Turn the ignition switch ON (II) and check the same terminals for voltage. HEATER CONTROL PANEL CONNECTOR A (14P) Wire side of female terminals HEATER CONTROL PANEL CONNECTOR B (22P) Wire side of female terminals Is there any voltage? YES - Repair any short to power in the wire(s) between the heater control panel and the air mix control motor. This short also damages the heater control panel. Repair the short to power before replacing the heater control panel. NO - Substitute a known-good heater control panel and recheck. If the symptom/indication goes away, replace the original heater control panel.

4-door DTC 9: A Problem in the Air Mix Control Linkage, Door or Motor Test the air mix control motor (see page 21-44). Is the air mix control motor OK? YES - Substitute a known-good heater control panel and recheck. If the symptom/indication goes away, replace the original heater control panel. NO - Go to step 2. Remove the air mix control motor (see page 21-44). Check the air mix control linkage and door for smooth movement. Do the air mix control linkage and door move smoothly? YES - Replace the air mix control motor. NO - Repair the air mix control linkage or door.