Grand Caravan V6-3.8L VIN L (2007)
The Input Speed Sensor (1) is sealed with an O-ring (2) (Figure 2), and is considered a primary input to the Powertrain/Transmission Control Module.
Operation
OPERATION
Figure 1 Sensor Relation to Input Clutch Hub
The Input Speed Sensor (1) (Figure 1) provides information on how fast the input shaft is rotating. As the teeth of the input clutch hub (3) pass by the
sensor coil, an AC voltage is generated and sent to the PCM/TCM. The PCM/TCM interprets this information as input shaft rpm.
The PCM/TCM compares the input speed signal with output speed signal to determine the following:
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Transmission gear ratio
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Speed ratio error detection
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CVI calculation
The PCM/TCM also compares the input speed signal and the engine speed signal to determine the following:
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Torque converter clutch slippage
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Torque converter element speed ratio
Description
