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 U2100:56 (POWER LIFTGATE CONTROL MODULE) DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	VERIFY INSTRUMENT CLUSTER DTCs Retrieve the instrument cluster DTCs using the MMDS. (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 power liftgate (PLG) control module using the M-MDS. (See CLEARING DTC .) Switch the ignition ON (engine off or on) and wait for 1s or more. Retrieve the power liftgate (PLG) control module DTCs using the M-MDS. (See DTC INSPECTION .) Is the same DTC displayed?	Yes	Replace the instrument cluster, then go to the next step. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
2		No	Go to the next step.
3	VERIFY THAT REPAIRS HAVE BEEN COMPLETED Clear the DTC for the power liftgate (PLG) control module using the M-MDS. (See CLEARING DTC .) Switch the ignition ON (engine off or on) and wait for 1s or more. Retrieve the power liftgate (PLG) control module DTCs using the M-MDS. (See DTC INSPECTION .) Is the same DTC displayed?	Yes	Replace the power liftgate (PLG) control module, then go to the next step. (See POWER LIFTGATE (PLG) 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 .)
4		No	DTC troubleshooting completed.