LAN(diag)-70
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK DTC.
Read all DTCs using the Subaru Select Monitor.
<Ref. to LAN(diag)-15, READ DIAGNOSTIC
TROUBLE CODE (DTC), OPERATION, Subaru
Select Monitor.>
Is there DTC U1202?
Perform the diag-
nosis according to
DTC.
Go to step
2
.
2
CHECK DTC.
Read the DTC of body integrated unit using
Subaru Select Monitor.
Is U1223 a current malfunc-
tion?
Go to step
3
.
Go to step
7
.
3
CHECK DTC.
1) Turn the ignition switch to OFF.
2) Disconnect all connectors (B280, B310 or
B301, B55, B136, B230, B231) that are con-
nected to high speed CAN communication line.
3) Connect the disconnected connectors.
4) Turn the ignition switch to ON.
5) Read the DTC of body integrated unit using
Subaru Select Monitor.
Is U1223 a current malfunc-
tion?
Go to step
4
.
Go to step
7
.
4
CHECK HARNESS.
1) Turn the ignition switch to OFF.
2) Disconnect all connectors (B280, B310 or
B301, B55, B136, B230, B231) that are con-
nected to high speed CAN communication line.
3) Using the tester, inspect the open circuit of
harness and short (power supply-output short,
GND-output short).
Connector & terminal
Models with VDC
(B40) No. 6 — (B310) No. 35:
(B40) No. 14 — (B310) No. 10:
Models without VDC
(B40) No. 6 — (B301) No. 26:
(B40) No. 14 — (B301) No. 11:
Is harness normal?
Go to step
5
.
Repair or replace
the harness.
5
CHECK DTC.
1) Connect the disconnected connectors.
2) Start the engine.
3) Read the DTC of body integrated unit using
Subaru Select Monitor.
Is U1223 a current malfunc-
tion?
Go to step
6
.
Go to step
7
.
6
CHECK DTC.
Read all DTCs using the Subaru Select Monitor.
Is P1718 or P0600 displayed?
Replace the VDC/
ABS CM. <Ref. to
VDC-7,
REMOVAL, VDC
Control Module
and Hydraulic Con-
trol Unit
(VDCCM&H/U).>
Replace the body
integrated unit.
<Ref. to SL-50,
REMOVAL, Body
Integrated Unit.>
7
CHECK HARNESS.
1) Shake the harness used for CAN communi-
cation circuit.
2) Read the DTC of body integrated unit using
Subaru Select Monitor.
Is U1223 a current malfunc-
tion?
Repair or replace
the harness.
Go to step
8
.
8
CHECK CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect all connectors (B280, B310 or
B301, B55, B136, B230, B231) that are con-
nected to high speed CAN communication line.
Is there connector terminal
where poor contact exists?
Repair the connec-
tor terminal where
poor contact
exists, or replace
harness.
Temporary poor
contact occurs.
Summary of Contents for 2009 IMPREZA
Page 18: ...PC 4 Precaution PRECAUTION...
Page 21: ...NT 4 Note NOTE Lift Rigid rack A Attachment NT 00241 A A Attachment NT 00242 A...
Page 23: ...NT 6 Note NOTE A Front B Rear 1 Front crossmember 2 Rear differential 1 2 A B NT 00210...
Page 66: ...PI 22 Pre delivery Inspection PRE DELIVERY INSPECTION...
Page 112: ...PM 48 A C Filter PERIODIC MAINTENANCE SERVICES...
Page 219: ...IN H4SO 10 Resonator Chamber INTAKE INDUCTION...
Page 324: ...ME H4SO 106 Engine Noise MECHANICAL...
Page 388: ...SP H4SO 6 Accelerator Pedal SPEED CONTROL SYSTEMS...
Page 395: ...IG H4SO 8 Spark Plug Cord IGNITION...
Page 418: ...SC H4SO 24 Battery STARTING CHARGING SYSTEMS...
Page 725: ...EN H4SO diag 308 General Diagnostic Table ENGINE DIAGNOSTICS...
Page 926: ...GD H4SO 202 Diagnostic Trouble Code DTC Detecting Criteria GENERAL DESCRIPTION...
Page 1181: ...EX H4DOTC 16 Muffler EXHAUST...
Page 1212: ...CO H4DOTC 32 Engine Cooling System Trouble in General COOLING...
Page 1221: ...IG H4DOTC 8 Ignition Coil IGNITION...
Page 1818: ...GD H4DOTC 230 Diagnostic Trouble Code DTC Detecting Criteria GENERAL DESCRIPTION...
Page 2154: ...5MT 82 General Diagnostic Table MANUAL TRANSMISSION AND DIFFERENTIAL...
Page 2227: ...RS 20 General Diagnostic Table REAR SUSPENSION...
Page 2364: ...DS 36 General Diagnostic Table DRIVE SHAFT SYSTEM...
Page 2615: ...BR 48 General Diagnostic Table BRAKE...
Page 2624: ...PB 10 General Diagnostic Table PARKING BRAKE...
Page 2681: ...PS 58 General Diagnostic Table POWER ASSISTED SYSTEM POWER STEERING...
Page 2730: ...AC 50 General Diagnostic Table HVAC SYSTEM HEATER VENTILATOR AND A C...
Page 2961: ...SB 22 Rear Seat Belt SEAT BELT SYSTEM...
Page 3035: ...COM 6 Horn Switch COMMUNICATION SYSTEM...
Page 3070: ...GW 36 Wiper Deicer System GLASS WINDOWS MIRRORS...
Page 3092: ...IDI 22 Clock INSTRUMENTATION DRIVER INFO...
Page 3158: ...SL 54 Immobilizer Antenna SECURITY AND LOCKS...
Page 3167: ...SR 10 Sunshade SUNROOF T TOP CONVERTIBLE TOP SUNROOF...
Page 3240: ...EI 74 Ornament EXTERIOR INTERIOR TRIM...
Page 3286: ...CC 12 Neutral Position Switch CRUISE CONTROL SYSTEM...
Page 3311: ...CC diag 26 Diagnostic Procedure with Cancel Code CRUISE CONTROL SYSTEM DIAGNOSTICS...
Page 3421: ...LAN diag 88 General Diagnostic Table LAN SYSTEM DIAGNOSTICS...
Page 3486: ...WI 67 Remote Engine Start System WIRING SYSTEM...