{"model":"mk3","model_name":"MK3 Supra","vehicle":"Toyota Supra A70 (1986.5–1992, 7M-GE / 7M-GTE)","document":"Repair Manual","section":"FI","section_name":"EFI System","page":28,"pages_in_section":126,"title":"Diagnostic Codes (Cont'd)","section_header":"EFI System — Diagnosis System","ocr_text":"FI-28\n\nEFI SYSTEM — Diagnosis System\n\nDIAGNOSTIC CODES (Cont'd)\n\nCode No. | Number of \"CHECK\" engine blinks | System | Diagnosis | Trouble area | See page\n\n*3-4 | ∩∩∩∩ ∩∩∩∩ FI2619 | Turbocharger Pressure | *4 Turbocharger pressure is abnormal. | • Turbocharger • Air flow meter • Intercooler system • ECU | —\n\n*3-5 | ∩∩∩∩∩∩∩∩∩∩ FI2619 | HAC Sensor Signal | Open or short circuit in HAC sensor signal. | • ECU | —\n\n41 | ∩∩∩∩ ∏_ FI1615 | Throttle Position Sensor Signal | Open or short circuit in throttle position sensor signal (VTA). | • Throttle position sensor circuit • Throttle position sensor • ECU | FI-36, 55\n\n42 | _∏∏∏∏∏∏∏∏_ FI1615 | Vehicle Speed Sensor Signal | No \"SPD\" signal to ECU for 8 seconds when engine speed is above 2,000 (7M-GE), 1,500 (7M-GTE) rpm and coolant temp. is below 80°C (176°F) and neutral start switch is off. | • Vehicle speed sensor circuit • Vehicle speed sensor • ECU | —\n\n43 | _∩∩∩∩∩∩∩_ FI1616 | Starter Signal | No \"STA\" signal to ECU until engine speed reaches 800 rpm with vehicle not moving. | • Ignition switch circuit • Ignition switch • ECU | FI-42, 62\n\n52 | _∩∩∩∩∩∩∩_ FI1615 | Knock Sensor Signal | Open or short circuit in knock sensor signal. | • Knock sensor circuit • Knock sensor • ECU | —\n\n53 | _∩∩∩∩∩∩∩_ FI1616 | Knock Control Signal to ECU | Knock control program faulty. | • ECU | —\n\n*4 71 | ∏∏∏∏∏∏∏∏∏∏ ∏_ FI2022 | EGR System Malfunction | • EGR gas temp. below predetermined level during EGR operation. • Open circuit in EGR gas temp. sensor signal (THG). | • EGR system (EGR valve, EGR hose etc.) • EGR gas temp. sensor circuit • EGR gas temp. sensor • VSV for EGR • VSV for EGR circuit • ECU | FI-48, 69\n\n51 | _∩∩∩∩∩∩∩∩_ FI1617 | Switch Condition Signal | No \"IDL\" signal, \"NSW\" signal or \"A/C\" signal to ECU, during diagnosis check. | • A/C switch circuit • A/C switch • A/C amplifier • Throttle position sensor circuit • Throttle position sensor • ECU | —\n\n*1 7M-GTE\n*2 7M-GE (California vehicles)\n*3 7M-GE\n*4 Abnormalities in the air flow meter may also be detected.\n*5 California 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transcript of a scanned Toyota factory manual page; verify critical values (torque specs, part numbers) against the image."}