P1500

DTC P1500 Starter Signal Circuit Malfunction

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.

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





DIAGNOSTIC TROUBLE CODE DETECTING CONDITION AND TROUBLE AREA





WIRING DIAGRAM








INSPECTION PROCEDURE

HINT: This inspection procedure is based on the premise that the engine is cranked normally. If the engine is not cranked, see Diagnosis By Symptom.