Chrysler PT Cruiser. Manual — part 872
DIAGNOSIS AND TESTING - BRAKE/
TRANSMISSION SHIFT INTERLOCK SYSTEM
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.
Refer to the following chart that expected shifter
response, depending on ignition key/switch (Fig. 315)
and brake pedal positions.
ACTION
EXPECTED RESPONSE
1. Turn key to the
9
OFF
9
position.
1. Shifter CAN be shifted
out of park.
2. Turn key to the
9
ON/RUN
9
position.
2. Shifter CANNOT be
shifted out of park.
3. Turn key to the
9
ON/RUN
9
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
9
LOCK
9
or
9
ACC
9
position.
4. Key cannot be
returned to the
9
LOCK
9
or
9
ACC
9
position.
5. Return shifter to
9
PARK
9
and try to remove
the key.
5. Key can be removed
(after returning to
9
LOCK
9
position).
6. With the key removed,
try to shift out of
9
PARK
9
.
6. Shifter cannot be
shifted out of
9
PARK
9
.
NOTE: Any failure to meet these expected
responses requires system adjustment or repair.
ADJUSTMENTS
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
9
OFF
9
position.
1. Shifter CAN be shifted
out of park.
2. Turn key to the
9
ON/RUN
9
position.
2. Shifter CANNOT be
shifted out of park.
3. Turn key to the
9
ON/RUN
9
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
9
LOCK
9
or
9
ACC
9
position.
4. Key cannot be
returned to the
9
LOCK
9
or
9
ACC
9
position.
5. Return shifter to
9
PARK
9
and try to remove
the key.
5. Key can be removed
(after returning to
9
LOCK
9
position).
6. With the key removed,
try to shift out of
9
PARK
9
.
6. Shifter cannot be
shifted out of
9
PARK
9
.
NOTE: Any failure to meet these expected
responses requires system adjustment or repair.
Fig. 315 Ignition Key/Switch Positions
1 - ACC
2 - LOCK
3 - OFF
4 - ON/RUN
5 - START
21 - 442
41TE AUTOMATIC TRANSAXLE
PT
SHIFT INTERLOCK SYSTEM (Continued)
ADJUSTMENT
(1) Loosen set screw and remove knob from shifter
handle (Fig. 316).
(2) Remove the center console assembly as shown
in (Fig. 317).
(3) Remove shifter bezel (Fig. 318).
(4) Adjust interlock cable/system as follows:
Pry up on cable adjuster lock to release and allow
cable to “self-adjust”. Lock cable adjustment by press-
ing down on the adjuster lock until bottomed at the
cable housing.
(5) Verify correct system operation. Refer to verifi-
cation procedure.
(6) Install shifter bezel (Fig. 318).
(7) Install center console assembly (Fig. 317).
(8) Install gearshift knob and tighten set screw to
2 N·m (17 in. lbs.) torque (Fig. 316).
SHIFT MECHANISM
REMOVAL
(1) Loosen set screw and remove knob from shifter
handle (Fig. 319).
Fig. 316 Gearshift Knob
1 - SHIFTER KNOB
2 - SET SCREW
Fig. 317 Center Console Removal/Installation
1 - CENTER CONSOLE
Fig. 318 Shifter Bezel Removal/Installation
1 - BEZEL
2 - SCREW (4)
Fig. 319 Gearshift Knob Removal/Installation
1 - SHIFTER KNOB
2 - SET SCREW
PT
41TE AUTOMATIC TRANSAXLE
21 - 443
SHIFT INTERLOCK SYSTEM (Continued)
(2) Remove the center console assembly as shown
in (Fig. 320).
(3) Remove shifter bezel (Fig. 321).
(4) Disconnect BTSI cable from mechanism (Fig.
322).
(5) Disconnect shift cable from shifter mechanism
as shown in (Fig. 323).
(6) Remove four (4) shift mechanism-to-floor pan
nuts. Remove shift mechanism.
Fig. 320 Center Console Removal/Installation
1 - CENTER CONSOLE
Fig. 321 Shifter Bezel Removal/Installation
1 - BEZEL
2 - SCREW (4)
Fig. 322 Interlock Cable at Shifter Assembly
1 - INTERLOCK CABLE
2 - SHIFTER ASSEMBLY
Fig. 323 Gearshift Cable at Shifter Assembly
1 - SHIFTER ASSEMBLY
2 - GROMMET PLATE NUT
3 - SHIFT CABLE
21 - 444
41TE AUTOMATIC TRANSAXLE
PT
SHIFT MECHANISM (Continued)
INSTALLATION
(1) Install shift mechanism into position. Install
mechanism-to-floor pan nuts and torque to 12 N·m
(105 in. lbs.).
(2) Install gearshift cable to shift mechanism (Fig.
323).
(3) Adjust gearshift cable. (Refer to 21 - TRANS-
MISSION/TRANSAXLE/AUTOMATIC - 40TE/GEAR
SHIFT CABLE - ADJUSTMENTS)
(4) Connect shift bezel lamp socket. Install shift
bezel and torque screws to 2 N·m (17 in. lbs.) (Fig.
321).
(5) Install and secure BTSI cable to shift mecha-
nism (Fig. 322).
(6) Adjust BTSI cable. (Refer to 21 - TRANSMIS-
SION/TRANSAXLE/AUTOMATIC
-
40TE/SHIFT
INTERLOCK SYSTEM - ADJUSTMENTS)
(7) Install center console assembly (Fig. 320).
(8) Install gear shift knob. Torque set screw to 2
N·m (17 in. lbs.).
SOLENOID/PRESSURE
SWITCH ASSY
DESCRIPTION
The Solenoid/Pressure Switch Assembly (Fig. 324)
is external to the transaxle and mounted to the
transaxle case. The assembly consists of four sole-
noids that control hydraulic pressure to the LR/CC,
2/4, OD, and UD friction elements. The reverse
clutch is controlled by line pressure from the manual
valve in the valve body. The solenoids are contained
within the Solenoid/Pressure Switch Assembly, and
can only be serviced by replacing the assembly.
The solenoid assembly also contains pressure
switches that monitor and send hydraulic circuit
information to the PCM/TCM. Likewise, the pressure
switches can only be service by replacing the assem-
bly.
OPERATION
SOLENOIDS
The solenoids receive electrical power from the
Transmission Control Relay through a single wire.
The PCM/TCM energizes or operates the solenoids
individually by grounding the return wire of the sole-
noid needed. When a solenoid is energized, the sole-
noid valve shifts, and a fluid passage is opened or
closed (vented or applied), depending on its default
operating state. The result is an apply or release of a
frictional element.
The 2/4 and UD solenoids are normally applied,
which by design allow fluid to pass through in their
relaxed or “off” state. This allows transaxle limp-in
(P,R,N,2) in the event of an electrical failure.
The continuity of the solenoids and circuits are
periodically tested. Each solenoid is turned on or off
depending on its current state. An inductive spike
should be detected by the PCM/TCM during this test.
It no spike is detected, the circuit is tested again to
verify the failure. In addition to the periodic testing,
the solenoid circuits are tested if a speed ratio or
pressure switch error occurs.
Fig. 324 Solenoid/Pressure Switch Assembly
1 - SOLENOID AND PRESSURE SWITCH ASSEMBLY
PT
41TE AUTOMATIC TRANSAXLE
21 - 445
SHIFT MECHANISM (Continued)
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