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Home >> Mazda >> 2013 >> 6 i Grand Touring >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic [Engine Control System MZR 2.5] >> DTC P0480:00 >> Notes
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DTC P0480:00: Notes

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 (Mode2)/Snapshot data is not available.
  • The DTC is stored in the PCM memory.
POSSIBLE CAUSE 
  • Short to ground or open circuit in fan control module relay secondary power supply circuit
    • Short to ground in wiring harness between battery positive terminal and fan control module relay terminal A
    • MAIN 125 A fuse and/or FAN 60 A fuse malfunction
    • Open circuit in wiring harness between battery positive terminal and fan control module relay terminal A
  • Short to ground or open circuit in fan control module relay primary power supply circuit
    • Short to ground in wiring harness between ignition switch terminal C(1)/relay block terminal 1B(2) and fan control module relay terminal D
    • ENGINE IG 15 A fuse malfunction
    • Open circuit in wiring harness between ignition switch terminal C(1)/relay block terminal 1B(2) and fan control module relay terminal D
  • Open circuit in wiring harness between fan control module relay terminal B and body ground
  • Poor contact or loose installation of fan control module relay primary circuit
  • Fan control module relay malfunction
  • Fan control module connector or terminals malfunction
  • Short to ground in wiring harness between fan control module relay terminal C and fan control module terminal 1C
  • Open circuit in wiring harness between fan control module relay terminal C and fan control module terminal 1C
  • Open circuit in wiring harness between fan control module terminal 1A and body ground
  • Poor contact or loose installation of fan control module ground point.
  • Short to ground in wiring harness between fan control module terminal 1B and PCM terminal 1R
  • PCM connector or terminals malfunction
  • Short to power supply in wiring harness between fan control module terminal 1B and PCM terminal 1R
  • Open circuit in wiring harness between fan control module terminal 1B and PCM terminal 1R
  • Fan control module malfunction
  • PCM malfunction
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(1) Vehicles without advanced keyless entry and push button start system 
(2) Vehicles with advanced keyless entry and push button start system 
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