Instrument Cluster (IC) Dealer Test Mode: Notes
To enter the Instrument Cluster (IC) dealer test mode, press and hold the select/reset button (base cluster) or the message center RESET button (message center cluster). Turn the ignition switch to the RUN position and continue to hold the select/reset or RESET button until the display indicates tESt, usually within 3 to 5 seconds. Press the select/reset or RESET button once to advance through each stage of the self-test.
To exit the IC dealer test mode, turn the ignition switch to the OFF position.