Mazda 2006 MX-5 Service Highlights page 147

Purpose: Improved engine output, decrease of exhaust gas
temperature
Correction condition
• According to engine speed when the throttle valve opening
High load volume
increase correction
Correction amount
• High engine speed, high charging efficiency→large correction
Purpose: When engine coolant temperature is low, maintains
combustion stability
Correction condition
Warm-up volume
• While at set engine coolant temperature
increase correction
Correction amount
• High charging efficiency, low engine coolant temperature→large
Purpose: Maintains engine speed stability during A/C operation
Correction condition
A/C load increase
• A/C is operating
correction
Correction amount
• Low engine coolant temperature→large correction
Purpose: Corrects fuel injection delay during acceleration to ensure
drive stability
Correction condition
• When acceleration amount (change in the amount of charging
Acceleration increase
correction
Correction amount
• Low engine coolant temperature→large correction
• Large acceleration amount→large correction
Purpose: Ensures engine speed stability after fuel cut recovery
Correction condition
Deceleration volume
• When recovery from fuel cut
increase correction
Correction amount
• Low engine speed→large correction
Purpose: Corrects deviation in air/fuel ratio from changes due to
aged deterioration of mechanical devices
Correction condition
Learning correction
• Under any condition except purge control
Correction amount
• Learning value based on average of feedback correction value
Purpose: Corrects ineffective charging time deviation from change
in intake manifold vacuum
Correction condition
Intake air pressure
• Under any condition except start zone
correction
Correction amount
• More intake manifold vacuum→large correction
Fuel Cut
• Includes fuel cut under the following conditions except fuel cut at excessive engine speed according to engine
operation and deceleration fuel cut.
Sensor damage fuel cut
Purpose
• To prevent engine damage from abnormal ignition due to a malfunction input of a cylinder identification or the
engine speed signal.
Control condition
• When damage to the crankshaft position sensor or camshaft position sensor is detected.
Dechoke control
Purpose
• To improve engine starting startability when spark plugs are flooded.
Control conditions
• When cranking close to fully-open throttle valve
CONTROL SYSTEM
angle is the fixed value or more, otherwise, according to engine
speed and charging efficiency
correction
efficiency) is at set value or more
B
01–40
B B
B B
B B
B
B B
B B
01–40–23