Chrysler 300M 2002 Service Manual page 1394

LH
SOLENOID/PRESSURE SWITCH ASSY (Continued)
(4) Remove Solenoid/Pressure Switch Assembly
and screen from valve body (Fig. 381).
Fig. 381 Solenoid/Pressure Switch Assembly and
1 - SOLENOID/PRESSURE SWITCH ASSEMBLY
2 - VALVE BODY
3 - SCREEN
INSTALLATION
NOTE: If the Solenoid/Pressure Switch assembly is
being replaced, the Quick Learn Procedure must be
performed. (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/POWERTRAIN
MODULE - STANDARD PROCEDURE)
(1) Install Solenoid/Pressure Switch Assembly and
screen to the separator and transfer plates (Fig. 381).
(2) Install and tighten retaining screws (Fig. 380)
to 6 N·m (35 in. lbs.) torque.
(3) Install valve body. (Refer to 21 - TRANSMIS-
SION/TRANSAXLE/AUTOMATIC
BODY - INSTALLATION)
SPEED SENSOR - INPUT
DESCRIPTION
The Input Speed Sensor is a two-wire magnetic
pickup device that generates AC signals as rotation
occurs. It is threaded into the transaxle case (Fig.
382), sealed with an o-ring (Fig. 383), and is consid-
ered a primary input to the Powertrain Control Mod-
ule (PCM).
OPERATION
The Input Speed Sensor provides information on
how fast the input shaft is rotating. As the teeth of
the input clutch hub pass by the sensor coil (Fig.
Screen
CONTROL
- 42LE/VALVE
Fig. 382 Transaxle Identification Label
1 - INPUT SPEED SENSOR
2 - OUTPUT SPEED SENSOR
3 - IDENTIFICATION TAG
Fig. 383 O-Ring Location
1 - INPUT SPEED SENSOR
2 - O-RING
384), an AC voltage is generated and sent to the
PCM. The PCM interprets this information as input
shaft rpm.
The PCM compares the input speed signal with
output speed signal to determine the following:
• Transmission gear ratio
• Speed ratio error detection
• CVI calculation
The PCM also compares the input speed signal and
the engine speed signal to determine the following:
• Torque converter clutch slippage
• Torque converter element speed ratio
TRANSAXLE 21 - 145