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DTC P0480:00: Notes

DTC P0480:00 (L3 WITH TC) DETECTION CONDITION & POSSIBLE CAUSES

DTC P0480:00 Cooling fan control circuit problem
DETECTION CONDITION 
  • The PCM monitors the input voltage from the fan control module. If the voltage 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 MIL does not illuminate.
  • FREEZE FRAME DATA (Mode 2)/Snapshot data is not available.
  • The DTC is stored in the PCM memory.
POSSIBLE CAUSE 
  • Fan control module connector or terminals malfunction
  • Short to ground or open circuit in fan control module power supply circuit
    • Short to ground in wiring harness between battery positive terminal and fan control module terminal 1D
    • FAN1 40 A fuse and/or FAN2 40 A fuse malfunction
    • Open circuit in wiring harness between battery positive terminal and fan control module terminal 1D
  • Short to ground in wiring harness between fan control module terminal 1C and PCM terminal 1AE
  • PCM connector or terminals malfunction
  • Short to power supply in wiring harness between fan control module terminal 1C and PCM terminal 1AE
  • Open circuit in wiring harness between fan control module terminal 1C and PCM terminal 1AE
  • Fan control module malfunction
  • PCM malfunction
G06731665Courtesy of MAZDA MOTORS CORP.
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