EVP Control Unit Inspection

WARNING: This page is about a different car, the 2020 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the EVP control unit connector. (See EVP CONTROL UNIT REMOVAL/INSTALLATION .)

Measure the voltage or continuity of the EVP control unit wiring harness-side connector using a tester.

Courtesy of MAZDA MOTORS CORP.

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+	Inspect the battery. (See BATTERY INSPECTION .) Inspect related wiring harness.
B	-	-	-	-	-
C	Electric vacuum pump	Continuity	EVP control unit terminal C-electric vacuum pump terminal B	Continuity detected	Inspect the electric vacuum pump. (See ELECTRIC VACUUM PUMP INSPECTION .) Inspect related wiring harness.
D	-	-	-	-	-
E	Electric vacuum pump	Continuity	EVP control unit terminal E-electric vacuum pump terminal A	Continuity detected	Inspect the electric vacuum pump. (See ELECTRIC VACUUM PUMP INSPECTION .) Inspect related wiring harness.
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.
P	IG1 relay	Voltage	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	Inspect the vacuum sensor 1. (See VACUUM SENSOR 1 INSPECTION .) Inspect related wiring harness.
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 AA-vacuum sensor 1 terminal A	Continuity detected	Inspect the vacuum sensor 1. (See VACUUM SENSOR 1 INSPECTION .) Inspect related wiring harness.
AB	-	-	-	-	-
AC	Vacuum sensor 1	Continuity	EVP control unit terminal AC-vacuum sensor 1 terminal C	Continuity detected	Inspect the vacuum sensor 1. (See VACUUM SENSOR 1 INSPECTION .) Inspect related wiring harness.
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.