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Home >> Mazda >> 2025 >> CX-5 S Select >> Repair and Diagnosis >> Transmission >> Automatic Trans >> On-Board Diagnostic - AWD System >> DTC U0402:68 Error Signal Received From Transaxle [AWD Control Module] >> Diagnostic Procedure
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Diagnostic Procedure

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 
  • Are any other DTCs displayed?
Yes Repair the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [AWD CONTROL MODULE] .)
No DTC troubleshooting completed.