1991 LEXUS SC400 Service Repair Manual

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LEXUS SC400 1991  Service Repair Manual 
MEMOAB±35
SRS AIRBAG
   ±   Troubleshooting 
WhereEverybodyKnowsYourName

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LEXUS SC400 1991  Service Repair Manual 
Location of Connectors
LOCATION OF CONNECTORS IN INSTRUMENT PANEL
AB±36SRS AIRBAG   ±   Troubleshooting 
WhereEverybodyKnowsYourName

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LEXUS SC400 1991  Service Repair Manual 
AB±37SRS AIRBAG   ±   Troubleshooting 
WhereEverybodyKnowsYourName

Page 252 of 4087

LEXUS SC400 1991  Service Repair Manual 
LOCATION OF CONNECTORS IN ENGINE COMPARTMENT
AB±38SRS AIRBAG   ±   Troubleshooting 
WhereEverybodyKnowsYourName

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LEXUS SC400 1991  Service Repair Manual 
MEMOAB±39
SRS AIRBAG
   ±   Troubleshooting 
WhereEverybodyKnowsYourName

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LEXUS SC400 1991  Service Repair Manual 
Circuit Inspection
Diag. Code (Normal)Source Voltage Drop
CIRCUIT DESCRIPTION
The airbag system is equipped with a voltage±increase circuit (DC±DC\
 converter) in the center airbag
sensor assembly

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LEXUS SC400 1991  Service Repair Manual 
(1) Turn ignition switch LOCK.
(2) Disconnect  center airbag sensor assemblyconnector.
(3) Turn ignition switch ON. But do not start engine.
(4) Measure voltage at IG
2 or ACC on connector
wire harne

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LEXUS SC400 1991  Service Repair Manual 
Diag. Code 11Short is Squib Circuit or Front Airbag
Sensor Circuit (to Ground)
CIRCUIT DESCRIPTION
The squib circuit consists of the center airbag sensor assembly, spiral cable and the steering wheel