Entering Self-Diagnostic Mode

To enter diagnostic service mode, turn ignition on, then depress Off and Warm buttons on the climate control panel (CCP). Hold buttons until all display panel segments illuminate, indicating the beginning of diagnostic readout. The two display panels must be illuminated, except for turn signal lights, to ensure all segments are operating. Do not attempt diagnosis unless all segments appear, as an improper diagnosis may result. If any segments are inoperative, the display panel must be replaced.