Low Range Signal: Description

The transmission range switch information and calculated range data are transmitted from the automatic TCM via the CAN bus.

The ECM performs a rationality test between these signals. See Fig 1 . A fault is detected if one the following conditions are satisfied:

1. The transmission range switch information indicates low range and the calculated range information indicates high.
2. The transmission range switch information indicates high range and the calculated range information indicates low.

Fig 1: Low Range Signal DTC Testing

Courtesy of LAND ROVER NORTH AMERICA, INC.