Manual pages - MX5 Manual | Mazda MX5 (Mk4) 2015+

Knowledge Base

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

< Previous Next >

DTC U3003:16/U3003:17 [EVP CONTROL UNIT]

DTC	U3003:16	EVP cintrol unit power supply low input
	U3003:17	EVP cintrol unit power supply high input
DETECTION CONDITION		DTC U3003:16 The power supply voltage for the EVP control unit is 8.3 V or less for a continuous 0.1 s. DTC U3003:17 The power supply voltage for the EVP control unit is 17.4 V or more for a continuous 0.1 s.
FAIL-SAFE FUNCTION		Refer to “Fail-safe function table”. (See DTC TABLE [EVP CONTROL UNIT].)
POSSIBLE CAUSE		DTC is stored in PCM Battery malfunction Generator malfunction Fuse (EVPS 30A) malfunction Short to ground or open circuit in wiring harness between battery and EVP control unit terminal A Open circuit in wiring harness between EVP control unit terminal G and body ground Poor connection at each connector EVP control unit malfunction

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY PCM DTC Using the M-MDS, perform the PCM DTC inspection. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [PCM (SKYACTIV-G 2.0)].) DTC troubleshooting completed, then go to the next step.
		No	Go to the next step.
2	INSPECT BATTERY Inspect the battery. (See BATTERY INSPECTION.) Is there any malfunction?	Yes	Charge or replace the battery, then go to Step7. (See BATTERY RECHARGING.) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)
		No	Go to the next step.
3	INSPECT GENERATOR Inspect the generator. (See GENERATOR INSPECTION [SKYACTIV-G 2.0].) Is there any malfunction?	Yes	Replace the generator, then go to Step7. (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)
		No	Go to the next step.
4	INSPECT FUSE CONDITION Is the fuse (EVPS 30A) normal?	Yes	Go to the next step.
		No	If the fuse is blown: Refer to the wiring diagram and verify whether or not there is a common connector between fuse and EVP control unit terminal A. If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has a short to ground. Replace the fuse. If the fuse is damaged: Replace the fuse. Go to Step7.
5	INSPECT EVP CONTROL UNIT POWER CIRCUIT FOR OPEN CIRCUIT Switch the ignition OFF. Disconnect the EVP control unit connector. Switch the ignition ON (engine off). Measure the voltage between EVP control unit terminal A (wiring harness-side)—body ground. Is the voltage 10 V or more?	Yes	Go to the next Step.
		No	Refer to the wiring diagram and verify whether or not there is a common connector between battery and EVP control unit terminal A. If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has an open circuit. Go to Step7.
6	INSPECT EVP CONTROL UNIT GROUND CIRCUIT FOR OPEN CIRCUIT OR POOR GROUND Switch the ignition OFF. Disconnect the EVP control unit connector. Measure the resistance between EVP control unit terminal G (wiring harness-side) and body ground. Is the resistance 0—1 ohm?	Yes	Go to the next step.
		No	If the open circuit could be detected in the wiring harness: Refer to the wiring diagram and verify whether or not there is a common connector between EVP control unit terminal G and body ground. If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has an open circuit. Go to the next step. If the resistance is out of specification: Refer to the wiring diagram and verify whether or not there is a common connector between EVP control unit terminal G and body ground. If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a poor ground. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has a poor ground. Go to the next step.
7	VERIFY DTC TROUBLESHOOTING COMPLETED Using the M-MDS, clear the DTC from the EVP control unit. (See CLEARING DTC [EVP CONTROL UNIT].) Using the M-MDS, perform the EVP control unit DTC inspection. (See DTC INSPECTION [EVP CONTROL UNIT].) Is the same DTC present?	Yes	Repeat the inspection from Step1. If the malfunction recurs, replace the EVP control unit, then go to the next step. (See EVP CONTROL UNIT REMOVAL/INSTALLATION.)
		No	Go to the next step.
8	VERIFY NO DTC IS PRESENT Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [EVP CONTROL UNIT].)
		No	DTC troubleshooting completed.

< Previous Next >

This fan site is not affiliated with Mazda, and is intended for personal, or commercial use only. The content of our web pages is for general information purposes only and is presented “as is”. We give no assurance or warranty regarding the accuracy of the contents. Readers should do their due diligence and seek the advice of an appropriately certified automotive technician before attempting any steps on this site. Original content provided by Mazda North America. The content of the manual is copyright under DMCA to: full.metal.resistor@gmail.com

We accept no responsibility for errors, inaccuracies, or omissions found on these pages. Additionally, we hereby exclude liability for any demands, claims, damages or losses of any kind with regard to any content or information provided on our web-site, including but not limited to incidental or consequential damages, direct or indirect loss, compensatory damages, loss of profits, or otherwise. By using this manual you assume full liablity for any procedures carried out on your vehicle, and are responsible for the vehicle remaining road legal and safe.