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

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DTC U3000:4B [EVP CONTROL UNIT]

DTC	U3000:4B	EVP control unit: high internal temperature
DETECTION CONDITION		A circuit board temperature inside the EVP control unit of 130 degrees C {266 degrees F} or more is detected.
FAIL-SAFE FUNCTION		Refer to “Fail-safe function table”. (See DTC TABLE [EVP CONTROL UNIT].)
POSSIBLE CAUSE		Continuous use of electric vacuum pump under high engine compartment temperature Temperature sensor (built-in EVP control unit) malfunction EVP control unit malfunction
SYSTEM WIRING DIAGRAM		—

Diagnostic Procedure

Step	Inspection		Action
1	RECORD SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS TO UTILIZE WITH REPEATABILITY VERIFICATION NOTE: Recording can be facilitated using the screen capture function of the PC. Record the snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (fuel system related) on the repair order.	—	Go to the next step.
2	VERIFY IF DIAGNOSTIC RESULT IS AFFECTED BY OTHER RELATED DTCs OCCURRING Using the M-MDS, perform the EVP control unit DTC inspection. (See DTC INSPECTION [EVP CONTROL UNIT].) Is any other DTC or pending code stored?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [EVP CONTROL UNIT].)
2		No	Go to the next step.
3	VERIFY DTC REPEATABILITY NOTE: When clearing the DTC, the snap shot data is also cleared at the same time. Snap shot data is recorded if it is not recorded in Step 1. Using the M-MDS, clear the DTC from the EVP control unit. (See CLEARING DTC [EVP CONTROL UNIT].) Switch the ignition ON (engine off). Using the M-MDS, perform the EVP control unit DTC inspection. (See DTC INSPECTION [EVP CONTROL UNIT].) Are any DTCs present?	Yes	DTC U3000:4B is displayed: Replace the EVP control unit, then go to the next step. (See EVP CONTROL UNIT REMOVAL/INSTALLATION.) DTC other than U3000:4B is displayed: Go to the applicable DTC inspection. (See DTC TABLE [EVP CONTROL UNIT].)
3		No	DTC troubleshooting completed. Explain to the customer that there are no malfunctions with the vehicle based on the contents of the servicing.
4	VERIFY NO DTC IS PRESENT Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [EVP CONTROL UNIT].)
4	VERIFY NO DTC IS PRESENT Are any DTCs present?	No	DTC troubleshooting completed.

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