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

OFF

position.

1. Shifter CAN be shifted
out of park.

2. Turn key to the

ON/RUN

position.

2. Shifter CANNOT be
shifted out of park.

3. Turn key to the

ON/RUN

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

LOCK

ACC

position.

4. Key cannot be
returned to the

LOCK

ACC

position.

5. Return shifter to

PARK

and try to remove

the key.

5. Key can be removed
(after returning to

LOCK

position).

6. With the key removed,
try to shift out of

PARK

6. Shifter cannot be
shifted out of

PARK

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

OFF

position.

1. Shifter CAN be shifted
out of park.

2. Turn key to the

ON/RUN

position.

2. Shifter CANNOT be
shifted out of park.

3. Turn key to the

ON/RUN

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

LOCK

ACC

position.

4. Key cannot be
returned to the

LOCK

ACC

position.

5. Return shifter to

PARK

and try to remove

the key.

5. Key can be removed
(after returning to

LOCK

position).

6. With the key removed,
try to shift out of

PARK

6. Shifter cannot be
shifted out of

PARK

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

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

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

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

41TE AUTOMATIC TRANSAXLE

21 - 445

SHIFT MECHANISM (Continued)

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