Instruments - Overhead Average Fuel Economy Display
NUMBER: 08-020-06GROUP: Electrical
DATE: May 5, 2006
SUBJECT:
Overhead Console Average Fuel Economy Display
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
Disclaimer:
This bulletin is supplied as technical information only and is not an authorization for repair.