1991 LEXUS SC400 Service Repair Manual

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Page 929 of 4087

LEXUS SC400 1991 Service Repair Manual ±MEMO± ± BRAKE SYSTEM TRACTION CONTROL SYSTEM (TRAC)BR±183 WhereEverybodyKnowsYourName

Page 930 of 4087

LEXUS SC400 1991 Service Repair Manual Location of Connectors in Body SC300 BR±184± BRAKE SYSTEM TRACTION CONTROL SYSTEM (TRAC) WhereEverybodyKnowsYourName

Page 931 of 4087

LEXUS SC400 1991 Service Repair Manual ± BRAKE SYSTEM TRACTION CONTROL SYSTEM (TRAC)BR±185 WhereEverybodyKnowsYourName

Page 932 of 4087

LEXUS SC400 1991 Service Repair Manual WIRING DIAGRAM IN±33). DTC24TRAC Sub±Throttle Actuator Circuit CIRCUIT DESCRIPTION The sub±throttle actuator operates in accordance with signals from the E\ CU, controlling the opening and closing

Page 933 of 4087

LEXUS SC400 1991 Service Repair Manual OKNG OKNG INSPECTION PROCEDURES 1Check TRAC fuse. C OK PRemove TRAC fuse from R/B No. 2. Check continuity of TRAC fuse. Continuity Check for short in all harness and components con- nected to TRAC fu

Page 934 of 4087

LEXUS SC400 1991 Service Repair Manual OKNG OKNG 3Check sub±throttle actuator. C OK PDisconnect sub±throttle actuator connector. Check continuity between each terminal of sub±throttle actuator connector shown below. Replace sub±throt

Page 935 of 4087

LEXUS SC400 1991 Service Repair Manual WIRING DIAGRAM DTC25, 26, 27TRAC Sub±Throttle Valve CIRCUIT DESCRIPTION DTC No.DTC Detecting ConditionTrouble Area 25 The difference between the sub±throttle sensor signal voltage and the voltage r

Page 936 of 4087

LEXUS SC400 1991 Service Repair Manual The speed sensor detects the wheel speed and sends the ap- propriate signals to the ECU. These signals are used for control of both the ABS and TRAC control systems. The front and rear rotors each h
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