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

WARNING: This page is about a different variant/trim than selected.

DTC P0480:00 (PCM, VIN Y) 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 No. 1 connector or terminals malfunction Fan control module No. 2 connector or terminals malfunction Cooling fan relay No. 1 and/or No. 2 malfunction Short to ground or open circuit in cooling fan relay No. 1 power supply circuit Short to ground in wiring harness between FAN 50 A fuse and cooling fan relay No. 1 terminal A FAN 50 A fuse malfunction Open circuit in wiring harness between battery positive terminal and cooling fan relay No. 1 terminal A Short to ground or open circuit in cooling fan relay No. 2 power supply circuit Short to ground in wiring harness between ADD FAN 50 A fuse and cooling fan relay No. 2 terminal A ADD FAN 50 A fuse malfunction Open circuit in wiring harness between battery positive terminal and cooling fan relay No. 2 terminal A Short to ground or open circuit in cooling fan relay No. 1 and/or No. 2 power supply circuit Short to ground in wiring harness between the following terminals: ENGINE3 15 A fuse-Cooling fan relay No. 1 terminal B ENGINE3 15 A fuse-Cooling fan relay No. 2 terminal B ENGINE3 15 A fuse malfunction Open circuit in wiring harness between the following terminals: Main relay terminal C-Cooling fan relay No. 1 terminal B Main relay terminal C-Cooling fan relay No. 2 terminal B Open circuit in wiring harness between fan control module No. 1 terminal A and body ground Open circuit in wiring harness between fan control module No. 2 terminal A and body ground Short to ground in wiring harness between the following terminals: Cooling fan relay No. 1 terminal C-Fan control module No. 1 terminal D Cooling fan relay No. 2 terminal C-Fan control module No. 2 terminal D Open circuit in wiring harness between the following terminals: Cooling fan relay No. 1 terminal C-Fan control module No. 1 terminal D Cooling fan relay No. 2 terminal C-Fan control module No. 2 terminal D PCM connector or terminals malfunction Short to ground in wiring harness between the following terminals: Fan control module No. 1 terminal C-PCM terminal 2AQ Fan control module No. 2 terminal C-PCM terminal 2AQ Cooling fan relay No. 1 terminal D-PCM terminal 2BA Cooling fan relay No. 2 terminal D-PCM terminal 2BA Short to power supply in wiring harness between the following terminals: Fan control module No. 1 terminal C-PCM terminal 2AQ Fan control module No. 2 terminal C-PCM terminal 2AQ Open circuit in wiring harness between the following terminals: Fan control module No. 1 terminal C-PCM terminal 2AQ Fan control module No. 2 terminal C-PCM terminal 2AQ Cooling fan relay No. 1 terminal D-PCM terminal 2BA Cooling fan relay No. 2 terminal D-PCM terminal 2BA Fan control module No. 1 and/or No. 2 malfunction PCM malfunction
Courtesy of MAZDA MOTORS CORP.