Chrysler PT Cruiser. Manual — part 833
(4) Remove the battery tray (Fig. 336).
(5) Disconnect input speed sensor connector.
(6) Unscrew and remove input speed sensor (Fig.
337).
(7) Inspect speed sensor o-ring (Fig. 338) and
replace if necessary.
INSTALLATION
CAUTION: When disconnecting speed sensor con-
nector, be sure that the connector weather seal
does not fall off or remain in old sensor.
(1) Verify o-ring is installed into position.
(2) Install and tighten input speed sensor to 27
N·m (20 ft. lbs.).
(3) Connect speed sensor connector.
(4) Install the battery tray (Fig. 336).
(5) Install the battery and hold down clamp (Fig.
335).
(6) Install air cleaner assembly (Fig. 334).
(7) Connect battery cables.
Fig. 336 Battery Tray Removal/Installation
1 - BATTERY TRAY
Fig. 337 Input (Turbine) Speed Sensor
1 - INPUT SPEED SENSOR
Fig. 338 O-Ring Location
1 - INPUT SPEED SENSOR
2 - O-RING
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40TE AUTOMATIC TRANSAXLE
PT
SPEED SENSOR - INPUT (Continued)
SPEED SENSOR - OUTPUT
DESCRIPTION
The Output Speed Sensor is a two-wire magnetic
pickup device that generates an AC signal as rotation
occurs. It is threaded into the transaxle case (Fig.
339), sealed with an o-ring (Fig. 340), and is consid-
ered a primary input to the Powetrain/Transmission
Control Module.
OPERATION
The Output Speed Sensor provides information on
how fast the output shaft is rotating. As the rear
planetary carrier park pawl lugs pass by the sensor
coil (Fig. 341), an AC voltage is generated and sent to
the PCM/TCM. The PCM/TCM interprets this infor-
mation as output shaft rpm.
The PCM/TCM compares the input and output
speed signals to determine the following:
• Transmission gear ratio
• Speed ratio error detection
• CVI calculation
Fig. 339 Output Speed Sensor
1 - OUTPUT SPEED SENSOR
Fig. 340 O-Ring Location
1 - OUTPUT SPEED SENSOR
2 - O-RING
Fig. 341 Sensor Relation to Planet Carrier Park Pawl
1 - OUTPUT SPEED SENSOR
2 - REAR PLANET CARRIER/OUTPUT SHAFT ASSEMBLY
3 - TRANSAXLE CASE
PT
40TE AUTOMATIC TRANSAXLE
21 - 287
VEHICLE SPEED SIGNAL
The vehicle speed signal is taken from the Output
Speed Sensor. The PCM converts this signal into a
pulse per mile signal and sends the vehicle speed
message across the communication bus to the BCM.
The BCM sends this signal to the Instrument Cluster
to display vehicle speed to the driver. The vehicle
speed signal pulse is roughly 8000 pulses per mile.
REMOVAL
CAUTION: When disconnecting speed sensor con-
nector, be sure that the connector weather seal
does not fall off or remain in old sensor.
(1) Disconnect the battery cables.
(2) Remove air cleaner assembly (Fig. 342).
(3) Remove the battery hold down clamp and
remove the battery (Fig. 343).
(4) Remove the battery tray (Fig. 344).
(5) Disconnect ouput speed sensor connector.
(6) Unscrew and remove output speed sensor (Fig.
345).
(7) Inspect speed sensor o-ring (Fig. 346) and
replace if necessary.
Fig. 342 Air Cleaner Assembly Removal/Installation
1 - AIR CLEANER ASSEMBLY
Fig. 343 Battery Removal/Installation
1 - BATTERY
Fig. 344 Battery Tray Removal/Installation
1 - BATTERY TRAY
21 - 288
40TE AUTOMATIC TRANSAXLE
PT
SPEED SENSOR - OUTPUT (Continued)
INSTALLATION
CAUTION: When disconnecting speed sensor con-
nector, be sure that the connector weather seal
does not fall off or remain in old sensor.
(1) Verify o-ring is installed into position (Fig.
346).
(2) Install and tighten output speed sensor to 27
N·m (20 ft. lbs.).
(3) Connect speed sensor connector.
(4) Install the battery tray (Fig. 344).
(5) Install the battery and hold down clamp (Fig.
343).
(6) Install air cleaner assembly (Fig. 342).
TORQUE CONVERTER
DESCRIPTION
The torque converter (Fig. 347) is a hydraulic
device that couples the engine crankshaft to the
transmission. The torque converter consists of an
outer shell with an internal turbine, a stator, an
overrunning clutch, an impeller and an electronically
applied converter clutch. The converter clutch pro-
vides reduced engine speed and greater fuel economy
when engaged. Clutch engagement also provides
reduced transmission fluid temperatures. The con-
verter clutch engages in third gear. The torque con-
verter hub drives the transmission oil (fluid) pump.
The torque converter is a sealed, welded unit that
is not repairable and is serviced as an assembly.
Fig. 345 Output Speed Sensor
1 - OUTPUT SPEED SENSOR
Fig. 346 O-Ring Location
1 - OUTPUT SPEED SENSOR
2 - O-RING
Fig. 347 Torque Converter Assembly
1 - TURBINE
2 - IMPELLER
3 - HUB
4 - STATOR
5 - CONVERTER CLUTCH DISC
6 - DRIVE PLATE
PT
40TE AUTOMATIC TRANSAXLE
21 - 289
SPEED SENSOR - OUTPUT (Continued)
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