Upshift Indicator

The up-shift indicator is a LED display that is located in the instrument cluster. The up-shift indicator turns ON when the instrument cluster receives a class 2 serial data message from the VCM/PCM that requests the instrument cluster to turn the up-shift indicator ON. The up-shift indicator located on the instrument cluster turns ON in order to indicate the optimum shift points for maximum fuel economy. Shift the transmission to the next higher gear range. If the conditions permit, when the lamp turns ON. Control of the up-shift indicator is a function of the PCM/VCM. The following conditions are monitored:
^ The engine speed
^ The load
^ The throttle position

These conditions determine if the PCM/VCM will turn the up-shift indicator ON. If the up-shift indicator is erratic or inoperative, verify the integrity of the circuit. Refer to Manual Transmission or Computers and Control Systems for more information about the up-shift indicator.