Chrysler 300M Service Manual page 1306

LH
SPEED SENSOR - OUTPUT (Continued)
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. 389), an AC voltage is generated and sent to
the PCM. The PCM interprets this information as
output shaft rpm.
Fig. 389 Sensor Relation to Planet Carrier Park Pawl
1 - OUTPUT SPEED SENSOR
2 - REAR PLANET CARRIER/OUTPUT SHAFT ASSEMBLY
3 - TRANSAXLE CASE
The PCM compares the input and output speed
signals to determine the following:
• Transmission gear ratio
• Speed ratio error detection
• CVI calculation
VEHICLE SPEED SIGNAL
The vehicle speed signal is calculated from the
Output Speed Sensor. The PCM converts the OSS
signal into a roughly 8000 pulse per mile vehicle
speed signal (using pinion factor information pro-
grammed into its memory), and sends it to the PCM.
The PCM, in turn, sends the vehicle speed message
across the PCI bus to the Instrument Cluster to dis-
play vehicle speed to the driver.
REMOVAL
(1) Disconnect the output speed sensor connector
(Fig. 390).
(2) Unscrew and remove the output speed sensor.
(3) Inpsect the speed sensor o-ring and replace if
necessary (Fig. 391).
Lugs
Fig. 390 Speed Sensor/Connector Location
1 - MANUAL SHIFT LEVER
2 - OUTPUT SPEED SENSOR
3 - LONG STUB SHAFT
4 - INPUT SPEED SENSOR
Fig. 391 O-Ring Location
1 - OUTPUT SPEED SENSOR
2 - O-RING
INSTALLATION
(1) Verify o-ring is installed into position (Fig.
391).
(2) Install and tighten output speed sensor to 27
N·m (20 ft. lbs.) torque.
(3) Connect speed sensor connector (Fig. 390).
(4) Connect battery negative cable.
TRANSAXLE 21 - 145