Subaru Legacy IV (2008 year). Service manual - part 1174

LAN(diag)-30

Function Setting (Customize)

LAN SYSTEM (DIAGNOSTICS)

10.Function Setting (Customize)

A: OPERATION

For detailed procedures of function setting (ECM
customizing), refer to “SUBARU SELECT MONI-
TOR”. <Ref. to LAN(diag)-21, FUNCTION SET-
TING (ECM CUSTOMIZING), OPERATION,
Subaru Select Monitor.>

LAN(diag)-31

List of Diagnostic Trouble Code (DTC)

LAN SYSTEM (DIAGNOSTICS)

11.List of Diagnostic Trouble Code (DTC)

A: LIST

DTC

Item

Content of diagnosis

Note

B1100

Integ. Unit System Error

Body integrated unit inter-
nal error

<Ref. to LAN(diag)-34, DTC B1100 INTEG. 
UNIT SYSTEM ERROR, Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

B1101

BATT p/supply Malfunction Cont.

Open or short in battery 
power supply control cir-
cuit

<Ref. to LAN(diag)-35, DTC B1101 BATT P/
SUPPLY MALFUNCTION CONT, Diagnostic 
Procedure with Diagnostic Trouble Code 
(DTC).>

B1102

BATT p/supply Malfunction Backup

Open or short of battery 
power supply backup cir-
cuit

<Ref. to LAN(diag)-37, DTC B1102 BATT P/
SUPPLY MALFUNCTION BACKUP, Diagnostic 
Procedure with Diagnostic Trouble Code 
(DTC).>

B1103

Ignition Power Failure

Open or short in IGN 
power supply circuit

<Ref. to LAN(diag)-39, DTC B1103 IGNITION 
POWER FAILURE, Diagnostic Procedure with 
Diagnostic Trouble Code (DTC).>

B1104

ACC Power Failure

Open or short in ACC 
power supply circuit

<Ref. to LAN(diag)-41, DTC B1104 ACC 
POWER FAILURE, Diagnostic Procedure with 
Diagnostic Trouble Code (DTC).>

B1105

Key Interlock Circuit Abnormal

Ground short of key inter-
lock circuit

<Ref. to LAN(diag)-43, DTC B1105 KEY 
INTERLOCK CIRCUIT ABNORMAL, Diagnostic 
Procedure with Diagnostic Trouble Code 
(DTC).>

B1106

Shift Lock Circuit Failure

Ground short of shift lock 
circuit

<Ref. to LAN(diag)-45, DTC B1106 SHIFT 
LOCK CIRCUIT FAILURE, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

U1201

CAN-HS Counter Abnormal

Malfunction of high-speed 
CAN communication

<Ref. to LAN(diag)-47, DTC U1201 CAN-HS 
COUNTER ABNORMAL, Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

U1202

CAN-HS Bus Off

Any unit is cut communi-
cation.

<Ref. to LAN(diag)-51, DTC U1202 CAN-HS 
BUS OFF, Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>

U1211

CAN-HS ECM Data Abnormal

Received error data from 
ECM.

<Ref. to LAN(diag)-55, DTC U1211 CAN-HS 
ECM DATA ABNORMAL, Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

U1212

CAN-HS TCM Data Abnormal

Received error data from 
TCM.

<Ref. to LAN(diag)-57, DTC U1212 CAN-HS 
TCM DATA ABNORMAL, Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

U1213

CAN-HS VDC/ABS Data Abnormal Received error data from 

VDC/ABS module.

<Ref. to LAN(diag)-59, DTC U1213 CAN-HS 
VDC/ABS DATA ABNORMAL, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

U1221

CAN-HS ECM No-Receive Data

Not received data from 
ECM.

<Ref. to LAN(diag)-61, DTC U1221 CAN-HS 
ECM NO-RECEIVE DATA, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

U1222

CAN-HS TCM No-Receive Data

Not received data from 
TCM.

<Ref. to LAN(diag)-63, DTC U1222 CAN-HS 
TCM NO-RECEIVE DATA, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

U1223

CAN-HS VDC/ABS No-Receive 
Data

Not received data from 
VDC/ABS CM.

<Ref. to LAN(diag)-65, DTC U1223 CAN-HS 
VDC/ABS NO-RECEIVE DATA, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

U1300

CAN-LS Malfunction

Open or short in CAN-LS 
circuit, on each side or 
both sides.

