#
FUEL INJECTION CONTROL

id014000101700

## Outline

• The function of the fuel injection control is essentially carried over from that of the previous Mazda 121 121DEMIO (DW) models except for the following:

  - Fuel cut control

## Fuel Cut

• Other than for fuel cut related to excess engine speed and deceleration that occur depending on the engine operation condition, fuel cut occurs under the following conditions:

### Excessive vehicle speed fuel cut (ZY)

Purpose

  • To prevent excess vehicle speed

Execution condition

  • When engine speed is 4,000 rpm or more and vehicle speed is 170 km {105 mph} or more.

### Fuel cut during shifting (ATX)

Purpose

  • To reduce shift shock during shifting

Execution condition

  • During shifting (Fuel cut occurs on 1st and 4th cylinders.)

### Fuel cut when sensor is damaged

Purpose

  • To prevent damage to the engine by abnormal firing from abnormal input of cylinder-distinct and engine rotation signals

Execution condition

  • Damage to CKP sensor or the CMP sensor is detected

### De-choke control

Purpose

  • To improve engine startability during wet-fouling of the spark plugs

Execution condition

  • Cranking the engine when the throttle valve approaches fully open.