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 ECM. The starter signal is mainly used to increase the fuel injection volume for the starting injection control and after-start injection control.





DETECTING CONDITION

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





WIRING DIAGRAM

HINT:
- This diagnostic chart is based on premise that engine is cranked normally.
- If engine is not cranked, proceed to matrix chart of problem symptoms.


INSPECTION PROCEDURE