1995 TOYOTA SUPRA Service Repair Manual

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Page 2065 of 2543

TOYOTA SUPRA 1995 Service Repair Manual INSPECTION PROCEDURE (See page EG±510) (1) Shift the shift lever to N position. (2) Jack up one of the rear wheels. (3) Connect SST (check harness ªAº). (See page EG±510) (4) Disconnect power st

Page 2066 of 2543

TOYOTA SUPRA 1995 Service Repair Manual 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 there- fore necessary in order to achie

Page 2067 of 2543

TOYOTA SUPRA 1995 Service Repair Manual INSPECTION PROCEDURE HINT: This diagnostic chart is based on the premise that the engine is being cranked under normal conditions. If the engine does not crank, proceed to the matrix chart of problem

Page 2068 of 2543

TOYOTA SUPRA 1995 Service Repair Manual DTC 52 53 55 Knock Sensor Circuit CIRCUIT DESCRIPTION Knock sensors are fitted one each to the front and rear of the left side of the cylinder block to detect engine knocking. This sensor contains a

Page 2069 of 2543

TOYOTA SUPRA 1995 Service Repair Manual INSPECTION PROCEDURE HINT: If diagnostic trouble code 52 is displayed, check No.1 knock sensor (for front side) circuit. If diagnostic trouble code 55 is displayed, check No.2 knock sensor (for rear s

Page 2070 of 2543

TOYOTA SUPRA 1995 Service Repair Manual With the engine racing (4,000 rpm) measure waveform between terminals KNK1, KNK2 of engine cotrol module and body ground. HINT: The correct waveform is as shown. Spread the time on the horizontal a

Page 2071 of 2543

TOYOTA SUPRA 1995 Service Repair Manual See page EG±503. CIRCUIT DESCRIPTION The EGR system is designed to recirculate the exhaust gas, controlled according to the driving condi- tions back into the intake air±fuel mixture. It helps to sl

Page 2072 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Malfunction: Open in EGR Gas Temp. Sensor Circuit (1) Disconnect the EFI No.1 fuse (30A) for 10 sec. or more, with IG switch OFF. Initiate test mode (Connect terminal TE2 and E1 of data link connector
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