1991 LEXUS SC400 Service Repair Manual

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Page 2937 of 4087

LEXUS SC400 1991 Service Repair Manual NGOK OKNG OKNG INSPECTION PROCEDURE 1Check voltage between terminals TeS and E1 of ECU connector. C OK P1. Remove ECU with connectors still connected. 2. Remove telescopic sensor with connectors stil

Page 2938 of 4087

LEXUS SC400 1991 Service Repair Manual SR±52 ). IN±33 ). WIRING DIAGRAM Telescopic Motor Circuit CIRCUIT DESCRIPTION The ECU provides both + B and ground for the telescopic motor. Reversing polarity of the applied voltage reverses the

Page 2939 of 4087

LEXUS SC400 1991 Service Repair Manual OKNG OKNG INSPECTION PROCEDURE 1Check telescopic motor. C PDisconnect telescopic motor connector. Connect positive �(negative ) terminal to terminal 1 of telescopic motor connector and negative

Page 2940 of 4087

LEXUS SC400 1991 Service Repair Manual SR±52). IN±33 ). WIRING DIAGRAM Auto Set Switch Circuit CIRCUIT DESCRIPTION This is the main switch for auto operation. When the switch is off, auto operation is prohibited. DIAGNOSTIC CHARTDIAGN

Page 2941 of 4087

LEXUS SC400 1991 Service Repair Manual NGOK OKNG INSPECTION PROCEDURE 1Check voltage between terminals ASW and E1 of ECU connector. C OK PRemove ECU with connectors still connected. Measure voltage between terminals ASW and E 1 of ECU con

Page 2942 of 4087

LEXUS SC400 1991 Service Repair Manual OKNG 3Check harness and connector between ECU and tilt & telescopic switch (See pa\ ge IN±33). Repair or replace harness or connector. Check and replace ECU. SR±82± STEERING STEERING COLUMN Wher

Page 2943 of 4087

LEXUS SC400 1991 Service Repair Manual ±MEMO± ± STEERING STEERING COLUMNSR±83 WhereEverybodyKnowsYourName

Page 2944 of 4087

LEXUS SC400 1991 Service Repair Manual Operation of the switch sends different voltage signals to the ECU. SR±52 ). IN±33 ). WIRING DIAGRAM Manual Switch Circuit CIRCUIT DESCRIPTION DIAGNOSTIC CHARTDIAGNOSTIC CHART SR±84± STEERING S
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