1995 TOYOTA SUPRA Service Repair Manual

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Page 1953 of 2543

TOYOTA SUPRA 1995 Service Repair Manual DTC 42 No.1 Vehicle Speed Sensor Signal Circuit CIRCUIT DESCRIPTION The No.1 vehicle speed sensor outputs a 4±pulse signal for every revolution of the rotor shaft, which is rotated by the transmissi

Page 1954 of 2543

TOYOTA SUPRA 1995 Service Repair Manual EG±446± ENGINE2JZ±GE ENGINE TROUBLESHOOTING

Page 1955 of 2543

TOYOTA SUPRA 1995 Service Repair Manual INSPECTION PROCEDURE (See page EG±404) (See page BE±48)). Check voltage bertween terminal SP1 of engine control module connector and body ground. Check and replace engine control module. (1) Shift t

Page 1956 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 1957 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 1958 of 2543

TOYOTA SUPRA 1995 Service Repair Manual DTC 52 53 55 Knock Sensor Circuit 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 piezoelectric elemen

Page 1959 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 1960 of 2543

TOYOTA SUPRA 1995 Service Repair Manual INSPECTION USING OSCILLOSCOPE With the engine racing (4,000 rpm) measure wave± form between terminals KNK1, KNK2 of engine control module and body ground. HINT: The correct waveform is as shown. Sp
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