Diagnostic Procedure
WARNING: This page is about a different car, the 2025 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.
DTC U0402:68 (AWD CONTROL MODULE) DIAGNOSTIC PROCEDURE
| Step | Inspection | Results | Action |
|---|---|---|---|
| 1 | VERIFY DTCs FOR TCM
|
Yes | Repair the malfunctioning part according to the applicable DTC troubleshooting. (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (FW6A-EL, FW6AX-EL)] .) (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (GW6A-EL, GW6AX-EL)] .) |
| No | Go to the next step. | ||
| 2 | DRIVE VEHICLE THEN VERIFY DTCs FOR TCM AGAIN
|
Yes | Repair the malfunctioning part according to the applicable DTC troubleshooting. (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (FW6A-EL, FW6AX-EL)] .) (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (GW6A-EL, GW6AX-EL)] .) |
| No | Go to the next step. | ||
| 3 | VERIFY DTC TROUBLESHOOTING COMPLETED
|
Yes | Replace the AWD control module, then go to the next step. (See AWD CONTROL MODULE REMOVAL/INSTALLATION .) |
| No | Go to the next step. | ||
| 4 | VERIFY IF OTHER DTCs DISPLAYED
|
Yes | Repair the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [AWD CONTROL MODULE] .) |
| No | DTC troubleshooting completed. |