Diagnostic Procedure
VF SEGMENT(S)/LED(S) INOPERATIVE OR WILL NOT DIM - ATC SYMPTOM CHART
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 | Is the symptom outside air temp display inaccurate or inoperative? Yes --> Refer to symptom *OUTSIDE AIR TEMPERATURE DISPLAY INACCURATE OR INOPERATIVE in the Heating & A/C category. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 2 |
All |
| 2 | Turn the ignition on. With the DRBIII®, read the active ATC DTCs. Does the DRBIII® display any DTCs? Yes --> Return to the Heating & A/C symptom list and choose the symptom(s). Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 3 |
All |
| 3 | Turn the ignition on. Press the ATC's PWR switch on.
NOTE:
Compare with a known good ATC Head. Operate all ATC switches while looking at the ATC display panel. Are all of the LEDs & VF Segments operating properly? Yes --> Test Complete. No --> Replace the Automatic Temperature Control (ATC) in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1 . |
All |