Subaru IMPREZA GD 2007 Series Manual page 2667

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Diagnostic Procedure for Subaru Select Monitor Communication
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
10 CHECK INSTALLATION OF TRANSMISSION
HARNESS CONNECTOR.
11 CHECK POOR CONTACT OF CONNEC-
TORS.
12 CHECK IGNITION POWER SUPPLY CIR-
CUIT.
1) Turn the ignition switch to ON (engine OFF).
2) Measure the ignition power supply voltage
between TCM connector and chassis ground.
Connector & terminal
(B54) No. 25 (+) — Chassis ground (–):
(B54) No. 26 (+) — Chassis ground (–):
(B54) No. 27 (+) — Chassis ground (–):
13 CHECK FUSE (NO. 11).
Remove the fuse (No. 11).
14 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and
transmission.
3) Measure the resistance of harness between
TCM and transmission connector.
Connector & terminal
(B54) No. 22 — (B11) No. 19:
(B54) No. 23 — (B11) No. 19:
(B54) No. 20 — (B11) No. 20:
(B54) No. 21 — (B11) No. 20:
15 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND TRANSMISSION
GROUND.
Measure the resistance of the harness between
transmission and transmission ground.
Connector & terminal
(T4) No. 19 — Transmission ground:
(T4) No. 20 — Transmission ground:
Check
Is the transmission harness
connector inserted to the bulk-
head harness connector?
Is there poor contact in control
module power supply and data
link connector?
Is the voltage 10 — 13 V?
Is the fuse (No. 11) blown out? Replace the fuse
Is the resistance less than 1 Ω? Go to step 15.
Is the resistance less than 1 Ω? Repair the poor
4AT(D)(diag)-28
Yes No
Go to step 11. Insert the bulkhead
harness connector
to the transmis-
sion harness con-
nector.
Go to step 12.
Repair the poor
contact.
Go to step 14. Go to step 13.
Repair the open
(No. 11). If the new circuit of harness
fuse (No. 11) has between fuse (No.
blown out easily, 11) and TCM, or
repair the short cir- fuse (No. 11) and
cuit of harness battery, and poor
between fuse (No. contact of the con-
11) and TCM. nector.
Repair the open
circuit of harness
between TCM and
transmission har-
ness connector,
and poor contact of
connector.
Repair the open
contact. circuit of the har-
ness between
transmission and
transmission
ground.