P1500

CIRCUIT DESCRIPTION
When the engine is cranked, the intake air flow is slow, so fuel vaporization is poor. A rich mixture is therefore necessary in order to achieve good startability. While the engine is being cranked, the battery voltage is applied to terminal STA of the Engine Control Module (ECM). The starter signal is mainly used to increase the fuel injection volume for the starting injection control and after-start injection control.




HINT: In this circuit, diagnosis can only be made in the check mode.

WIRING DIAGRAM





INSPECTION PROCEDURE
HINT: This diagnostic chart is based on the premise that the engine cranks normally.