1991 LEXUS SC400 Service Repair Manual

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Page 3185 of 4087

LEXUS SC400 1991 Service Repair Manual OKNG OKNG 3Check front airbag sensor circuit. (Measure voltage between terminals +SR or\ +SL of center airbag sensor assembly connector and body ground.) C OK P1. Connect negative (±) terminal cabl

Page 3186 of 4087

LEXUS SC400 1991 Service Repair Manual OKNG OKNG 5Check P squib circuit. C OK Measure voltage at P+ on spiral cable side of connector between spiral cable and steering wheel pad. Voltage: Below 1 V Go to step  6Check center airbag senso

Page 3187 of 4087

LEXUS SC400 1991 Service Repair Manual OKNG OKNG 7Check D squib. C OK Hint P1. Turn ignition switch LOCK. 2. Disconnect battery negative (±) terminal cable, andwait at least 90 seconds. 3. Connect steering wheel pad (squib) connector. 4

Page 3188 of 4087

LEXUS SC400 1991 Service Repair Manual OKNG From the results of the above inspection, the malfunctioning part can now be\ considered normal. To make sure of this, use the simulation method to check. 9Check spiral cable. C OK P1. Turn ign

Page 3189 of 4087

LEXUS SC400 1991 Service Repair Manual DTC13Short in Squib Circuit (Between D+ Wire Harness and D ± Wire Harness CIRCUIT DESCRIPTION The squib circuit consists of the center airbag sensor assembly, spiral cable and the steering wheel pad

Page 3190 of 4087

LEXUS SC400 1991 Service Repair Manual WIRING DIAGRAM DIAGNOSTIC CHARTDIAGNOSTIC CHART RS±86± SUPPLEMENTAL RESTRAINT SYSTEM TROUBLESHOOTING WhereEverybodyKnowsYourName

Page 3191 of 4087

LEXUS SC400 1991 Service Repair Manual OKNG INSPECTION PROCEDURE 1Preparation. P1. Disconnect battery negative (±) terminal cable, andwait at least 90 seconds. 2. Remove steering wheel pad (See page RS±19) 3. Disconnect connectors of

Page 3192 of 4087

LEXUS SC400 1991 Service Repair Manual OKNG OKNG 3Check center airbag sensor assembly. C OK Hint P1. Using a service wire, connect D+ and D±. 2. Using a service wire, connect P + and P±. 3. Connect negative (±) terminal cable to batter
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