Subaru XT 1988 Service Manual page 15

1-3 GENERAL INFORMATION
If the differential lock switch is in the "ON"
position. but the differential lock indicator light is
not on. rock the vehicle slightly forward or back-
ward to lock the differential.
Operate the differential lock switch before setting
the speedometer tester. Never operate the differ-
ential lock switch while the vehicle is on the free
rollers. (There is a chance that the vehicle may
jump off the rollers.)
-~
IL \
, Differential lock switch
U\
\ I
i
L 1-409
Fig.
7
Differential lock switch
"OFF"
"ON"
L 1-517
Fig.
8
Differential lock indicator light
• For safety, start in second gear. Never make any
abrupt speed changes or maneuvers during the test.
(2) Adapter Method
CD
Equipment
• Speedometer tester ....................... 1
• Wheel blocks ........................... 2
• ADAPTER (499827100) . . . . . . . . . . . . . . . 1
Since the speedometer detector is on the engine side of the
center differential, if the front wheels are locked, the vehicle's
speedometer
will
only indicate 1/2 the speed of the rear
~i11
L1-363
Fig.
9
Adapter
®
Precautions
• Do the testing with the differential lock cancelled.
Confirmation that the differential lock is cancelled
can be done with the differential lock indicator
light, but for this test, confirm with actual driving
that there is no braking phenomenon when turning
sharp corners at low speed.
(®)
=:~
DOOR LOCK
((!!)
::e
DOOfI LOCK
"OFF"
liON"
L1-518
Fig. 10 Differential lock indicator light
• Since the vehicle speedometer indicates
112
the
actual speed of the rotating wheels. be certain to
install an ADAPTER (499827100).
)
L1·412
wheels. Thus, an adapter which doubles the speed is necessary.
Fig. 11 Adapter installation
4