LAN(diag)-2
Basic Diagnostic Procedure
LAN SYSTEM (DIAGNOSTICS)
1. Basic Diagnostic Procedure
A: PROCEDURE
1. WITH SUBARU SELECT MONITOR
CAUTION:
•Subaru Select Monitor is required for reading DTC, performing diagnosis and reading current data.
•Remove foreign matter (dust, water, oil, etc.) from the body integrated unit connector during re-
moval and installation.
•For model with immobilizer, registration of immobilizer may be needed after the replacement of
controller etc. For detailed procedure, refer to the REGISTRATION MANUAL FOR IMMOBILIZER.
NOTE:
•To check harness for broken wires or short circuits, shake trouble spot or connector.
•Check List for Interview.
Step Check Yes No
1CHECK PRE-INSPECTION.
1) Ask the customer when and how the trou-
ble occurred using interview check list.
2) Check the display of communication error
display. (Combination meter, odo/trip meter)
Is the communication error dis-
played?
Go to step 3.Go to step 2.
2BASIC INSPECTION
Check the components which might affect
body control.
Is the component that might
influence the body control
problem normal?
Go to step 3.Repair or replace
each component.
3CHECK INDICATION OF DTC.
1) Read DTC of all systems.
CODE (DTC), OPERATION, Subaru Select
Monitor.>
NOTE:•The LAN system is for the overall vehicle, so
read the DTC of all systems.
•If the communication function of the Subaru
Select Monitor cannot be executed normally,
check the communication circuit.
TIALIZING IMPOSSIBLE, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>
2) Record all DTC.
Is a DTC other than CAN com-
munication displayed in the
output code?
ECU: P0600 TCU: P1718 VDC
CU: C0047 or C0057, etc.
Refer to the DTC
related table.
FUNCTION
CHECK, DTC
TA B L E , L i s t o f
Diagnostic Trou-
ble Code (DTC).>
Go to step 5.
Go to step 4.
4PERFORM GENERAL DIAGNOSTICS.
Inspect using “General Diagnostics Table”.
Is result of inspection OK? LAN system is nor-
mal.
Go to step 5.
5PERFORM DIAGNOSIS.
1) Correct the cause of trouble.
2) Perform the clear memory mode.
OPERATION, Subaru Select Monitor.>
3) Read the DTC.
OPERATION, Subaru Select Monitor.>
Is DTC displayed? Repeat step 5 until
DTC is not shown.
Finish the diagno-
sis.
LAN(diag)-5
General Description
LAN SYSTEM (DIAGNOSTICS)
3. General Description
A: CAUTION
1. SRS AIRBAG SYSTEM
Airbag system wiring harness is routed near the
body integrated unit and twisted pair line.
CAUTION:
•All airbag system wiring harness and con-
nectors are colored yellow. Do not use the elec-
trical test equipment on these circuits.
•Be careful not to damage the airbag system
wiring harness when servicing the body inte-
grated unit and LAN system.
•Refer to “Airbag System” when disconnect-
ing the air bag system connector.
2. LAN SYSTEM
•Bus line of LAN system is twisted pair line. Be
careful not to bypass or partly unbind the twisted
pair line.
•Do not make clearance between bus lines (CAN
High, CAN Low).
•Difference of bus line length should be within 10
cm (3.94 in).
•Fray near the connector should be within 8 cm
(3.14 in).
•If the characteristics of the twisted pair line are
changed, it may extremely weaken against noise.
•When repairing the harness, connect the wires
using soldering and protect it with insulating tape
etc.
B: INSPECTION
Before performing diagnostics, check the following
item which might affect body integrated unit mal-
functions.
1) Measure the battery voltage and check electro-
lyte.
Standard voltage: 12 V or more
Specific gravity: Above 1.260
2) Check the fuse condition.
Make sure that ampere of the fuse is setting value,
and it is not blown out.
3) Check the connecting condition of harness and
harness connector.
