Mazda 3 Workshop Manual page 389

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
POSSIBLE CAUSE
Diagnostic procedure
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The PCM determines that the variable tumble shutter valve has been stuck
closed.
MONITORING CONDITIONS
- Engine coolant temperature is above 70 °C {158 °F}.
- Engine speed is 3,500 rpm or more.
- Throttle valve opening angle is above 75 %.
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 first drive cycle.
• FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.
• ECT sensor malfunction
• TP sensor malfunction
• CKP sensor malfunction
• Variable tumble solenoid valve malfunction
• Variable tumble shutter valve malfunction (stuck closed)
• Variable tumble shutter valve actuator malfunction (stuck closed)
• Short to ground in wiring harness between variable tumble solenoid valve
terminal B and PCM terminal 2AI
• PCM malfunction
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