Subaru Legacy 2005 Service Manual page 2223

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
2 CHECK FUSE.
1) Turn the ignition switch to OFF.
2) Remove the fuse (No. 8).
3 CHECK BODY INTEGRATED MODULE.
1) Turn the ignition switch to OFF.
2) Connect the Subaru Select Monitor to data
link connector.
3) Turn the ignition switch to ON. (engine
OFF)
4) Turn the Subaru Select Monitor power
switch to ON.
5) Depress the brake pedal.
6) Read the data of brake pedal switch using
Subaru Select Monitor. <Ref. to LAN(diag)-14,
OPERATION, Subaru Select Monitor.>
4 CHECK TCM.
Read the data of brake pedal switch using
Subaru Select Monitor. <Ref. to 4AT(diag)-16,
OPERATION, Subaru Select Monitor.>
5 CHECK BODY INTEGRATED MODULE IN-
PUT SIGNAL.
1) Depress the brake pedal.
2) Disconnect the connector from body inte-
grated module.
3) Measure the voltage of harness between
body integrated module and stop light switch.
Connector & terminal
LHD model (With cruise control)
(B281) No. 23 (+) — (B65) No. 3 (
LHD model (Without cruise control)
(B281) No. 23 (+) — (B64) No. 2 (
RHD model
(B281) No. 23 (+) — (B64) No. 2 (
6 CHECK HARNESS CONNECTOR BETWEEN
BODY INTEGRATED MODULE AND STOP
LIGHT SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from stop light
switch.
3) Measure the resistance of harness
between body integrated module and stop light
switch.
Connector & terminal
LHD model (With cruise control)
(B281) No. 23 — (B65) No. 3:
LHD model (Without cruise control)
(B281) No. 23 — (B64) No. 2:
RHD model
(B281) No. 23 — (B64) No. 2:
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Is the fuse (No. 8) blown out?
Is ON displayed?
Is ON displayed?
Is the voltage more than 10 V? Go to step 8.
−
):
−
):
−
):
Is the resistance less than 1
Ω?
4AT(diag)-51
Yes
Replace the fuse Go to step 3.
(No. 8). If the
replaced fuse (No.
8) has blown out
easily, repair the
short circuit of har-
ness between fuse
(No. 8) and stop
light switch.
Go to step 4. Go to step 5.
A temporary poor Replace the TCM.
contact of connec- <Ref. to 4AT-66,
tor or harness may Transmission Con-
be the cause. trol Module
Check the poor (TCM).>
contact.
Go to step 6.
Go to step 7. Repair the open
circuit of harness
between body inte-
grated module and
stop light switch.
No