{"model":"mk4","model_name":"MK4 Supra","vehicle":"Toyota Supra A80 (1993–2002, 2JZ-GE / 2JZ-GTE)","document":"Repair Manual","section":"TGTE","section_name":"Troubleshooting 2JZ-GTE","page":73,"pages_in_section":113,"title":"Dtc 43 Starter Signal Circuit","section_header":"Engine — 2JZ-GTE Engine Troubleshooting","ocr_text":"EG–559\nENGINE – 2JZ–GTE ENGINE TROUBLESHOOTING\n\nDTC 43 Starter Signal Circuit\n\nCIRCUIT DESCRIPTION\n\nWhen 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.\n\nDTC No. | Diagnostic Trouble Code Detecting Condition | Trouble Area\n43 | No starter signal to ECM | • Open or short in starter signal circuit\n• Open or short in ignition switch or starter relay circuit\n• ECM\n\nWIRING DIAGRAM\n\nEngine Control Module\n\n7 8 B-W 6 ST 4\n1J 1K\nIgnition Switch\nJ/B No. 1\n\n4 (1J)\nJ/B No.1\n4 (1B)\n\nB B 13 B-W\n>>IJ2\nB (for M/T)\n1\nClutch\nStart\nSwitch\nB-W\n2\n\n(for A/T)\n6\nPark/\nNeutral\nPosition\n5 Switch\n\nB\n\n2 IJ1\nB B\n\nW B\n\n2 2 2\nAM1\n2\n5 1\nStarter Relay\n3 2\nR/B No. 2\n\n3\n>>EA1 B B B 77\nE9 STA\n1\n>>EA3 B\n\n(S3) 1\nStarter\n\n77 E1\n\nALT\nMAIN\n\n1 (2A)\n2\n\nB\nL-O 6 L-O 10 L-O 25 4 W-B\n>>IB2 >>IF2 T13 T7\n\nBattery\n\nTheft Deterrent\nand Door Lock\nControl 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transcript of a scanned Toyota factory manual page; verify critical values (torque specs, part numbers) against the image."}