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F–36 CONTROL SYSTEM Operation Conditions • The PCM turns the VTCS solenoid valve ON to close the VTCS shutter valve in the intake manifold when all of Below 1,500 rpm: CTP — ECT below 63 ° C [145 ° F] • The PCM turns the VTCS solenoid valve OFF for maintaining the startability and stability during the engine End Of Sie VARIABLE VALVE TIMING CONTROL A6E394018881T11 Outline • The variable valve timing control of the Mazda6 (GG) is essentially carried over from the current MX-5 (NB) Execution condition • When all of the following conditions are met. ° C [176 ° F] Maximum cam retard mode • When any of the following conditions are met. ° C [64 ° F] — Target valve timing: 0 End Of Sie FUEL INJECTION CONTROL A6E394018881T12 Outline • There are two types of injection timing control: “synchronized injection” and “non-synchronized injection.” • BARO and rear oxygen sensor feedback correction has been added. Injection Timing • PCM determines fuel injection timing and amount synchronized with the crank angle, and based on the Non-synchronized injection • PCM determines fuel injection timing and amount based on the following signals (not synchronized with the Correction • Purpose: to maintain the engine stability • Conditions: at all time • Action: lower BARO, larger correction Rear HO2S feedback correction • Purpose: to control air/fuel ratio close to increase the performance of the catalytic converter • Conditions: at feedback zone • Action: Rear HO2S output voltage End Of Sie A/C CUT-OFF CONTROL A6E394018881T13 Outline • The A/C cut-off control of the Mazda6 (GG) is essentially carried over from the current MPV (LW) FS engine |