1995 TOYOTA SUPRA Service Repair Manual

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Page 969 of 2543

TOYOTA SUPRA 1995 Service Repair Manual DTC 58 TRAC Pump Motor Circuit CIRCUIT DESCRIPTION This motor is used to apply hydraulic pressure for the rear wheel brakes during TRAC control.  DTC No. Di

Page 970 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Check TRAC pump motor. Check for open and short in harness and connector between TRAC pump motor and ECU (See page IN±30). Replace TRAC pump motor. Measure resistance between terminal 1 of TRAC pump

Page 971 of 2543

TOYOTA SUPRA 1995 Service Repair Manual DTC 61 TRAC ECU Communication Circuit Malfunction CIRCUIT DESCRIPTION DTC No.Diagnostic Trouble Code Detecting ConditionTrouble area 61  Open or short in THFA, TRCO circuit  ABS & TRAC ECU  TRAC EC

Page 972 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Check voltage between terminals THFA, TRCO of ABS & TRAC ECU and body ground. Check and replace ABS & TRAC ECU. Disconnect ABS & TRAC ECU connector. Measure voltage between terminals THFA, TRCO of ABS

Page 973 of 2543

TOYOTA SUPRA 1995 Service Repair Manual DTC 62 TRAC Vehicle Speed Malfunction DTC No.Diagnostic Trouble Code Detecting ConditionTrouble area 62 ECUAt vehicle speed of 10 km/h (6 mph) or more, pulses are not input for 5 sec. HINT: When DTC

Page 974 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Stop Light Switch Circuit CIRCUIT DESCRIPTION WIRING DIAGRAM The stop light switch senses whether the brake pedal is depressed or released, and spends a signal to the ECU. ± BRAKE SYSTEMANTI±LOCK BR

Page 975 of 2543

TOYOTA SUPRA 1995 Service Repair Manual INSPECTION PROCEDURE Remove ABS & TRAC ECU with connectors still connected. Measure voltage between terminals STP of ABS (& TRAC) ECU and body ground when brake ped- al is depressed Voltage: 8 Ð 14

Page 976 of 2543

TOYOTA SUPRA 1995 Service Repair Manual ABS Warning Light Circuit CIRCUIT DESCRIPTION If the ECU detects trouble, it lights the ABS warning light while at the same time prohibiting ABS control. At this time, the ECU records a diagnostic tro
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