Index Dodge Dodge Ram - service manual 2004 year
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3.4.1 VEHICLE INFORMATION DISPLAY The CMTC provides the following functions: • Compass direction • Outside temperature • Elapsed ignition on time • Distance to empty • Average fuel economy • Trip Odometer The CMTC will not display information for any of the screens for which it did not receive the proper The CMTC receives the following messages from the Instrument Cluster: • Verification of US/Metric status • VF display dimming brightness and exterior • Trip Odometer data The CMTC receives the following message from the PCM: • Vehicle Speed US/M BUTTON The US/M button is used to toggle the display between English and Metric measurement units. STEP BUTTON The STEP Button can be used in one of the following ways: 1. To sequentially select one of 4 displays or blank display in the following order: • Average Fuel Economy • Distance to Empty • Trip Odometer • Time Elapsed • Off (Blank) 2. To set the magnetic variance zone when VARI- ANCE = X (X = 1 - 15) is indicated in the VF RESET BUTTON The RESET Button has two different functions: 1. To clear the trip functions that may be reset 2. To enter and exit the diagnostic mode Pressing the RESET button once will clear the trip function that is currently being displayed and • Average Fuel Economy • Trip Odometer • Elapsed Time A reset will only occur if one of the trip functions that may be reset is currently being displayed. The CMTC module will send a beep request to the Instrument Cluster. Simultaneously pressing the RESET button and the C/T button while turning the ignition from Off COMPASS/TEMPERATURE (C/T) BUTTON Actuating the Compass/Temperature Button (C/T) will cause the CMTC to display the compass The CMTC module internally senses and calcu- lates the compass direction. TRAVELER DISPLAY FUNCTIONS Using the STEP button will change the CMTC between modes of operation and display the appro- COMPASS OPERATION Upon ignition on, if the calibration information stored in the CMTC memory is within the normal However, if the calibration information stored in the CMTC memory is not within the normal range Auto activation of the fast Auto-Cal mode will also occur when the CMTC is subjected to high Fast Auto-Cal can also be performed manually, by pressing and holding the RESET button for 10 SETTING MAGNETIC ZONE VARIANCE Variance is the difference between magnetic North and geographic North. For proper compass 9 GENERAL INFORMATION |