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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5

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DTC U2300:54/U2300:55/U2300:56/U2300:64 [DSC HU/CM]

DTC	U2300:54	Configuration
	U2300:55
	U2300:56
	U2300:64
DETECTION CONDITION		Configuration error is detected.
FAIL-SAFE FUNCTION		Refer to “Fail-safe function table”. (See DTC TABLE [DSC HU/CM].)
POSSIBLE CAUSE		Configuration procedure is not done properly Correct data cannot be received from instrument cluster Another vehicles control modules (instrument cluster, PCM, DSC HU/CM) been installed
SYSTEM WIRING DIAGRAM		—

Diagnostic Procedure

Step	Inspection		Action
1	RECORD CONFIGURATION DATA Switch the ignition OFF. Switch the ignition ON (engine off), and maintain this condition for approx. 10 s or more. Switch the ignition OFF, and maintain this condition for approx. 3 s or more. Switch the ignition ON (engine off), and maintain this condition for approx. 3 s or more.		Go to the next step.
2	VERIFY DSC HU/CM DTC Using the M-MDS, clear the DTC from the DSC HU/CM. (See CLEARING DTC [DSC HU/CM].) Using the M-MDS, perform the DSC HU/CM DTC inspection. (See DTC INSPECTION [DSC HU/CM].) Are any DTCs present?	Yes	Repeat the inspection from Step1. If the malfunction recurs, go to the next step.
		No	Go to Step6.
3	VERIFY IF PARTS FROM ANOTHER VEHICLE INSTALLED TO INSTRUMENT CLUSTER, PCM OR DSC HU/CM Verify if an instrument cluster, PCM or DSC HU/CM from another vehicle is installed. Has an instrument cluster, PCM, DSC HU/CM or other vehicle part been installed to vehicle?	Yes	Install the correct instrument cluster, PCM or DSC HU/CM, then go to Step1. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.) (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0].) (See DSC HU/CM REMOVAL/INSTALLATION.)
		No	Go to the next step.
4	VERIFY INSTRUMENT CLUSTER AND PCM DTC Using the M-MDS, perform the instrument cluster and PCM DTC inspection. (See DTC INSPECTION [INSTRUMENT CLUSTER].) (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [INSTRUMENT CLUSTER].) (See DTC TABLE [PCM (SKYACTIV-G 2.0)].) DTC troubleshooting completed, then go to the next step.
		No	Go to the next step.
5	VERIFY DSC HU/CM DTC Using the M-MDS, clear the DTC from the DSC HU/CM. (See CLEARING DTC [DSC HU/CM].) Using the M-MDS, perform the DSC HU/CM DTC inspection. (See DTC INSPECTION [DSC HU/CM].) Are any DTCs present?	Yes	Repeat the inspection from Step1. If the malfunction recurs, replace the DSC HU/CM, then go to the next step. (See DSC HU/CM REMOVAL/INSTALLATION.)
		No	Go to the next step.
6	VERIFY NO DTC IS PRESENT Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [DSC HU/CM].)
		No	DTC troubleshooting completed.

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