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ASSEMBLY
(1) Lubricate new O-ring and seal rings with
petroleum jelly and install them on piston, guide and
rod.
(2) Install rod in piston. Install spring and washer
on rod. Compress spring and install snap-ring (Fig.
203).
(3) Install piston and return spring (Fig. 199).
(4) Install rod guide and snap ring (Fig. 198) (Fig.
197).
SERVO - LOW/REVERSE
DESCRIPTION
The rear (low/reverse) servo consists of a single
stage or diameter piston and a spring loaded plug.
The spring is used to cushion the application of the
rear (low/reverse) band.
OPERATION
While in the de-energized state (no pressure
applied), the piston is held up in its bore by the pis-
ton spring. The plug is held down in its bore, in the
piston, by the plug spring. When pressure is applied
to the top of the piston, the plug is forced down in its
bore, taking up any clearance. As the piston moves, it
causes the plug spring to compress, and the piston
moves down over the plug. The piston continues tomove down until it hits the shoulder of the plug and
fully applies the band. The period of time from the
initial application, until the piston is against the
shoulder of the plug, represents a reduced shocking
of the band that cushions the shift.
DISASSEMBLY
(1) Back off low/reverse band adjustment and posi-
tion lever out of the way (Fig. 204).
(2) Remove low/reverse servo snap ring (Fig. 205).
Fig. 203 Front Servo Piston
1 - PISTON RINGS
2 - O-RING
3 - SNAP-RING
4 - SEAL RING
5 - PISTON ROD GUIDE
6 - SNAP-RING
7 - SERVO SPRING
8 - PISTON ROD
9 - SERVO PISTON
Fig. 204 Low/Reverse Lever
1 - LOW-REVERSE LEVER
Fig. 205 Low/Reverse Servo Snap Ring
1 - SNAP-RING PLIERS
21 - 112 AUTOMATIC - 31THRS
SERVO - KICKDOWN (Continued)
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(3) Remove retainer, spring and servo (Fig. 206).
CLEANING
Remove and discard the servo piston seal ring (Fig.
207). Then clean the servo components with solvent
and dry with compressed air. Replace either spring if
collapsed, distorted or broken. Replace the plug and
piston if cracked, bent, or worn. Discard the servo
snap-rings and use new ones at assembly.
ASSEMBLY
(1) Install low/reverse servo assembly (Fig. 208).
(2) Install low/reverse servo snap ring (Fig. 205).
SHIFT INTERLOCK SOLENOID
DESCRIPTION
The Brake/Transmission Shift Interlock system
consists of an electro-magnetic solenoid mounted to
the steering column (Fig. 209). The solenoid's plunger
consists of an integrated hook, which operates the
shift lever pawl (part of shift lever assembly), and a
plunger return spring (Fig. 210). The solenoid also
has an integrated bracket, which facilitates fastening
to the steering column.
Fig. 206 Remove Retainer, Spring and Servo
1 - SERVO PISTON
2 - SPRING AND RETAINER
Fig. 207 Rear Servo Components
1 - SNAP-RING
2 - PISTON SEAL
3 - PISTON PLUG
4 - SPRING RETAINER
5 - SNAP-RING
6 - PISTON SPRING
7 - CUSHION SPRING
8 - PISTON
Fig. 208 Low/Reverse Servo Assembly
1 - SERVO PISTON
2 - SPRING
Fig. 209 Brake/Transmission Shift Interlock (BTSI)
Solenoid Location
1 - BTSI SOLENOID
RSAUTOMATIC - 31TH21 - 113
SERVO - LOW/REVERSE (Continued)
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OPERATION
The Brake/Transmission Shift Interlock (BTSI)
Solenoid prevents the transmission shift lever from
being moved out of PARK (P) unless the brake pedal
is applied. The BTSI solenoid is hardwired to and
controlled by the Intelligent Power Module (IPM).
Battery voltage is applied to one side of the solenoid
with the ignition key is in either the ON/RUN or
START positions (Fig. 211). The ground side of the
solenoid is controlled by a driver within the IPM. It
relies on voltage supplied from the stop lamp switch
to the stop lamp sense circuit within the IPM to tell
when the brake pedal is depressed. When the brake
pedal is depressed, the ground circuit opens, de-ener-
gizing the solenoid. When the brake pedal is
released, the ground circuit is closed, energizing the
solenoid.
