Lexus SC300 / Lexus SC400. Service manual — part 735
![](/vehicle/tus/kendre/chaul/toreluray.png)
OK
NG
OK
NG
INSPECTION PROCEDURE
1
Check telescopic motor.
C
P
Disconnect telescopic motor connector.
Connect positive
(negative
) terminal to terminal
1 of telescopic motor connector and negative
(posi-
tive
) terminal to terminal 2.
Replace telescopic motor.
2
Check harness and connector between ECU and telescopic motor (See page IN–33).
Repair or replace harness or connector.
Proceed to next circuit inspection shown on ma-
trix chart (See page SR–52).
–
STEERING
STEERING COLUMN
SR–79
![](/vehicle/tus/kendre/chaul/zyor.png)
).
WIRING DIAGRAM
Auto Set Switch Circuit
CIRCUIT DESCRIPTION
This is the main switch for auto operation.
When the switch is off, auto operation is prohibited.
DIAGNOSTIC CHART
DIAGNOSTIC CHART
SR–80
–
STEERING
STEERING COLUMN
![](/vehicle/tus/kendre/chaul/ltandenoheke.png)
NG
OK
OK
NG
INSPECTION PROCEDURE
1
Check voltage between terminals ASW and E
1
of ECU connector.
C
OK
P
Remove ECU with connectors still connected.
Measure voltage between terminals ASW and E
1
of
ECU connector when auto switch is on and off.
Proceed to next circuit inspection shown on matrix chart
(See page
2
Check auto set switch.
C
OK
P
Disconnect combination switch connector.
Measure resistance between terminals 2 (7) and 6 (8)
of combination switch connector when auto switch is on
and off.
( ): SC300
Replace tilt & telescopic switch.
Go to Step
–
STEERING
STEERING COLUMN
SR–81
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