With 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 CAUSE
| DTC P0480:00 |
Fan control circuit |
| DETECTION CONDITION |
- This test inspect the fan control circuit. The DTC sets if the PCM detects the voltage on the fan control variable circuit is not within the expected range
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| POSSIBLE CAUSE |
- Short to ground or open circuit in fan control module relay power supply circuit
- Short to ground in wiring harness between battery positive terminal and fan control module relay (battery side)
- MAIN 125 A fuse or FAN 60 A fuse malfunction
- Open circuit in wiring harness between battery positive terminal and fan control module relay (battery side)
- Open or short circuit in wiring harness between BCM and fan control relay terminal (BCM side)
- BCM malfunction
- Fan control module control relay malfunction
- Fan control module connector or terminal malfunction
- Short to ground in wiring harness between fan control module terminal D and fan control module relay
- Short to power supply in wiring harness between fan control module terminal D and fan control module relay
- Open circuit in wiring harness between fan control module terminal A and body ground.
- Poor contact or loose installation of body ground point
- PCM connector or terminal malfunction
- Short to ground in wiring harness between fan control module terminal C and PCM terminal 1BR
- Short to power supply in wiring harness between fan control module terminal C and PCM terminal 1BR
- Open circuit in wiring harness between fan control module terminal C and PCM terminal 1BR
- Cooling fan motor No 1 malfunction
- PCM malfunction
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 Courtesy of MAZDA MOTORS CORP.
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