Upshift Indicator

The up-shift indicator is in the instrument cluster. The up-shift indicator will turn ON when the instrument cluster receives class 2 serial data information from the VCM/PCM requesting the up-shift indicator to be turned ON. The up-shift indicator in the instrument cluster turns on in order to indicate optimum shift points for maximum fuel economy. When this lamp turns on, shift the transmission to the next higher gear range, if the conditions permit.

Control of the up-shift indicator is a function of the PCM/VCM. Several conditions are monitored, such as the engine speed, load, and the throttle position to turn on the lamp. If the lamp is erratic or inoperative, verify the integrity of the circuit. Then use the scan tool to command the up-shift lamp on and oft. If the scan tool can command the up-shift lamp on and oft, replace the PCM/VCM if no problem is found.