Lexus SC300 / Lexus SC400. Manual — part 137
(Left Side Motor/Circuit Breaker Operation)
Driver’s Door
(a) Disconnect the connector from the master switch.
(b) Connect
the positive (+) lead from the battery to terminal
9 and the negative (–) lead to terminal 10 on the wire
harness side connector and raise the window to full
closed position.
(c) Continue to apply voltage, check that there is a circuit
breaker operation noise within approximately 4 to 40
seconds.
(d) Reverse the polarity, check that the window begins to
descend within approximately 60 seconds.
If operation is not as specified, replace the motor.
Passenger ’s Door
(a) Disconnect the connector from the power window
switch.
(b) Connect
the positive (+) lead from the battery to terminal
2 and the negative (–) lead to terminal 5 on the wire
harness side connector, and raise the window to full
closed position.
(c) Continue to apply voltage, check that there is a circuit
breaker operation noise within approximately 4 to 40
seconds.
(d) Reverse the polarity, check that the window begins to
descend within approximately 60 seconds.
If operation is not as specified, replace the motor.
–
BODY ELECTRICAL SYSTEM
Power Window Control System
BE–153
(Right Side Door Motor/Motor Operation)
(a) Connect
the positive (+) lead from the battery to terminal
1 and the negative (–) lead to terminal 2, check that the
motor turns clockwise.
(b) Reverse the polarity, check that the motor turns
counterclockwise.
If operation is not as specified, replace the motor.
(Right Side Door Motor/Circuit Breaker Operation)
See Step of Left Side Motor on page
BE–154
–
BODY ELECTRICAL SYSTEM
Power Window Control System
(Circuit)
(a) Disconnect the connector from the motor.
(b) Connect the connector to the master switch and power
window switch.
(c) Inspect
the
connector on the wire harness side as
shown.
Check for
Tester connection
Condition
Specified value
Voltage
1–Ground
Ignition switch ON and
DOWN
Battery positive voltage
g
Ignition switch ON and
master switch position
UP or OFF
No voltage
* Ignition switch ON and
DOWN
Battery positive voltage
* Ignition switch ON and
power window switch
DOWN
Battery ositive voltage
power window switch
iti
UP or OFF
No voltage
position
UP or OFF
No voltage
2–Ground
Ignition switch ON and
UP
Battery positive voltage
Ignition switch ON and
master switch position
DOWN or OFF
No voltage
* Ignition switch ON and
UP
Battery positive voltage
* Ignition switch ON and
power window switch
UP
Battery ositive voltage
power window switch
iti
DOWN or OFF
No voltage
position
DOWN or OFF
No voltage
*: Set the window lock switch to the unlock position.
If the circuit is not as specified, refer to
gram and inspect the circuits connected to other parts.
(Theft Deterrent and Door Lock Control
ECU)
REMOVAL AND INSTALLATION OF
THEFT DETERRENT AND DOOR LOCK
CONTROL ECU
1. REMOVE THEFT DETERRENT AND DOOR LOCK
CONTROL ECU
(a) Remove following parts.
(See page
and 113)
•
Instrument No. 1 Under Cover.
•
Instrument No. 1 lower finish panel.
(b) Disconnect the connector and remove the ECU
2. INSTALL THEFT DETERRENT AND DOOR LOCK
CONTROL ECU
For installation, follow the removal procedure in reverse.
–
BODY ELECTRICAL SYSTEM
Power Window Control System
BE–155
INSPECTION OF THEFT DETERRENT
AND DOOR LOCK CONTROL ECU
INSPECT THEFT DETERRENT AND DOOR LOCK CONTROL
ECU
(Circuit)
(a) Inspect ECU Power Source Circuit.
(See page
)
(b) Inspect Actuator Power Source Circuit.
(See page
)
(c) Inspect Ignition Switch Circuit.
(See page
(d) Inspect Door Open Detection Switch Circuit.
(See page
)
If circuit is as specified, inspect ECU operation.
(Operation)
(a) With the connectors connected, shut all doors.
(b) Check
that there is 10 V ~ 14 V between terminal B8 and
ground when the ignition switch is turned on.
(c) After turning the ignition switch off, check within 60
seconds that there is battery voltage between terminal
B8 and ground.
(d) Turn
the ignition switch on then off, and check that there
is 10 V ~ 14 V between terminal B8 and ground when the
ignition is switched off.
(e) Open the front door within 60 seconds of turning the
ignition off and check that there is no voltage between
terminal B8 and ground.
(f) Close all the doors and turn the ignition switch on.
(g) When a front door is opened, check that there is battery
voltage between terminal B8 and ground.
(h) Check that there is no voltage between terminal B8 and
ground when the ignition switch is turned to off.
If operation is not as specified, replace the ECU.
BE–156
–
BODY ELECTRICAL SYSTEM
Power Window Control System
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