1991 LEXUS SC400 Service Repair Manual

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Page 1089 of 4087

LEXUS SC400 1991 Service Repair Manual OKNG OKNG INSPECTION PROCEDURE 1Check speed sensor. C OK P OK C P OK C OK 1. Remove front fender liner. 2. Disconnect speed sensor connector. Measure resistance between terminals 1 and 2 of speed sen

Page 1090 of 4087

LEXUS SC400 1991 Service Repair Manual OKNG 3Check sensor rotor and sensor installation. C OK P C OK C OK P C OK Remove front speed sensor rotor (See page BR±71). Check sensor rotor serrations. No scratches or missing teeth. Check the fr

Page 1091 of 4087

LEXUS SC400 1991 Service Repair Manual IN±33 WIRING DIAGRAM DTC41IG Power Source Circuit CIRCUIT DESCRIPTION This is the power source for the ECU and becomes the power source for the CP\ U and actuators. DTC No.DTC Detecting ConditionTro

Page 1092 of 4087

LEXUS SC400 1991 Service Repair Manual OKNG NGOK INSPECTION PROCEDURE 1Check battery positive voltage. Voltage: 10 ± 14 VOK Check and repair the charging system. 2Check voltage between terminals IG1 and GND or ABS (& TRAC) ECU connec\ to

Page 1093 of 4087

LEXUS SC400 1991 Service Repair Manual OKNG OKNG 3Check continuity between terminal GND of ABS (& TRAC) ECU connector and bod\ y ground. C OK Measure resistance between terminals GND or ABS (& TRAC) ECU connector and body ground. Resistan

Page 1094 of 4087

LEXUS SC400 1991 Service Repair Manual WIRING DIAGRAM DTC51ABS Pump Motor Lock CIRCUIT DESCRIPTION DTC No.DTC Detecting ConditionTrouble Area 51Pump motor is not operating normally duringinitial check. ABS pump motor Fail safe function:

Page 1095 of 4087

LEXUS SC400 1991 Service Repair Manual IN±33 DTC53TRAC±Pump Motor Lock CIRCUIT DESCRIPTION DTC No.DTC Detecting ConditionTrouble Area 53 TRAC pump motor is locked Open for TRAC pump motor ground. TRAC pump motor Harness or connec

Page 1096 of 4087

LEXUS SC400 1991 Service Repair Manual WIRING DIAGRAM ± BRAKE SYSTEM ANTI±LOCK BRAKE SYSTEM (ABS)BR±127 WhereEverybodyKnowsYourName
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