1991 LEXUS SC400 Service Repair Manual

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LEXUS SC400 1991  Service Repair Manual 
POWER MIRROR CONTROL
SYSTEM
Description
The Power Miror Control System carries out mirror left/right and up/down ad\
justments electrically when the Mir-
ror Switch is operated. In addition, operatio

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LEXUS SC400 1991  Service Repair Manual 
Parts Location
BE±184±
BODY ELECTRICAL SYSTEM Power Mirror Control System 
WhereEverybodyKnowsYourName

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LEXUS SC400 1991  Service Repair Manual 
Wiring and Connector Diagrams (Contd)
±
BODY ELECTRICAL SYSTEM Power Mirror Control SystemBE±185 
WhereEverybodyKnowsYourName

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LEXUS SC400 1991  Service Repair Manual 
Parts Inspection
(Mirror Switch)
REMOVAL AND INSTALLATION OF
MIRROR SWITCH
(See Instrument Panel on page BO±33)
INSPECTION OF MIRROR SWITCH
INSPECT SWITCH CONTINUITY
 Rear View adjustment switch
Le

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LEXUS SC400 1991  Service Repair Manual 
2. INSPECT MIRROR POSITION SENSORSHINT: Strip off the vinyl tape of the connector and remove ter-
minals 1, 2, 3, 5 and 9 from the connector housing.
(a)  Connect a series of three 1.5 volt dry cell

Page 574 of 4087

LEXUS SC400 1991  Service Repair Manual 
INSPECTION OF MIRROR ECU
1.  INSPECT MIRROR ECU CIRCUITDisconnect  the connectors from the ECU and inspect the
connector  on  the wire harness side as shown in the chart be-
low.
Check forTester conn

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LEXUS SC400 1991  Service Repair Manual 
2.  INSPECT MIRROR ECU OPERATIONConnect  the connectors and using a voltmeter with high im-
pedance  (10 k /V minimum), measure the voltage at each
terminal and body ground.
Check forTester connecti

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LEXUS SC400 1991  Service Repair Manual 
Troubleshooting
You will find the cause of trouble more easily by properly using the table \
shown below. In this table, the
numbers indicate the order of priority of the causes of trouble. Check eac