Subaru 2009 IMPREZA Service Manual page 2063

Diagnostic Procedure without Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
B: CHECK SPORT SHIFT SWITCH
DIAGNOSIS:
Input signal circuit of SPORT shift switch is open or shorted.
TROUBLE SYMPTOM:
Does not shift on manual mode.
WIRING DIAGRAM:
Step
1 CHECK SPORT SHIFT INDICATOR.
1) Turn the ignition switch to ON.
2) Shift the select lever to SPORT mode.
3) Set the select lever to + side.
4) Read the SPORT shift indicator display in
combination meter.
2 CHECK SPORT SHIFT INDICATOR.
Read the SPORT shift indicator display in com-
bination meter.
3 CHECK BODY INTEGRATED UNIT.
4 CHECK TCM.
Read the "Tiptronic Mode Switch" data using
the Subaru Select Monitor.
5 CHECK HARNESS CONNECTOR BETWEEN
TCM AND SPORT SHIFT SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and
SPORT shift switch.
3) Measure the resistance of harness between
TCM and SPORT shift switch.
Connector & terminal
(B54) No. 17 — (B117) No. 7:
6 CHECK SPORT SHIFT SWITCH.
Measure the resistance between SPORT shift
switch terminals.
Connector & terminal
(B117) No. 7 — No. 8:
A: B54 TCM
SELECT
LEVER
B117
E
Is the gear position displayed? Go to step 2.
Is "2" displayed?
Is DTC of CAN communication
displayed?
Is "ON" displayed?
Is the resistance less than 1 ? Go to step 6.
Is the resistance less than 1 ? Go to step 7.
4AT(diag)-78
Check Yes
Go to step 17.
Perform the diag-
nosis according to
DTC.
Go to step 9.
B117
1 2 3 4
5 6 7 8 9 10
A:
B54
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 27
28 29 30 31 32 33 34 35
AT-04991
No
Go to step 3.
Go to step 9.
Go to step 4.
Go to step 5.
Repair the open
circuit of harness
between TCM and
SPORT shift
switch.
Replace the guide
plate assembly.