Diagnostic Procedure

WARNING: This page is about a different car, the 2018 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DTC U0423:68 (AUTO LEVELING CONTROL MODULE) DIAGNOSTIC PROCEDURE

Step	Inspection		Action
1	VERIFY INSTRUMENT CLUSTER DTCs Retrieve the instrument cluster DTCs using the M-MDS. (See DTC INSPECTION [INSTRUMENT CLUSTER] .) Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [INSTRUMENT CLUSTER] .)
1		No	Go to the next step.
2	VERIFY IF MALFUNCTIONING LOCATION IS INSTRUMENT CLUSTER DEPENDING ON REPEATABILITY Clear the DTC for the auto leveling control module using the M-MDS. (See CLEARING DTC (AUTO LEVELING CONTROL MODULE) .) Switch the ignition ON (engine off or on) and wait for 5 s or more. Retrieve the auto leveling control module DTCs using the M-MDS. (See DTC INSPECTION (AUTO LEVELING CONTROL MODULE) .) Is the same Pending DTC present?	Yes	Replace the instrument cluster, then go to the next step. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
2		No	Go to Step 4.
3	VERIFY THAT REPAIRS HAVE BEEN COMPLETED Clear the DTC for the auto leveling control module using the M-MDS. (See CLEARING DTC (AUTO LEVELING CONTROL MODULE) .) Switch the ignition ON (engine off or on) and wait for 5 s or more. Retrieve the auto leveling control module DTCs using the M-MDS. (See DTC INSPECTION (AUTO LEVELING CONTROL MODULE) .) Is the same Pending DTC present?	Yes	Replace the auto leveling control module, then go to the next step. (See AUTO LEVELING CONTROL MODULE REMOVAL/INSTALLATION .)
3		No	Go to the next step.
4	VERIFY IF OTHER DTCs DISPLAYED Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE (AUTO LEVELING CONTROL MODULE) .)
4		No	DTC troubleshooting completed.