When the ignition key is in either the ON/RUN or
START positions, the BTSI solenoid is energized, and
the solenoid plunger hook pulls the shift lever pawl
into position, prohibiting the shift lever from moving
out of PARK (P) (Fig. 212). When the brake pedal is
depressed, the ground circuit opens, de-energizing
the solenoid. This moves the gearshift lever pawl out
of the way (Fig. 213), allowing the shift lever to be
moved into any gear position.
Fig. 210 Solenoid Plunger and Return Spring
1 - PLUNGER
2 - RETURN SPRING
3 - BTSI SOLENOID
Fig. 211 Ignition Key/Switch Positions
1 - ACC
2 - LOCK
3 - OFF
4 - ON/RUN
5-START
Fig. 212 Pawl Engaged to Shift Lever
1 - GEAR SHIFT LEVER
2 - GEAR SHIFT LEVER PAWL
21 - 114 AUTOMATIC - 31THRS
SHIFT INTERLOCK SOLENOID (Continued)
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A conventional mechanical interlock system is also
used. This system manually prohibits shifter move-
ment when the ignition switch is in the LOCK or
ACC positions. Solenoid operation is not required in
these key positions. When the ignition key is in the
OFF position, the gearshift lever is unrestricted, and
able to move into any gear position (during towing,
dead battery, etc.).
For intended BTSI system operation, refer to the
following chart:
ACTION EXPECTED RESPONSE
1. Turn key to the9OFF9
position.1. Shifter CAN be shifted
out of park.
2. Turn key to the
9ON/RUN9position.2. Shifter CANNOT be
shifted out of park.
3. Turn key to the
9ON/RUN9position 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 the9LOCK9or9ACC9
position.4. Key cannot be
returned to the9LOCK9or
9ACC9position.
5. Return shifter to
9PARK9and try to remove
the key.5. Key can be removed
(after returning to9LOCK9
position).
6. With the key removed,
try to shift out of9PARK9.6. Shifter cannot be
shifted out of9PARK9.
NOTE: Any failure to meet these expected
responses requires system adjustment or repair.
DIAGNOSIS AND TESTING - BRAKE/
TRANSMISSION SHIFT INTERLOCK SOLENOID
For intended BTSI system operation, refer to the
following chart:
ACTION EXPECTED RESPONSE
1. Turn key to the9OFF9
position.1. Shifter CAN be shifted
out of park.
2. Turn key to the
9ON/RUN9position.2. Shifter CANNOT be
shifted out of park.
3. Turn key to the
9ON/RUN9position 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 the9LOCK9or9ACC9
position.4. Key cannot be
returned to the9LOCK9or
9ACC9position.
5. Return shifter to
9PARK9and try to remove
the key.5. Key can be removed
(after returning to9LOCK9
position).
6. With the key removed,
try to shift out of9PARK9.6. Shifter cannot be
shifted out of9PARK9.
NOTE: Any failure to meet these expected
responses requires system repair. Refer to the
appropriate Diagnostic Information.
REMOVAL
(1) Disconnect battery negative cable.
(2) Remove instrument panel lower shroud (Fig.
214).
Fig. 213 Pawl Disengaged From Shift Lever
1 - GEAR SHIFT LEVER
2 - GEAR SHIFT LEVER PAWL
Fig. 214 Instrument Panel Lower Silencer
1 - INSTRUMENT PANEL LOWER SILENCER
RSAUTOMATIC - 31TH21 - 115
SHIFT INTERLOCK SOLENOID (Continued)
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(3) Remove knee bolster (Fig. 215).
(4) Remove steering column lower shroud.
(5) Disconnect brake/transmission shift interlock
(BTSI) solenoid connector (Fig. 216).
(6) Remove two (2) solenoid-to-column screws (Fig.
217).
(7) Remove solenoid.
INSTALLATION
(1) Place interlock solenoid into position ensuring
hook on end of solenoid plunger engages gearshift
lever pawl pin. Install and tighten screws (Fig. 218).
Fig. 215 Knee Bolster
1 - KNEE BOLSTER
Fig. 216 BTSI Solenoid Connector
1 - BTSI SOLENOID
2 - SOLENOID CONNECTOR
Fig. 217 Solenoid Retaining Screw
1 - SOLENOID RETAINING SCREW (2)
Fig. 218 Solenoid Retaining Screw
1 - SOLENOID RETAINING SCREW (2)
21 - 116 AUTOMATIC - 31THRS
SHIFT INTERLOCK SOLENOID (Continued)
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(2) Verify gearshift lever is in PARK (P) and con-
nect solenoid connector (Fig. 219).
