1991 LEXUS SC400 Service Repair Manual

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Page 185 of 4087

LEXUS SC400 1991 Service Repair Manual Preperation. Check front airbag sensor circuit. (Measure resistance between terminals +SR and ±SR, +SL and ±SL of center airbag sen- sor assembly connector.) Check center airbag sensor assembly.Fro

Page 186 of 4087

LEXUS SC400 1991 Service Repair Manual INSPECTION PROCEDURE When storing steering wheel pad, keep upper surface of pad facing upward. Preparation. (1) Disconnect battery negative (±) terminal cable, and wait at least 20 seconds. (2) Remo

Page 187 of 4087

LEXUS SC400 1991 Service Repair Manual 3 Codes other than code 15 may be output at this time, but this is not relevant to this check.Replace front airbag sensor. NG OK (1) Turn ignition switch ACC or ON, and wait at least 20 seconds. (2)

Page 188 of 4087

LEXUS SC400 1991 Service Repair Manual 5Check harness between center airbag sensor assembly and front airbag sensor. (1) Disconnect center airbag sensor assembly connector. (2) Using service wires, connect +SR and ±SR, +SL and ±SL on th

Page 189 of 4087

LEXUS SC400 1991 Service Repair Manual MEMO ± SRS AIRBAG TroubleshootingAB±73 WhereEverybodyKnowsYourName

Page 190 of 4087

LEXUS SC400 1991 Service Repair Manual Diag. Code 22Airbag Warning Light System Malfunction CIRCUIT DESCRIPTION The airbag warning light is located on the combination meter. When the airbag system is normal, the airbag warning light

Page 191 of 4087

LEXUS SC400 1991 Service Repair Manual OKNG 1 2 3 4 5 6 6 OK OK YES YES NG NG NO NO Check connection of center airbag sensor assembly connector. Preparation. Check airbag warning light circuit. Does airbag warning light come on? Is new EC

Page 192 of 4087

LEXUS SC400 1991 Service Repair Manual YESNO 1 Replace center airbag sensor assembly. Using simulation method, reproduce malfunction symptoms (See page IN±20). WIRING DIAGRAM Is diagnostic code 22 output again? DIAGNOSTIC CHART HI
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