Subaru Legacy 2004 Service Manual page 2333

Diagnostic Procedure without Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
11 CHECK INPUT SIGNAL TO BODY INTE-
GRATED UNIT.
1) Shift and hold the select lever to up side.
2) Check the signal voltage for body inte-
grated unit.
Connector & terminal
(B281) No. 15 (+) — Chassis ground (
12 CHECK BODY INTEGRATED UNIT.
1) Turn the ignition switch to ON.
2) Shift and hold the select lever to down side.
3) Read the data of up-shift switch using Sub-
aru Select Monitor. <Ref. to LAN(diag)-14,
OPERATION, Subaru Select Monitor.>
13 CHECK BODY INTEGRATED UNIT.
Check the DTC of body integrated unit.
14 CHECK SPORT SHIFT SWITCH CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from SPORT
shift switch.
3) Measure the resistance of harness
between SPORT shift switch connector and
chassis ground.
Connector & terminal
(B116) No. 10 (+) — Chassis ground (
15 CHECK SPORT SHIFT SWITCH.
Measure the resistance between SPORT shift
switch terminals.
Connector & terminal
(B116) No. 10 — No. 9:
16 CHECK SPORT SHIFT SWITCH.
1) Shift and hold the select lever to down side.
2) Measure the resistance between SPORT
shift switch terminals.
Connector & terminal
(B116) No. 10 — No. 9:
17 CHECK HARNESS CONNECTOR BETWEEN
BODY INTEGRATED UNIT AND SPORT
SHIFT SWITCH.
1) Disconnect the connector from body inte-
grated unit.
2) Measure the resistance of harness
between body integrated unit and SPORT shift
switch connector.
Connector & terminal
(B116) No. 9 — (B281) No. 25:
18 CHECK HARNESS CONNECTOR BETWEEN
BODY INTEGRATED UNIT AND SPORT
SHIFT SWITCH.
Measure the resistance of harness between
SPORT shift switch connector and chassis
ground.
Connector & terminal
(B116) No. 9 — Chassis ground:
Check
Is the voltage less than 1 V?
$
):
Is ON displayed?
Is DTC of CAN communication
displayed?
Is the resistance less than 1
"?
$
):
Is the resistance more than 1
M"?
Is the resistance less than 1
"?
Is the resistance less than 1
"?
Is the resistance more than 1
M"?
4AT(diag)-130
Yes
Go to step 12. Replace the TCM.
<Ref. to 4AT-65,
Transmission Con-
trol Module
(TCM).>
Go to step 13. Go to step 14.
Perform the diag- Check the TCM.
nosis according to
DTC.
Go to step 15. Repair the open
circuit in harness
between SPORT
shift switch and
chassis ground.
Go to step 16. Replace the guide
plate assembly.
Go to step 17. Replace the guide
plate assembly.
Go to step 18. Repair the open
circuit in harness
between SPORT
shift switch con-
nector and TCM
connector, or poor
contact in cou-
pling connector.
Go to step 19. Repair the short
circuit in harness
between SPORT
shift switch con-
nector and TCM
connector.
No