TCM Input Devices
- ABS Signal
When ABS system is operating, transfer clutch torque is controlled to eliminate influence of engine braking and reduce degree of coupling between front and rear wheels. This optimizes ABS control.
- ATF Temperature Sensor
ATF sensor detects ATF temperature. This signal is used for inhibiting of torque converter lock-up and release of overdrive. Sensor is mounted to valve body.
- Cruise Switch
The cruise switch, which is part of cruise control system, detects operation of cruise control and expands 4th gear operating range.
- Engine Speed Sensor (Tach Signal)
Engine speed sensor detects engine speed. This signal is used for torque converter lock-up operation. This provides for smooth and controlled operation and prevents engine overrunning in 1st and 2nd range.
- FWD Switch
FWD switch is used to change from AWD to FWD. Inserting of fuse into holder is necessary for testing purposes.
- Inhibitor Switch
Inhibitor switch is used to determine shifting and line pressure for all shift ranges. Inhibitor switch also incorporates a neutral safety switch and back-up light switch. Switch is mounted to shift selector lever shaft. See Figure.
- Throttle Sensor
Throttle sensor detects throttle opening and speed of throttle being depressed. Sensor also determines shift point, line pressure and torque converter lock-up speed according to engine load.
- Vehicle Speed Sensor No. 1
Vehicle speed sensor No. 1 detects vehicle speed. This signal is used to control shifting, torque converter lock-up, line pressure and transfer clutch. Sensor is mounted to transmission. See Figure.
- Vehicle Speed Sensor No. 2
In FWD mode, vehicle speed sensor No. 2 is used as a backup in case of failure of vehicle speed sensor No. 1. In AWD mode, sensor is used to control transfer clutch and as backup for sensor No. 1. Vehicle speed sensor No. 2 is built into combination meter.