No. 1 terminal E and PCM terminal 2AU PCM connector or terminals malfunction Short to power supply in wiring harness between cooling fan relay No. 1 terminal E and PCM terminal 2AU Open circuit in wiring harness between cooling fan relay No. 1 terminal E and PCM terminal 2AU PCM malfunction
Courtesy of MAZDA MOTORS CORP.