Diagnostic Procedure
WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.
DTC U2300:55 [DASH-ELECTRICAL SUPPLY UNIT] DIAGNOSTIC PROCEDURE
| Step | Inspection | Results | Action |
|---|---|---|---|
| 1 | INSPECT BODY CONTROL MODULE (BCM) FOR MALFUNCTION
|
Yes | Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [BODY CONTROL MODULE (BCM) (US)] .) |
| No | Go to the next step. | ||
| 2 | VERIFY REPLACEMENT RECORD OF DASH-ELECTRICAL SUPPLY UNIT
|
Yes | After re-implementing the required servicing when replacing the dash-electrical supply unit in accordance with dash-electrical supply unit removal/installation, perform the repair completion verification. (See DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER (US)] .) (See DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER (US)] .) |
| No | Go to the next step. | ||
| 3 | RESET CONFIGURATION DATA FOR BODY CONTROL MODULE (BCM)
|
Yes | Perform the body control module (BCM) configuration again using the M-MDS and perform the repair completion verification. |
| No | Go to repair completion verification 2. | ||
| Repair completion verification 1 | VERIFY THAT VEHICLE IS REPAIRED
|
Yes | Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW (US) .) If the CAN communication is normal, perform the diagnosis from Step 1.
|
| No | Go to the next step. | ||
| Repair completion verification 2 | VERIFY IF OTHER DTC IS DISPLAYED
|
Yes | Repair the malfunctioning location according to the applicable DTC troubleshooting. |
| No | DTC troubleshooting completed. |