4) Confirm settings of body integrated unit are cor-
responded to vehicle equipment.
UNIT (EQUIPMENT SETTING), OPERATION,
Subaru Select Monitor.>
5) Confirm setting are corresponded to vehicle
equipment by function setting (ECM customizing)
of body integrated unit.
ERATION, Subaru Select Monitor.>
6) Confirm “Factory initial setting” of body integrat-
ed unit registrations is “Market”.
7) Confirm key illumination does not blink with igni-
tion switch turned to ON.
(A) Bypass wire connection
LAN00081
(A)
(A) Soldering and protection with insulating tape
LAN00080
(A)
LAN(diag)-6
General Description
LAN SYSTEM (DIAGNOSTICS)
C: PREPARATION TOOL
1. SPECIAL TOOL
2. GENERAL TOOL
ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS
18482AA010 CARTRIDGE Troubleshooting for electrical system.
22771AA030 SUBARU SELECT
MONITOR KIT
Tr o u b l e s h o o t i n g f o r e l e c t r i c a l s y s t e m .
TOOL NAME REMARKS
Circuit tester Used for measuring resistance, voltage and current.
ST18482AA010
ST22771AA030
LAN(diag)-7
Electrical Component Location
LAN SYSTEM (DIAGNOSTICS)
4. Electrical Component Location
A: LOCATION
(1) Body integrated unit (6) Transmission Control Module
(TCM)
(10) Odo/trip meter
(2) Engine Control Module (ECM) (11) Yaw rate sensor
(3) Auto A/C control module (7) Combination meter (12) Center monitor (navigation moni-
tor or MFD)(4) Keyless entry control module
(Antenna)
(8) Steering angle sensor
(9) VDCCM&H/U (In engine compart-
ment)(5) A/C control panel
LAN00181
(8)
(6)
(1)
(11)
(2)
(3)
(12)(7),(10)
(4)
(9)
(5)
LAN(diag)-11
Control Module I/O Signal
LAN SYSTEM (DIAGNOSTICS)
B: WIRING DIAGRAM
Refer to the electrical wiring diagram.
Key r ing illumination out-
putB280 B4 0 VIgnition key removed, driver’s door
open
Tu r n h a z a r d o u t p u t B 2 8 0 B 1 2 0 VWhen operating keyless entry answer
back
Keyless Buzzer Output i84 A6 10 — 13 VWhen operating keyless entry answer
back
Security horn output B280 B11 0 V When operating security horn
Security indicator light i84 A33 0 VAt ignition key removed, immobilizer
operating
TPMS registration check
signal inputB281 C4 0 VWhen inputting registration check sig-
nal
Keyless communication i84 A9 Ser ial communication At keyless entr y signal received
High-speed CAN circuit
(Hi)B280 B20Between B20 — B30
Serial communication
At communicating (sending and receiv-
ing)High-speed CAN circuit
(Lo)B280 B30
Low-speed CAN circuit 1
(Hi)i84 A27Between A25 — A26
Serial communication
At communicating (sending and receiv-
ing)Low-speed CAN circuit 1
(Lo)i84 A26
Low-speed CAN circuit 2
(Hi)B280 B26Between B25 — B27
Serial communication
At communicating (sending and receiv-
ing)
(Model with auto A/C)Low-speed CAN circuit 2
(Lo)B280 B25
Immobilizer antenna B281C20 —
C21Serial communication
Immobilizer communica-
tion (Main)B280
B18
(Back-up
B28)
Serial communication
Subaru Select Monitor
communicationB280 B19 Serial communication
DescriptionConnec-
tor No.
Te r m i n a l
No.
Signal (V)
NoteIgnition switch ON
(Engine OFF)
LAN(diag)-12
Subaru Select Monitor
LAN SYSTEM (DIAGNOSTICS)
6. Subaru Select Monitor
A: OPERATION
1. READ DIAGNOSTIC TROUBLE CODE
(DTC)
NOTE:
•DTC is displayed in the sequence of inputting.
