Chrysler Dodge Caravan 2002 Manual page 1840

RS
SPEED SENSOR - INPUT (Continued)
Fig. 321 O-ring Location
1 - INPUT SPEED SENSOR
2 - O-RING
INSTALLATION
(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) Connect battery negative cable.
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.
322) , sealed with an o-ring (Fig. 323), and is consid-
ered a primary input to the Transmission Control
Module (TCM).
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. 324), an AC voltage is generated and sent to
the TCM. The TCM interprets this information as
output shaft rpm.
The TCM compares the input and output speed
signals to determine the following:
• Transmission gear ratio
• Speed ratio error detection
• CVI calculation
41TE AUTOMATIC TRANSAXLE
Fig. 322 Output Speed Sensor
1 - OUTPUT SPEED SENSOR
Fig. 323 O-Ring Location
1 - OUTPUT SPEED SENSOR
2 - O-RING
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