Speed Sensor - Input Description - Chrysler 2004 Concorde Service Manual

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SPEED SENSOR - INPUT

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-

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

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.

384), an AC voltage is generated and sent to the

PCM. The PCM interprets this information as input

Fig. 384 Sensor Relation to Input Clutch

1 - INPUT SPEED SENSOR

2 - TRANSAXLE CASE

3 - INPUT CLUTCH HUB

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 - 143

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