(When inputting two DTCs or more simultaneously,
they are displayed in the sequence of priority.)
•When more than two DTCs are displayed, per-
form the diagnosis of top of them.
1) Prepare the Subaru Select Monitor kit.
2) Connect the diagnosis cable to Subaru Select
Monitor.
3) Insert the cartridge to the Subaru Select Monitor.
4) Connect the Subaru Select Monitor to data link
connector.
Data link connector is located in the lower portion of
instrument panel (on the driver’s side).
CAUTION:
Do not connect the scan tools except for Suba-
ru Select Monitor.
5) Turn the ignition switch to ON (engine OFF) and
turn the Subaru Select Monitor switch to ON.
6) On the «Main Menu» display screen, select the
{Each System Check} and press the [YES] key.
7) On the «System Selection Menu» display
screen, select the {Integ. Unit mode} and press the
[YES] key.
8) On the «Integ. unit mode failure diag» screen,
select the {Diagnostic Code(s) Display} and press
the [YES] key.
NOTE:
It is possible to read the DTC at the {Check all di-
agnosis codes} on the «Main Menu», and then find
the contents to check from the DTC table.
Trouble Code (DTC).>
NOTE:
•For details concerning operation procedure, re-
fer to the “SUBARU SELECT MONITOR OPERA-
TION MANUAL”.
•For details concerning DTCs, refer to the List of
Diagnostic Trouble Code (DTC).
LAN00014
LAN00015
ST
LAN00189
(A) Power switch
LAN00017
(A)
LAN(diag)-13
Subaru Select Monitor
LAN SYSTEM (DIAGNOSTICS)
2. READ CURRENT DATA
1) On the «Main Menu» display screen, select the {Each System Check} and press the [YES] key.
2) On the «System Selection Menu» display screen, select the {Integ. Unit mode} and press the [YES] key.
3) On the «Integ. unit mode failure diag» display screen, select the {Current Data Display & Save} and press
the [YES] key.
4) On the «Current Data Display & Save» display screen, select the {12 Data Display} and press the [YES]
key.
5) Using the scroll key, scroll the display screen up or down until the desired data is shown.
•A support list contains both of analog and digital data, and they are shown in the following table.
3. DISPLAY OF ANALOG DATA
Items to be displayed Unit of measure Description Note
BATT Voltage (Control) 10 — 15 VBody integrated unit input
valueAlways
BATT Voltage (BACK UP) 10 — 15 VBody integrated unit input
valueAlways
IG power supply voltage 10 — 15 VBody integrated unit input
valueIgnition switch ON
ACC voltage 10 — 15 VBody integrated unit input
valueIgnition switch ACC
Illumination VR voltage 0 — 5 VBody integrated unit out-
put valueSmall light switch ON
Illumi. output d-ratio 0 — 100%Body integrated unit input
value
Small light ON
Illumination volume is other than bright.
Ambient temp sensor V 0 — 5 VBody integrated unit out-
put valueIgnition switch ON
Ambient temperature –40 — 87.5°CBody integrated unit out-
put valueIgnition switch ON
Fuel level voltage 0 — 8 VBody integrated unit input
valueIgnition switch ON
Fuel level resistance 0 — 102.3 ΩBody integrated unit input
valueIgnition switch ON
key-lock solenoid V 6 — 12 VBody integrated unit out-
put value
Other than parking range
Ignition ON
number of regist. 0 — 4 Key No. to register
Fr o nt W he e l S p ee d km / h C A N d a t a i np u t val u e R ec ep t io n f r o m V DC u ni t
VDC/ABS latest f-codeDTC display (Tempo-
rarily)CAN data input value
It is normal when DTC is not been input
even if this code is displayed.
