C:

i87

AUDIO OR
NAVIGATION UNIT

2-48

2015 Legacy And Outback CAN

50

June 2014

2015 Legacy and Outback

New Technology Training

(Module 926)

CAN Diagnostics
Terminating Resistors for the Main CAN are located in the ECM and BIU. In previous models, the
terminating resistors were located in the ECM and VDC.
Terminating Resistors for the Body CAN are located in the BIU and Combination Meter. Regardless
if working with the Main or Body CAN, Terminating Resistor values remain the same from previous
model years and should produce 53 – 61Ω when measured across the CAN High and CAN Low
wires.
Please note modules that have the ability to “wake” the CAN Circuit from a “sleep” mode. Failures
within these modules may cause parasitic draw (dark current) as a related symptom.
RDR (Slave)

MAIN CAN
Wake up

Wake up

Private CAN

EPS

TCM

VDC/EPB

STA

SRS

ACN
UART

ODS

Steering Lock

EYE

RDR (Master)

DLC

ECM

ECM-LIN
UART
AGAS

A/C Panel

BMM

SMT-LIN
UART

BIU

BODY CAN
Wake up

Wake up

Wake up

Wake up

IMB

SMT

AVN

RES

Wake up
MET

AHL
BIU-LIN 1

PRG
UART

SRF

PSM

Keyless/TPMS

2-49
CAN Configuration
EPS - Electric Power Steering

IMB - Immobilizer (UK / Canada only)

TCM - Transmission Control Module

PRG -Power Rear Gate

SRS - Supplemental Restraint System Control Unit

VDC/EPB - Vehicle Dynamics Control/ Electronic Parking Brake

RDR - Subaru Rear Vehicle Detection (SRVD)

AVN - Audio/Video/Navigation

DLC - Data Link Connector

AHL - Auto Head lights

ECM - Engine Control Module

RES - Remote Engine Start

AGAS - Active Grille Air Shutter System

SRF - Steering Responsive Fog Lights

BMM - Battery Monitor Module

MET - Combination Meter

STA - Steering Angle Sensor

A/C - Air Conditioning

EYE - Eyesight

ACN - Air Conditioning Control Module

ODS – Occupant Detection System

PSM - Power Seat Memory

BIU - Body Intergrated Unit

SMT - SMART (Keyless Access Control)

51

June 2014

2015 Legacy and Outback

New Technology Training

(Module 926)
The Subaru 2015 Legacy and Outback Service Manual provide updated diagnostics to differentiate
operating faults and communication inabilities.

J/C

J/C

J/C

J/C

J/C

VDC CM

DATA LINK CONNECTOR

SUBARU REAR
VEHICLE DETECTION (LH)

A/C CM

AIRBAG CM

STEREO CAMERA

AHL CM OR SRF CM

AUDIO OR
NAVIGATION UNIT

KEYLESS ACCESS CM

Using stored DTCs, reference the Check Sheet to identify the failure location in the Network
Diagram.

J/C

J/C

ECM

CVT

STEERING ANGLE SENSOR

REMOTE ENGINE
STARTER

IMMOBILIZER CM

IMPACT SENSOR

POWER STEERING CM

BODY
INTEGRATED
UNIT

COMBINATION
METER

LAN01569

2-50

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

BAT

-

-

EYE

-

U1712

-

U1235

-

-

-

-

BIU

-

-

RDR

AHL
U0181
-

U1232

SUN
U0169
-

U1140

IMB
U0167
-

KPS

A/C
U0164
-

ACT

AVN
U0162
-

-

U0327

MET
U0155

-

U0284

A/B
U0151

-

PRG

BIU
U0140

-

-

U0230

EPS
U0131

-

-

U0208 SEAT

EPB
U0128

-

STA

-

-

VDC

-

-

U0126

-

U0122

-

TCM

-

U0101

-

ECM

-

U0077

U0075

ECM
VDC
EPS
TCM
RDR
A/C
A/B
EYE
BIU
AHL
SRF
RES
AVN
IMB
KPS
IMP
MET

U0074

(A)

U0073

(B)

U0100

Network Diagram

-

-

-

-

-

-

-

-

-

-

LAN01594

2-51
Communication Check Sheet

52

June 2014

2015 Legacy and Outback

New Technology Training

(Module 926)

This step can also be supplemented by using a new function of the SSMIII. However, the list of
ECU’s displayed does not confirm communication, only their required presence in the vehicle.
Communication for initializing should be performed with each of the ECUs separately to verify
communication.

2-52
CAN BUS Communication (1)

2-53
CAN BUS Communication (2)

2-54
CAN BUS Communication (3)

53

June 2014

2015 Legacy and Outback

New Technology Training

ECM

TCM

VDC

EPB

EPS

BIU

MET

A/C

IMB

KPS

STA

BIU

EYE

KEY

BIU

U0402

U0416

U0417

U0420

U0422

U0423

U0424

U0426

U0427

U0428

U1422

U1433

U1500

U1673

(A)

U0401

(Module 926)
Although communication may be possible with all modules on the CAN, it is possible an operating