DTC P0579-00: Cruise Control Multi-Function Input Circuit Range/Performance Problem: Notes

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 check engine light does not illuminate. FREEZE FRAME DATA (Mode 2)/Snapshot data is not available. The DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	-
POSSIBLE CAUSE	Clock spring connector or terminals malfunction Clock spring malfunction Cruise control switch malfunction Short to ground in wiring harness between clock spring terminal 2C and PCM terminal 1AQ PCM connector or terminals malfunction Short to power supply in wiring harness between the following terminals: Clock spring terminal 2C-PCM terminal 1AQ Clock spring terminal 2E-PCM terminal 1AN Open circuit in wiring harness between the following terminals: Clock spring terminal 2C-PCM terminal 1AQ Clock spring terminal 2E-PCM terminal 1AN PCM malfunction
Courtesy of MAZDA MOTORS CORP.