Subaru Legacy 2005 Service Manual page 4179

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
15 CHECK HARNESS.
1) Disconnect the VDC/ABSCM connector.
2) Measure the resistance between body inte-
grated module connector terminals.
Connector & terminal
(B280) No. 20 — No. 30:
16 CHECK HARNESS.
1) Connect the VDC/ABSCM connector, and
disconnect the ECM connector (B136 or
B137).
2) Measure the resistance between body inte-
grated module connector terminals.
Connector & terminal
(B280) No. 20 — No. 30:
17 CHECK HARNESS.
1) Disconnect all the control module (body
integrated module, ECM, TCM, VDC/ABS and
steering angle sensor).
2) Measure the resistance between body inte-
grated module connector terminals.
Connector & terminal
(B280) No. 20 — No. 30:
18 CHECK HARNESS.
1) Measure the voltage between body inte-
grated module connector terminals.
2) Turn the ignition switch to ON, and discon-
nect the unit connectors in order. (TCM: B54,
VDC/ABS: B310, B301, ECM: B137, B136,
Steering angle sensor: B231)
Connector & terminal
(B280) No. 20 (+) — Chassis ground (
19 CHECK HARNESS.
1) Measure the voltage between body inte-
grated module connector terminals.
2) Turn the ignition switch to ON, and discon-
nect the unit connectors in order. (TCM: B54,
VDC/ABS: B310, B301, ECM: B137, B136,
Steering angle sensor: B231)
Connector & terminal
(B280) No. 30 (+) — Chassis ground (
Check
Is the resistance more than 30
MΩ?
Is the resistance more than 30
MΩ?
Is the resistance more than 30
MΩ?
When disconnecting, is there
any module which its voltage
decreases from 6 V or more?
−
):
When disconnecting, is there
any module which its voltage
decreases from 6 V or more?
−
):
LAN(diag)-49
LAN SYSTEM (DIAGNOSTICS)
Yes
Replace the VDC/ Go to step 16.
ABSCM. <Ref. to
VDC-7,
REMOVAL, VDC
Control Module
and Hydraulic
Control Unit
(VDCCM&H/U).>
<Ref. to ABS-6,
REMOVAL, ABS
Control Module
and Hydraulic
Control Unit
(ABSCM&H/U).>
Replace the ECM. Go to step 17.
Temporary poor Repair or replace
contact occurs. the short circuit of
the harness.
Replace the mod- Repair or replace
ule which its volt- the short circuit of
age changes. the harness.
Replace the mod- Repair or replace
ule which its volt- the short circuit of
age changes. the harness.
No