Without Fan Control Module Relay
WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DETECTION CONDITION & POSSIBLE CAUSES
| DTC P0480:00 |
Cooling fan control circuit problem |
| DETECTION CONDITION |
- The PCM monitors the input voltages from the cooling fan motor If the voltage at the PCM terminal 1R remains low or high, the PCM determines that the cooling fan control circuit has malfunction.
Diagnostic support note
- This is a continuous monitor (other)
- The MIL does not illuminate
- FREEZE FRAME DATA is not available
- The DTC is stored in the PCM memory
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| POSSIBLE CAUSE |
- Fuse malfunction
- MAIN 125 A fuse
- FAN 60 A fuse
- Cooling fan motor No. 1 connector or terminal malfunction
- Open circuit in wiring harness between battery positive terminal and cooling fan motor No. 1 terminal D
- PCM connector or terminal malfunction
- Short to ground in wiring harness between cooling fan motor No. 1 terminal C and PCM terminal 1R
- Short to power supply in wiring harness between cooling fan motor No. 1 terminal C and PCM terminal 1R
- Cooling fan motor No 1 malfunction
- Open circuit in wiring harness between cooling fan motor No 1 terminal C and PCM terminal 1R
- PCM malfunction
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 Courtesy of MAZDA MOTORS CORP.
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