Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 786
LAN(diag)-53
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
I: DTC U1213 CAN-HS VDC/ABS DATA ABNORMAL
DTC DETECTING CONDITION:
Received error data from VDC/ABS CM.
TROUBLE SYMPTOM:
It is possible that brake control error may occur.
WIRING DIAGRAM:
CAN communication system <Ref. to WI-171, WIRING DIAGRAM, CAN Communication System.>
Step
Check
Yes
No
1
Is there DTC U1202?
Perform the diag-
nosis according to
DTC.
2
CHECK DTC.
Read the DTC of body integrated unit using
Subaru Select Monitor.
Is U1213 a current malfunc-
tion?
2
1
B231
1
8
2
B380
B3
B9
B280
B:
6
14
B40
B380
1 2 3 4
17 18 19 20
5 6 7 8
21 22 23 24
9 10 11 12
25 26 27 28
13 14 15 16
29 30 31 32
4 5 6 7 8 9
6
2
7
2
8
2
9
2
0
3
2 3
1
1
3
2
3
3
3
4
3
5
3
6
3
0
1
1
1
4
1
5
1
6
1
7
1
8
1
9
1
7
3
8
3
9
3
0
4
2
1
3
1
1
4
2
4
3
4
4
4
5
4
6
4
0
2
1
2
3
2
4
2
2
2
5
2
B310
B231
1 2 3 4
B230
1
2
3
4
C: B136
16
10 11 12 13 14 15
25
24
30
9
8
7
17 18 19 20
28
21 22 23
29
32
31
1
2
3
4
5
6
27
26
33 34 35
B280
B:
1 2 3
4 5 6
7 8 9 10 11 12 13 14 15 16 17
18 19 20
21 22 23 24
25 26
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16
B40
C17
C28
C: B136
B230
3
2
B310
10
35
LAN00907
SI
SI
SI
VDC CM
ECM
DCCD CM
YAW RATE &
G SENSOR
: WITH SI-DRIVE
DATA LINK
CONNECTOR
BODY
INTEGRATED
UNIT
STEERING
ANGLE
SENSOR
LAN(diag)-54
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
3
CHECK DTC.
1) Turn the ignition switch to OFF.
2) Disconnect the VDC/ABS CM connector.
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 U1213 a current malfunc-
tion?
4
CHECK HARNESS.
1) Turn the ignition switch to OFF.
2) Shake the harness used for CAN communi-
cation circuit.
3) Turn the ignition switch to ON.
4) Read the DTC of body integrated unit using
Subaru Select Monitor.
Is U1213 a current malfunc-
tion?
Repair or replace
the harness.
5
CHECK CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector that is connected
to high speed CAN circuit.
Is there poor contact of connec-
tor terminal?
Repair the connec-
tor terminal, or
replace harness.
It is possible that
temporary poor
communication
occurs.
Step
Check
Yes
No
LAN(diag)-55
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
J: DTC U1216 HIGH-SPEED CAN (DCCD) DATA ERROR
DTC DETECTING CONDITION:
Received error data from DCCD CM.
TROUBLE SYMPTOM:
DCCD indicator blinks.
WIRING DIAGRAM:
CAN communication system <Ref. to WI-171, WIRING DIAGRAM, CAN Communication System.>
Step
Check
Yes
No
1
Is there DTC U1202?
Perform the diag-
nosis according to
DTC.
2
CHECK DTC.
Read the DTC of body integrated unit using
Subaru Select Monitor.
Is U1216 a current malfunc-
tion?
2
1
B231
1
8
2
B380
B3
B9
B280
B:
6
14
B40
B380
1 2 3 4
17 18 19 20
5 6 7 8
21 22 23 24
9 10 11 12
25 26 27 28
13 14 15 16
29 30 31 32
4 5 6 7 8 9
6
2
7
2
8
2
9
2
0
3
2 3
1
1
3
2
3
3
3
4
3
5
3
6
3
0
1
1
1
4
1
5
1
6
1
7
1
8
1
9
1
7
3
8
3
9
3
0
4
2
1
3
1
1
4
2
4
3
4
4
4
5
4
6
4
0
2
1
2
3
2
4
2
2
2
5
2
B310
B231
1 2 3 4
B230
1
2
3
4
C: B136
16
10 11 12 13 14 15
25
24
30
9
8
7
17 18 19 20
28
21 22 23
29
32
31
1
2
3
4
5
6
27
26
33 34 35
B280
B:
1 2 3
4 5 6
7 8 9 10 11 12 13 14 15 16 17
18 19 20
21 22 23 24
25 26
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16
B40
C17
C28
C: B136
B230
3
2
B310
10
35
LAN00907
SI
SI
SI
VDC CM
ECM
DCCD CM
YAW RATE &
G SENSOR
: WITH SI-DRIVE
DATA LINK
CONNECTOR
BODY
INTEGRATED
UNIT
STEERING
ANGLE
SENSOR
LAN(diag)-56
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
3
CHECK DTC.
1) Turn the ignition switch to OFF.
2) Disconnect the DCCD CM connector.
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 U1216 a current malfunc-
tion?
4
CHECK HARNESS.
1) Turn the ignition switch to OFF.
2) Shake the harness used for CAN communi-
cation circuit.
3) Turn the ignition switch to ON.
4) Read the DTC of body integrated unit using
Subaru Select Monitor.
Is U1216 a current malfunc-
tion?
Repair or replace
the harness.
5
CHECK CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector that is connected
to high speed CAN circuit.
Is there poor contact of connec-
tor terminal?
Repair the connec-
tor terminal, or
replace harness.
Temporary com-
munication failure
occurs.
Step
Check
Yes
No
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