Functional Description - Transmission Speed Sensor
DESCRIPTION
The Transmission Control Module (TCM), or Transmission Control Module Assembly (TCMA) is extremely sensitive to Electrostatic Discharge (ESD). Always use a ground strap and follow the ESD guidelines in ELECTROSTATIC DISCHARGE (ESD) SENSITIVE DEVICES. Failure to follow these instructions may result in damage to the TCM/TCMA.
The Input Speed Sensor (ISS) and the Output Speed Sensor (OSS) are integrated components of the Transmission Control Module (TCMA) and not serviced individually.
| 1 - Input Speed Sensor (ISS) |
| 2 - Transmission Control Module (TCM) (Includes Transmission Temperature Sensor) |
| 3 - External Wire Harness Connector |
| 4 - Output Speed Sensor (OSS) |
| 5 - Park Position Sensor |
OPERATION
The ISS and OSS are Hall-effect sensors that measure shaft rotational speed. The ISS is located at the front of the TCMA and reads input shaft speed from the magnetic ring on the P2 carrier.
| A - Input Speed Sensor |
| B - Magnetic Ring |
The OSS is located at the back of the TCMA and reads output shaft speed from the P4 carrier.