Diagnostic Procedure
WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DTC U0423 DIAGNOSTIC PROCEDURE
| Step | Inspection | Action | |
|---|---|---|---|
| 1 | PERFORM INSTRUMENT CLUSTER DTC INSPECTION
|
Yes | Go to the applicable DTC inspection. See DTC TABLE [INSTRUMENT CLUSTER] . |
| No | Go to the next step | ||
| 2 | PERFORM CLIMATE CONTROL UNIT DTC INSPECTION
|
Yes | Replace the instrument cluster, then go to the next step. See INSTRUMENT CLUSTER REMOVAL/INSTALLATION . |
| No | Go to the next step. | ||
| 3 | VERIFY TROUBLESHOOTING COMPLETED
|
Yes | Replace the climate control unit, then go to the next step. See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] . |
| No | Go to the next step. | ||
| 4 | VERIFY THAT NO OTHER DTCs ARE RECORDED
|
Yes | Go to the applicable DTC inspection. See DTC TABLE [INSTRUMENT CLUSTER] . |
| No | DTC troubleshooting completed. | ||