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

1. Disconnect the EVP control unit connector. (See EVP CONTROL UNIT REMOVAL/INSTALLATION.)
2. Measure the voltage or continuity of the EVP control unit wiring harness-side connctor using a tester.

Terminal Voltage Table (Reference)

Terminal

Connected to

Measured item

Test condition or measured terminal

Specification (Reference)

Inspection item

A

Battery

Voltage

Under any condition

B+

B

—

—

—

—

—

C

Electric vacuum pump

Continuity

EVP control unit terminal C—electric vacuum pump terminal B

Continuity detected

D

—

—

—

—

—

E

Electric vacuum pump

Continuity

EVP control unit terminal E—electric vacuum pump terminal A

Continuity detected

F

—

—

—

—

—

G

Ground point

Continuity

EVP control unit terminal G—ground point

Continuity detected

  • Inspect related wiring harness.

H

—

—

—

—

—

I

—

—

—

—

—

J

—

—

—

—

—

K

—

—

—

—

—

L

—

—

—

—

—

M

—

—

—

—

—

N

—

—

—

—

—

O

—

—

—

—

—

P

IG1 relay

Voltage

Ignition off

1.0 V or less

  • Inspect the IG1 relay.

    (See RELAY INSPECTION.)

  • Inspect related wiring harness.

Ignition ON (engine off)

B+

Q

—

—

—

—

—

R

—

—

—

—

—

S

—

—

—

—

—

T

—

—

—

—

—

U

—

—

—

—

—

V

—

—

—

—

—

W

—

—

—

—

—

X

—

—

—

—

—

Y

Vacuum sensor 1

Continuity

EVP control unit terminal Y—vacuum sensor 1 terminal B

Continuity detected

Z

CAN related module

Because this terminal is for communication, determination using terminal voltage inspection is not possible. Perform the inspection using the DTC inspection.

AA

Vacuum sensor 1

Continuity

EVP control unit terminal Y—vacuum sensor 1 terminal A

Continuity detected

AB

—

—

—

—

—

AC

Vacuum sensor 1

Continuity

EVP control unit terminal Y—vacuum sensor 1 terminal C

Continuity detected

AD

CAN related module

Because this terminal is for communication, determination using terminal voltage inspection is not possible. Perform the inspection using the DTC inspection.
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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5

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