ACTION EXPECTED RESPONSE
1. Turn key to the 9OFF9
position.
1. Shifter CAN be shifted
out of park.
2. Turn key to the
9ON/RUN9 position.
2. Shifter CANNOT be
shifted out of park.
3. Turn key to the
9ON/RUN9 position and
depress the brake pedal.
3. Shifter CAN be shifted
out of park.
4. Leave shifter in any
gear and try to return key
to the 9LOCK9 or 9ACC9
position.
4. Key cannot be
returned to the 9LOCK9 or
9ACC9 position.
5. Return shifter to
9PARK9 and try to remove
the key.
5. Key can be removed
(after returning to 9LOCK9
position).
6. With the key removed,
try to shift out of 9PARK9.
6. Shifter cannot be
shifted out of 9PARK9.
NOTE: Any failure to meet these expected
responses requires system adjustment or repair.
BRAKE TRANSMISSION SHIFT INTERLOCK
SYSTEM
VERIFICATION
The following chart describes the normal operation
of the Brake Transmission Shift Interlock (BTSI) sys-
tem. If the “expected response” differs from the vehi-
cle’s response, then system repair and/or adjustment
is necessary.
ACTION EXPECTED RESPONSE
1. Turn key to the 9OFF9
position.
1. Shifter CAN be shifted
out of park.
2. Turn key to the
9ON/RUN9 position.
2. Shifter CANNOT be
shifted out of park.
3. Turn key to the
9ON/RUN9 position and
depress the brake pedal.
3. Shifter CAN be shifted
out of park.
4. Leave shifter in any
gear and try to return key
to the 9LOCK9 or 9ACC9
position.
4. Key cannot be
returned to the 9LOCK9 or
9ACC9 position.
5. Return shifter to
9PARK9 and try to remove
the key.
5. Key can be removed
(after returning to 9LOCK9
position).
6. With the key removed,
try to shift out of 9PARK9.
6. Shifter cannot be
shifted out of 9PARK9.
NOTE: Any failure to meet these expected
responses requires system adjustment or repair.
ADJUSTMENT
(1) Loosen set screw and remove knob from shifter
handle (Fig. 282).
(2) Remove the center console assembly as shown
in (Fig. 283).
Fig. 282 Gearshift Knob Removal/Installation
1 - SHIFTER KNOB
2 - SET SCREW
Fig. 283 Center Console
1 - CONSOLE
2 - SCREW (4)
3 - SCREW (2)
21s - 178 41TE AUTOMATIC TRANSAXLE PL
SHIFT INTERLOCK SYSTEM (Continued)
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