<Ref. to LAN(diag)-67, DTC U1300 CAN-LS 
MALFUNCTION, Diagnostic Procedure with 
Diagnostic Trouble Code (DTC).>

LAN(diag)-32

List of Diagnostic Trouble Code (DTC)

LAN SYSTEM (DIAGNOSTICS)

U1301

CAN-LS Counter Abnormal

Malfunction of CAN-LS 
communication

<Ref. to LAN(diag)-70, DTC U1301 CAN-LS 
COUNTER ABNORMAL, Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

U1302

CAN-LS Bus Off

Any unit is cut communi-
cation.

<Ref. to LAN(diag)-73, DTC U1302 CAN-LS 
BUS OFF, Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>

U1311

CAN-LS Meter Unit Data Abnormal Received error data from 

meter.

<Ref. to LAN(diag)-76, DTC U1311 CAN-LS 
METER UNIT DATA ABNORMAL, Diagnostic 
Procedure with Diagnostic Trouble Code 
(DTC).>

U1313

CAN-LS Monitor Data Abnormal

Received error data from 
monitor.

<Ref. to LAN(diag)-78, DTC U1313 CAN-LS 
MONITOR DATA ABNORMAL, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

U1321

CAN-LS Meter No-Receive Data

Not received error data 
from meter.

<Ref. to LAN(diag)-79, DTC U1321 CAN-LS 
METER NO-RECEIVE DATA, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

B1401

M Collation NG

Immobilizer related mal-
function

<Ref. to IM(diag)-14, List of Diagnostic Trouble 
Code (DTC).>

B1402

Immobilizer Key Collation NG

Immobilizer related mal-
function

<Ref. to IM(diag)-14, List of Diagnostic Trouble 
Code (DTC).>

B1403

E/G Request NG

Immobilizer related mal-
function

<Ref. to IM(diag)-14, List of Diagnostic Trouble 
Code (DTC).>

B1500

Keyless UART Com. Malfunction

Open or short circuit in 
keyless UART circuit

<Ref. to LAN(diag)-81, DTC B1500 KEYLESS 
UART COM. MALFUNCTION, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

DTC

Item

Content of diagnosis

Note

LAN(diag)-33

List of Diagnostic Trouble Code (DTC)

LAN SYSTEM (DIAGNOSTICS)

1. DTC TABLE

NOTE:
When more than two DTC codes are recorded, referring to their combination will make it easy to identify the
possible cause. Refer to the list for typical examples.

DTC to Check

Diagnostic Code that was displayed.

Probable cause

Body 

integrated

unit

ECM

TCM

VDC/

ABSCM

Combination

meter display 

(except for 

meter with MID)

B1100 <Ref. to LAN(diag)-34, 

DTC B1100 INTEG. UNIT SYS-

TEM ERROR, Diagnostic Proce-

dure with Diagnostic Trouble 

Code (DTC).>

B1100

 — 

 — 

 — 

Er IU

There could be a problem 
in the body integrated unit.

U1221 <Ref. to LAN(diag)-61, 

DTC U1221 CAN-HS ECM NO-

RECEIVE DATA, Diagnostic Pro-

cedure with Diagnostic Trouble 

Code (DTC).>

U1221

 — 

P1718

C0057

Er HC

It is possible that the ECM 
is faulty.

U1222 <Ref. to LAN(diag)-63, 

DTC U1222 CAN-HS TCM NO-

RECEIVE DATA, Diagnostic Pro-

cedure with Diagnostic Trouble 

Code (DTC).>

U1222

P0600

 — 

C0057

Er HC

It is possible that the TCM 
is faulty.

U1223 <Ref. to LAN(diag)-65, 

DTC U1223 CAN-HS VDC/ABS 
NO-RECEIVE DATA, Diagnostic 

Procedure with Diagnostic Trou-

ble Code (DTC).>

U1223

P0600

P1718

 — 

Er HC

It is possible that the VDC/
ABSCM is faulty.

U1321 <Ref. to LAN(diag)-79, 

DTC U1321 CAN-LS METER 

NO-RECEIVE DATA, Diagnostic 
Procedure with Diagnostic Trou-

ble Code (DTC).>

U1321

 — 

 — 

 — 

 — 

It is possible that the com-
bination meter is faulty.

U1313 <Ref. to LAN(diag)-78, 

DTC U1313 CAN-LS MONITOR 

DATA ABNORMAL, Diagnostic 

Procedure with Diagnostic Trou-

ble Code (DTC).>

U1313

 — 

 — 

 — 

 — 

It is possible that the navi-
gation monitor is faulty.

B1500 <Ref. to LAN(diag)-81, 

DTC B1500 KEYLESS UART 

COM. MALFUNCTION, Diagnos-

tic Procedure with Diagnostic 

Trouble Code (DTC).>

B1500

 — 

 — 

 — 

 — 

It is possible that the key-
less entry module is faulty.