NV231 - Transfer Case

NV231 Transfer Case







DESCRIPTION
The transfer case position sensor is an electronic device whose output can be interpreted to indicate the transfer case's current operating mode. The sensor consists of a five position, resistive multiplexed circuit which returns a specific resistance value to the Powertrain Control Module (PCM) for each transfer case operating mode.

The sensor is located on the top of the transfer case, just left of the transfer case centerline and rides against the sector plate roostercomb. The PCM supplies 5VDC (±0.5V) to the sensor and monitors the return voltage to determine the sector plate, and therefore the transfer case, position.






OPERATION
During normal vehicle operation, the Powertrain Control Module (PCM) monitors the transfer case position sensor return voltage to determine the operating mode of the transfer case.

Operating Mode Versus Resistance Table / NV231 Transfer Case Position Sensor:

Refer to the Operating Mode Versus Resistance table for the correct resistance for each position. Note that the NEUTRAL position is allowed to float between sensor positions 3 and 4. If a resistance is measured anywhere in either range, the sensor is operating correctly.