Reception from VDC
Blower fan steps 0 — 2 levels CAN data input value0: OFF, 1: Low, 2: 2 levels or more
Reception from air conditioner ECM
Fuel level resistance2 0 — 102.3 ΩCAN data output value Reception from body integrated unit
Fuel consumption cc/s CAN data input valueReception from ECM and transmission to
center monitor
Coolant Temp. 40 — 130°C CAN data input value Reception from ECM
Ve h i c l e l a t e r a l Gm/s2CAN data input value Reception from VDC unit
SPORT Shift Stages 0 — 7 levels CAN data input value
(0: Light OFF; 1 — 5: Gear display; 6: Fail; 7:
AT F t e m p e r a t u r e H i g h / L o w )
Reception from TCM
Shift Position 0 — 7 levels CAN data input value
0: 1; 1: 2; 2: 3; 3: 4; 4: D; 5: N; 6: R; 7: P shift
position (There is no 8 input.)
Reception from TCM
Off delay timeOFF, Short, Normal,
Long
Body integrated unit set-
ting itemsCustomize setting
Auto lock time20, 30, 40, 50, 60 sec-
onds
Body integrated unit set-
ting itemsCustomize setting
LAN(diag)-14
Subaru Select Monitor
LAN SYSTEM (DIAGNOSTICS)
4. DISPLAY OF ON/OFF DATA
Items to be displayed Unit of measure Description Note
key-lock warning SW ON/OFFBody integrated unit input
valueOn when ignition key is inserted
Stop Light Switch ON/OFFBody integrated unit input
valueOn when brake pedal is depressed
Fr o nt fog la mp S W i n pu t O N/O FFBody integrated unit input
valueWhen front fog light is illuminated
Rear fog lamp SW input ON/OFFBody integrated unit input
value
Not supported by North American specifica-
tions
TPMS Input ON/OFFBody integrated unit input
valueOn when TPMS registration completed
lighting SW input ON/OFFBody integrated unit input
value
Not supported by North American specifica-
tions
Door key-lock SW input ON/OFFBody integrated unit input
value
Not supported by North American specifica-
tions
Door unlock SW input ON/OFFBody integrated unit input
value
Not supported by North American specifica-
tions
Driver’s door SW input ON/OFFBody integrated unit input
valueOn when driver’s door is open
P-door SW input ON/OFFBody integrated unit input
valueOn when passenger’s door is open
Rear right door SW input ON/OFFBody integrated unit input
valueOn when rear right door is open
Rear left door SW input ON/OFFBody integrated unit input
valueOn when rear left door is open
R Gate SW input ON/OFFBody integrated unit input
valueOn when trunk/rear gate is open
Manual lock SW input ON/OFFBody integrated unit input
valueManual lock switch ON
Manual unlock SW input ON/OFFBody integrated unit input
valueManual unlock switch ON
Lock SW (front hood) ON/OFFBody integrated unit input
value
Not supported by North American specifica-
tions
Bright SW input ON/OFFBody integrated unit input
valueExcept automatic A/C
Tiptronic Mode Switch ON/OFFBody integrated unit input
valueSPORT shift mode ON
TIP UP SW input ON/OFFBody integrated unit input
valueSPORT shift on and On at up operation
TIP DOWN SW input ON/OFFBody integrated unit input
valueSPORT shift on and On at down operation
P SW ON/OFFBody integrated unit input
valueOn when shift range is in parking
R wiper ON SW input ON/OFFBody integrated unit input
valueRear wiper switch ON
R wiper INT SW input ON/OFFBody integrated unit input
valueOn when rear wiper switch is in INT
R washer SW input ON/OFFBody integrated unit input
valueRear washer switch ON
wiper deicer SW input ON/OFFBody integrated unit input
valueWiper deicer switch ON
Rear defogger SW ON/OFFBody integrated unit input
valueRear defogger switch ON
Driver’s seat belt SW input ON/OFFBody integrated unit input
valueDriver’s seat buckle switch ON