Subaru Legacy 2005 Service Manual page 4181

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK TCM.
1) Disconnect the TCM connector (B54).
2) Perform the clear memory of body inte-
grated module. <Ref. to LAN(diag)-20, CLEAR
MEMORY MODE, OPERATION, Subaru
Select Monitor.>
3) Read DTC of body integrated module.
2 CHECK STEERING ANGLE SENSOR.
1) Disconnect the steering angle sensor con-
nector (B231).
2) Perform the clear memory mode of body
integrated module. <Ref. to LAN(diag)-20,
CLEAR MEMORY MODE, OPERATION, Sub-
aru Select Monitor.>
3) Read DTC of body integrated module.
3 CHECK BODY INTEGRATED MODULE.
1) Disconnect the body integrated module
connector (B280).
2) Read the data between VDC/ABSCM and
ECM.
Check item:
• Engine speed
• Average front wheel speed (value on con-
stant driving)
4 CHECK HARNESS.
1) Disconnect the body integrated module
connector.
2) Measure the resistance between body inte-
grated module connector terminals.
Connector & terminal
(B280) No. 20 — No. 30:
5 CHECK HARNESS.
1) Disconnect the body integrated module
connector.
2) Measure the resistance between body inte-
grated module connector terminals.
Connector & terminal
(B280) No. 20 — No. 30:
6 CHECK HARNESS.
1) Disconnect the harness connector of body
integrated module.
2) Measure the resistance between body inte-
grated module connector terminals.
Connector & terminal
(B280) No. 20 — No. 30:
7 CHECK HARNESS.
1) Disconnect the VDC/ABSCM connector.
2) Measure the resistance between harness
connector terminals.
Connector & terminal
ABS
(B301) No. 11 — No. 26:
VDC
(B310) No. 13 — No. 29:
Check
Is DTC B0202 displayed on
Subaru Select Monitor?
Is DTC B0202 displayed on
Subaru Select Monitor?
Engine speed, front wheel
speed is correctly communi-
cated. (Appears same value)
Is the resistance 55 — 65 Ω?
Is the resistance 115 — 125
Ω?
Is the resistance more than 30
MΩ?
Is the resistance 115 — 125
Ω?
LAN(diag)-51
LAN SYSTEM (DIAGNOSTICS)
Yes
Go to step 2. Replace the TCM.
<Ref. to 4AT-142,
Transmission Con-
trol Device.> <Ref.
to 5AT-61, Trans-
mission Control
Module (TCM).>
Go to step 3. Replace the steer-
ing angle sensor.
<Ref. to VDC-17,
REPLACEMENT,
Steering Angle
Sensor.>
Replace the body Go to step 4.
integrated mod-
ule. <Ref. to SL-
44, Body Inte-
grated Module.>
Go to step 10. Go to step 5.
Go to step 7. Go to step 6.
Open harness on Go to step 7.
related line of body
integrated mod-
ule. Repair or
replace the open
circuit of harness.
Go to step 8. Go to step 9.
No