EG–448 ENGINE – 2JZ–GE ENGINE TROUBLESHOOTING DTC 43 Starter Signal Circuit CIRCUIT DESCRIPTION When the engine is being 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 positive 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. DTC No. | Diagnostic Trouble Code Detecting Condition | Trouble Area 43 | No starter signal to ECM | • Open or short in starter signal circuit • Open or short in ignition switch or starter relay circuit • ECM WIRING DIAGRAM Engine Control Module 7 B B-W 6 ST 4 1J 1K B B 13 B-W Ignition Switch IJ2 J/B No. 1 ω (for M/T) (for A/T) Clutch 6 4 (1J) Start Park/ Switch Neutral J/B No.1 B-W 2 Position 4 (1B) 5 Switch B B 3 B 2 IJ1 EA1 B ω B B 77 STA W E9 2 EA3 B S3 1 2 2 2 Starter AM1 5 1 Starter Relay 2 3 2 R/B No.2 2 ALT MAIN 1 (2A) 2 B L-O 6 L-O 10 L-O 25 4 IB2 IF2 T13 T7 W-B Battery Theft Deterrent and Door Lock Control ECU p21138 E1