Reading and Clearing Diagnostic Trouble Codes

Fig. 4 Climate Control Panel (CCP) display:

Diagnostic Flow Diagram - Part 1 Of 3.:

Diagnostic Flow Diagram - Part 2 Of 3.:

Diagnostic Flow Diagram - Part 3 Of 3.:

To enter diagnostic mode, turn ignition On, then depress Off and Warmer buttons on the Climate Control Panel (CCP), Fig. 4. Hold buttons until all display panel segments illuminate, indicating beginning of diagnostic readout. The two display panels must be illuminated to ensure all segments are operating. Do not attempt diagnosis unless all segments appear, as a misdiagnosis could result. If any segments are inoperative, the display panel must be replaced.