Audio-HVAC subdisplay unit does not display
Audio-HVAC subdisplay unit does not display1. Remove the audio-HVAC display module.
2. Remove the audio-HVAC subdisplay unit.
3. Check the connections at the audio-HVAC subdisplay unit 10P connector and the audio-HVAC display panel connector C (10P).
Are the connectors and terminals connected properly?
YES - Go to step 4.
NO - Repair the connection and recheck.
4. Check for continuity between the audio-HVAC subdisplay unit 10P connector and the audio-HVAC display panel connector C (10P) terminals for each wire according to the table.
Is there continuity?
YES - Go to step 5.
NO - Repair open in the wire between the audio-HVAC display panel and the audio-HVAC subdisplay unit.
5. Check for continuity between audio-HVAC subdisplay unit 10P connector terminal and body ground according to the table.
Is there continuity?
YES - Repair short to body ground in the wire between the audio-HVAC display panel and the audio-HVAC subdisplay unit.
NO - Go to step 6.
6. Substitute a known-good audio-HVAC subdisplay unit and recheck.
Does the subdisplay work properly?
YES - Replace the original audio-HVAC subdisplay unit.
NO - Substitute a known-good audio-HVAC display panel and retest. If the symptom/indication goes away, replace the original audio-HVAC display panel.