1991 LEXUS SC400 Service Repair Manual

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Page 3409 of 4087

LEXUS SC400 1991 Service Repair Manual ± ENGINE TROUBLESHOOTING Wiring DiagramTR±33 WhereEverybodyKnowsYourName

Page 3410 of 4087

LEXUS SC400 1991 Service Repair Manual STANDARD VALUE OF ECU TERMINALS Symbols (Terminals No.)STD Voltage (V)Condition BATT (A33) ± E1 (B69)10 ~ 14Always IGSW (A1)IGSW (A1) + B (A31)± E1 (B69) 10 ~ 14IG switch ON+ B (A31) + B1 (A32) E1

Page 3411 of 4087

LEXUS SC400 1991 Service Repair Manual STANDARD VALUE OF ECU TERMINALS (Contd) Symbols (Terminals No.)STD Voltage (V)Condition ISC1 (B35), ISC2 (B34)E1 (B69)10 14IG switch ONISC1 (B35), ISC2 (B34) ISC3 (B33), ISC4 (B32)±E1 (B69)10 ~ 14I

Page 3412 of 4087

LEXUS SC400 1991 Service Repair Manual TERMINALS OF ECU Connectors of the engine (& ECT) ECU are water±proof and are the bolt type. For water proof type connectors, in order to measure the volt- age of ECU terminals and the resistance o

Page 3413 of 4087

LEXUS SC400 1991 Service Repair Manual TERMINALS OF ECU *1: Only vehicles with ECT. ± ENGINE TROUBLESHOOTING Terminals of ECUTR±35 WhereEverybodyKnowsYourName

Page 3414 of 4087

LEXUS SC400 1991 Service Repair Manual TERMINALS OF ECU (Contd) *1: Only vehicles with ECT. *2: Only for USA specification vehicles. TR±36 ± ENGINE TROUBLESHOOTING Terminals of ECU WhereEverybodyKnowsYourName

Page 3415 of 4087

LEXUS SC400 1991 Service Repair Manual TR±88 TR±10 0 TR±12 2 TR±13 0 TR±13 6 TR±14 0 TR±11 4 TR±14 2 TR±108 TR±11 8 TR±12 4 TR±13 2 AC±84 ST±24 IG±24 IG±6 EM±30 AT±66 IN±32BE±381IG±7 IG±9 MATRIX CHART OF PROBLEM SYMP

Page 3416 of 4087

LEXUS SC400 1991 Service Repair Manual LOCATION OF CONNECTORS Location of Connectors in Engine Compartment TR±36± ENGINE TROUBLESHOOTING Location of Connectors WhereEverybodyKnowsYourName
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