1991 LEXUS SC400 warning lights

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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 200 of 4087

LEXUS SC400 1991  Service Repair Manual 
YES
Does airbag warning light turn off?
NO
1
Replace center airbag sensor assembly. Check airbag warning light circuit
or terminal AB circuit of TDCL or
check connector.
WIRING DIAGRAM
Airbag Warning

Page 243 of 4087

LEXUS SC400 1991  Service Repair Manual 
Customer Problem Analysis Check Sheet
SRS AIRBAG System Check Sheet
Registration No.
Customer s NameRegistration Year/              /
Frame No.
Date Vehicle
Brought In/              /Odometer Readin

Page 244 of 4087

LEXUS SC400 1991  Service Repair Manual 
Diagnosis Inspection
AIRBAG WARNING LIGHT CHECK
(a)  Turn the ignition switch to ACC or ON and check that theairbag warning light lights up.
(b)  Check that the airbag warning light goes out after ap

Page 248 of 4087

LEXUS SC400 1991  Service Repair Manual 
Diagnostic Code Matrix Chart
If a malfunction code is displayed during the diagnostic code check, check\
 the circuit listed for that code in the
table below (Proceed to the page given for that circu

Page 278 of 4087

LEXUS SC400 1991  Service Repair Manual 
DIAGNOSIS SYSTEM
AT09R±07
The electronically controlled transmission system has built±
in self±diagnostic functions. If the malfunction occurs in the
system, the ECM stores the malfunction code in

Page 537 of 4087

LEXUS SC400 1991  Service Repair Manual 
2.  INSPECT BRAKE WARNING LIGHT(a)  Disconnect the connector from the brake fluid warningswitch.
(b)  Release the parking brake pedal.
(c)  Connect  terminals on the wire harness side of the level wa

Page 538 of 4087

LEXUS SC400 1991  Service Repair Manual 
( Coolant Level Warning Switch)
REMOVAL AND INSTALLATION OF COOLANT
LEVEL WARNING SWITCH
1.  REMOVE COOLANT LEVEL WARNING SWITCH(a)  Disconnect the connector.
(b)  Remove the boot.
(c)  Using the not
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