To run a self-diagnostic for the Digital climate control:
Turn engine on. Within 10 second of starting engine, press and hold the ‘OFF’ button on the ACC for 5-10 seconds until all segments on the display light up.
Test 1– Display Test. Look for any missing segments or icons
Press Up arrow to get to Test 2.
Test 2 – Input signals from each sensor, wait a couple seconds and it will display one of the following error codes:
20= all OK
21= ambient
22= in-vehicle
24= intake
25= sunload (test in sunlight to prevent this error)
26= PBR
Press Up arrow to get to Test 3 or Down arrow to get to Test 1
Test 3 – Mode Door Motor This test takes a little longer. 30=all modes ok, 31=vent, 32=B/L, 33=B/L, 34=Foot/Def 1, 35=Foot/Def 2, 36=Def
Press Up arrow to get to Test 4 or Down arrow to get to Test 3
Test 4 – Actuators Test Pattern Toggle modes 41-46 by pressing defrost button on ACC.
Test 5 – Temperature Readings Press defrost button to toggle through sensors (ambient, in-vehicle, intake in that order). If the temp is -22, then that sensor is not working. The temperature can also be adjusted to compensate for differences between temp setting and the temp felt by driver. It can be adjusted 6 degrees up or down. While in Test 5, press the fan switch and then the temp adjustment can be made using the Up/Down arrows.
Hit Auto button or turn car off to exit self-diagnose