Id Code Box

WARNING: This page is about a different car, the 2015 Subaru XV Crosstrek and 2015 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: ID Code Box Connector Terminal Identification

Courtesy of SUBARU OF AMERICA, INC.

Terminal No.	Terminal symbol	Contents
(B422) No. 1	+B	+B
(B422) No. 2	LIN	LIN communication
(B422) No. 3	IMO2	Immobilizer communication 2
(B422) No. 4	IMO1	Immobilizer communication 1
(B422) No. 5	GND	GND

NOTE: Disconnect the control module connector before checking the following items.

Terminal No.	Standard	Measuring condition	Item
1(+B) ←→ 5 (GND)	10 - 14 V	Always	Voltage
3 (IMO2) ←→ 5 (GND)	0 V	Ignition OFF	Voltage
4 (IMO1) ←→ 5 (GND)	0 V	Ignition OFF	Voltage
5 (GND) ←→ Chassis ground	Continuity exists	Always	Continuity

NOTE: Connect the control module connector before checking the following items.

Terminal No.	Standard	Measuring condition	Item
3 (IMO2) ←→ 5 (GND)	0 V	Ignition OFF	Voltage
3 (IMO2) ←→ 5 (GND)	Waveform 1	Ignition ON	Voltage
4 (IMO1) ←→ 5 (GND)	0 V	Ignition OFF	Voltage
4 (IMO1) ←→ 5 (GND)	Waveform 1	Ignition ON	Voltage

Waveform 1

Fig 2: Identifying Waveform 1

Courtesy of SUBARU OF AMERICA, INC.

Item	Contents
Measured terminal	4 (IMO1) ←→ 5 (GND)
Equipment setting	5 V/DIV, 100 ms/DIV
Measuring condition	Ignition ON