1991 LEXUS SC400 Service Repair Manual

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LEXUS SC400 1991  Service Repair Manual 
SERVICE SPECIFICATIONS
SERVICE DATA
Idle speed                         Magnetic clutch no engaged
                                         Magnetic clutch engaged
Magnetic clutch clearanceApprox. 700

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LEXUS SC400 1991  Service Repair Manual 
 
Diag. Code 14\
 \
Open in Squib Circuit
DIAGNOSTIC CHARTDIAGNOSTIC CHART
The squib circuit consists of the center airbag se

Page 179 of 4087

LEXUS SC400 1991  Service Repair Manual 
Preperation.
Check squib circuit.
Check spiral cable.Check harness between center airbag
sensor assembly and spiral cable.
Check center airbag sensor assembly.
Check squib.
From the results of the ab

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LEXUS SC400 1991  Service Repair Manual 
INSPECTION PROCEDURE
(1) Disconnect battery negative (±) terminal cable, and wait at least 20 seconds.
(2) Remove steering wheel pad (See page  AB±14).
Measure resistance between D+ and D± on spir

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LEXUS SC400 1991  Service Repair Manual 
Check spiral cable.
Repair or replace spiral cable.
Measure resistance between D+ and D± on center
airbag sensor assembly side of connector between
center airbag sensor assembly and spiral cable.
Ch

Page 182 of 4087

LEXUS SC400 1991  Service Repair Manual 
Check center airbag sensor assembly.
Diagnostic code 14 is not output.(1) Connect connector to center airbag sensor 
connector.
(2) Connect connector between center airbag  sensor assembly and spiral

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LEXUS SC400 1991  Service Repair Manual 
MEMO
±
SRS AIRBAG TroubleshootingAB±67 
WhereEverybodyKnowsYourName

Page 184 of 4087

LEXUS SC400 1991  Service Repair Manual 
 
Diag. Code 15\
 \
Open in Front Airbag Sensor Circuit
CIRCUIT DESCRIPTION
The front airbag sensor detects the deceleration