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DTC P0579:00: Notes

DTC P0579:00 (LF, L5) DETECTION CONDITION AND POSSIBLE CAUSE

DTC P0579:00 Cruise control multi-function input circuit range/performance problem
DETECTION CONDITION 
  • The PCM monitors the input signal from the cruise control switch. If the input signal does not change for 120 s  , the PCM determines that the cruise control switch 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 
  • Clock spring connector or terminals malfunction
  • Cruise control switch connector or terminals malfunction
  • Clock spring malfunction
  • Cruise control switch malfunction
  • Short to ground in wiring harness between cruise control switch terminal K and PCM terminal 1AQ
  • PCM connector or terminals malfunction
  • Short to power supply in wiring harness between the following terminals:
    • Cruise control switch terminal K-PCM terminal 1AQ
    • Cruise control switch terminal M-PCM terminal 1AN
  • Open circuit in wiring harness between the following terminals:
    • Cruise control switch terminal K-PCM terminal 1AQ
    • Cruise control switch terminal M-PCM terminal 1AN
  • PCM malfunction
G06733870Courtesy of MAZDA MOTORS CORP.
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