Sensor, Mode: Description
DESCRIPTION
The transfer case encoder (3) provides the Drive Train Control Module (DTCM) feedback about the position of the transfer case. The sensor consists of a linear analog position sensor that converts the motor output shaft position into a DC signal. The sensor may rotate a full 360 degrees. When the DTCM is not in sleep mode, it must supply 5 VDC (+/- 0.5 v) to the sensor and monitor the shift motor position. The sensor position is monitored when the ignition is in the RUN position and for 10 seconds after the ignition is turned to the OFF position. The sensor is mechanically linked to the shaft of the cam. The mode sensor draws less than 20 mA of current during operation.
OPERATION
During normal vehicle operation, the DTCM monitors the mode sensor outputs at least every 2 milliseconds when the shift motor is stationary or active. The mode sensor position will be considered invalid by the DTCM if the voltage is greater than 4.75 V or if it is less than 0.25 V.
All the parameter voltages referred to in the following information are calibrated items in the controller software and are subject to change.
The DTCM shall consider Transfer Case position based on the MODE SENSOR VOLTAGES table listed below:
| TRANSFER CASE POSITION | Voltage |
|---|---|
| 4WD AUTO (ACTIVE) | 2.00 - 4.75 |