Mazda 3 Workshop Manual page 164

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
DTC P0550
DETECTION
CONDITION
POSSIBLE CAUSE
Downloaded from
PSP switch circuit problem
• The PCM monitors the input signal from the PSP switch. If the input signal
does not change for 1 min, the PCM determines that the PSP switch circuit
problem.
• The PCM monitors the input voltage from the PSP switch when the
following conditions are met. If the input voltage is low for 1 min, the PCM
determines that the PSP switch circuit problem.
MONITORING CONDITION
- Vehicle speed is more than 60 km/h {37.3 mph}.
- ECT is more than 60 °C {140 °F}.
Diagnostic support note
• This is a continuous monitor (CCM).
• The MIL illuminates if the PCM detects the above malfunction condition in
two consecutive drive cycles or in one drive cycle while the DTC for the
same malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction
condition during the first drive cycle.
• FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.
• PSP switch malfunction
• Connector or terminal malfunction
• Open circuit in wiring harness between PSP switch terminal A and PCM
terminal 2AC
• Short to power supply in wiring harness between PSP switch terminal A
and PCM terminal 2AC
• Short to GND in wiring harness between PSP switch terminal A and PCM
terminal 2AC
• PCM malfunction
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