(3) Install steering column lower shroud.
(4) Install knee bolster (Fig. 220).
(5) Install instrument panel lower silencer (Fig.
221).
(6) Connect battery negative cable.
(7) Verify proper shift interlock system operation.
(Refer to 21 - TRANSMISSION/TRANSAXLE/AUTO-MATIC - 31TH/SHIFT INTERLOCK SOLENOID -
OPERATION)
SOLENOID - TCC
DESCRIPTION
The torque converter clutch (TCC) solenoid is fas-
tened to the transaxle valve body, and its connector
protrudes through the transaxle case (Fig. 222).
OPERATION
The torque converter clutch solenoid is responsible
for controlling application of the torque converter
clutch. It is controlled by the Powertrain Control
Module (PCM), which determines when conditions
are acceptable for torque converter lock-up.
Fig. 219 BTSI Solenoid Connector
1 - BTSI SOLENOID
2 - SOLENOID CONNECTOR
Fig. 220 Knee Bolster
1 - KNEE BOLSTER
Fig. 221 Instrument Panel Lower Silencer
1 - INSTRUMENT PANEL LOWER SILENCER
Fig. 222 Torque Converter Clutch Solenoid
1 - TCC SOLENOID WIRING CONNECTOR
RSAUTOMATIC - 31TH21 - 117
SHIFT INTERLOCK SOLENOID (Continued)
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REMOVAL
(1) Remove valve body from transaxle. (Refer to 21
- TRANSMISSION/TRANSAXLE/AUTOMATIC -
31TH/VALVE BODY - REMOVAL)
(2) Remove three (3) torque converter clutch sole-
noid-to-valve body screws (Fig. 223).
(3) Remove torque converter clutch solenoid (Fig.
223). Note orientation of plug and spring.
INSTALLATION
(1) Install plug and spring as shown in (Fig. 223).
(2) Install torque converter clutch solenoid to valve
body (Fig. 223) and torque screws to 5 N´m (45 in.
lbs.).
(3) Install valve body to transaxle. (Refer to 21 -
TRANSMISSION/TRANSAXLE/AUTOMATIC -
31TH/VALVE BODY - INSTALLATION)
THROTTLE VALVE CABLE
REMOVAL
(1) Disconnect battery negative cable.
(2) Disconnect cable core from throttle lever pin
(Fig. 224).
(3) Disconnect cable retainer from throttle body
bracket (Fig. 224).
(4) Disconnect cable from throttle valve lever at
transaxle (Fig. 225).
(5) Disconnect cable retainer at transaxle bracket
(Fig. 225).
INSTALLATION
(1) Install throttle valve cable to bracket at trans-
axle (Fig. 226). Connect cable to transaxle throttle
valve lever.
(2) Route cable through center of intake manifold
(#2 & #3) runners.
Fig. 223 Torque Converter Clutch Solenoid and Regulator/Control Valves
1 - CONVERTER PRESSURE CONTROL VALVE
2 - END COVER
3 - SCREW (3)4 - REGULATOR VALVE THROTTLE PRESSURE PLUG SPRING
5 - REGULATOR VALVE THROTTLE PRESSURE PLUG
6 - SWITCH VALVE
21 - 118 AUTOMATIC - 31THRS
SOLENOID - TCC (Continued)
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Page 1616 of 2321
(3) Connect throttle valve cable retainer to throttle
body bracket (Fig. 227).
(4) Connect cable core clip to throttle lever (Fig.
227).(5) Adjust throttle valve cable. (Refer to 21 -
TRANSMISSION/TRANSAXLE/AUTOMATIC -
31TH/THROTTLE VALVE CABLE - ADJUST-
MENTS)
(6) Connect battery negative cable.
Fig. 224 Throttle Valve Cable at Throttle Body
1 - THROTTLE VALVE CABLE CLIP
2 - THROTTLE BODY LEVER
3 - CABLE RETAINER
Fig. 225 Throttle Valve Cable at Transaxle
1 - LEVER
2 - BRACKET
3 - THROTTLE VALVE CABLE
Fig. 226 Throttle Valve Cable at Transaxle
1 - LEVER
2 - BRACKET
3 - THROTTLE VALVE CABLE
Fig. 227 Throttle Valve Cable at Throttle Body
1 - THROTTLE VALVE CABLE CLIP
2 - THROTTLE BODY LEVER
3 - CABLE RETAINER
RSAUTOMATIC - 31TH21 - 119
THROTTLE VALVE CABLE (Continued)
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