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TSB 08-020-06

Overhead Console Average Fuel Economy Display

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Date: May 5, 2006

Models: 2006 (DR/DH) Ram Truck

Discussion:
On 2006 vehicles equipped with a Compass Mini Trip Computer (CMTC), the average fuel
economy displayed after a reset has been changed. On previous models when the CMTC
average fuel economy was reset by the customer, the new calculation was based on the
fuel usage at the time the reset was activated. In this situation, if a customer was travelling
up hill or accelerating, the display would show a very low average fuel economy and it
could take considerable time for the display to reflect an accurate average fuel economy
display. Conversely, if a customer was travelling down hill and was off the accelerator, the
display would show very high fuel economy. On 2006 vehicles, the calculation has been
changed to use the last displayed average fuel economy as a starting point for the
calculation after a reset. The average fuel economy will then be adjusted from that point. If
the display read 21.6 MPG at the time the reset was activated, the new display will start a
21.6 MPG and would change from that point depending on the current fuel usage. This
was done to eliminate the extreme variations caused by very high or low fuel usage at the
time of the reset.

Policy:    Information Only

This page was edited on: May 3, 2004