DTC P0481-00: Cooling Fan Relay No.L And No. 3 Control Circuit Malfunction: Notes

DTC P0481-00: (PCM, VIN M) DETECTION CONDITION AND POSSIBLE CAUSE

DTC P0481-00:	Cooling fan relay No.l and No. 3 control circuit malfunction
DETECTION CONDITION	The cooling fan relay No.l and No. 3 control voltage at the PCM terminal 2AS is low or cooling fan relay No.l and No. 3 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 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 and/or No. 3 malfunction Short to ground or open circuit in cooling fan relay No. 1 and/or No. 3 power supply circuit Short to ground in wiring harness between the following terminals: ENGINE3 15 A fuse-Cooling fan relay No. 1 terminal A ENGINE3 15 A fuse-Cooling fan relay No. 3 terminal A ENGINE3 15 A fuse malfunction Open circuit in wiring harness between the following terminals: Sub relay terminal C-Cooling fan relay No.l terminal A Sub relay terminal C-Cooling fan relay No. 3 terminal A Short to ground in wiring harness between the following terminals: Cooling fan relay No.l terminal E-PCM terminal 2AS Cooling fan relay No. 3 terminal E-PCM terminal 2AS PCM connector or terminals malfunction Short to power supply in wiring harness between the following terminals: Cooling fan relay No.l terminal E-PCM terminal 2AS Cooling fan relay No. 3 terminal E-PCM terminal 2AS Open circuit in wiring harness between the following terminals: Cooling fan relay No. 1 terminal E-PCM terminal 2AS Cooling fan relay No. 3 terminal E-PCM terminal 2AS PCM malfunction
Courtesy of MAZDA MOTORS CORP.