Subaru Legacy 2005 Service Manual page 2283

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
3 CHECK TCM.
1) Connect all the connectors.
2) Perform the clear memory mode.
3) Perform the inspection mode.
4) Read the DTC.
4 CHECK ANY OTHER DTC ON DISPLAY.
5 CHECK OPEN CIRCUIT IN LATERAL G SEN-
SOR OUTPUT HARNESS AND GROUND
HARNESS.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from TCM.
3) Measure the resistance between TCM con-
nector terminals.
Connector & terminal
(B54) No. 2 — No. 9:
6 CHECK GROUND SHORT OF HARNESS.
Measure the resistance between TCM connec-
tor and chassis ground.
Connector & terminal
(B54) No. 9 — Chassis ground:
7 CHECK LATERAL G SENSOR.
1) Remove the console box.
2) Remove the lateral G sensor from vehicle.
3) Connect the connector to lateral G sensor.
4) Connect the connector to the TCM.
5) Turn the ignition switch to ON.
6) Measure the voltage between lateral G
sensor connector terminals.
Connector & terminal
(B359) No. 3 (+) — No. 2 (
8 CHECK LATERAL G SENSOR.
Measure the voltage between lateral G sensor
connector terminals.
Connector & terminal
(B359) No. 3 (+) — No. 2 (
9 CHECK LATERAL G SENSOR.
Measure the voltage between lateral G sensor
connector terminals.
Connector & terminal
(B359) No. 3 (+) — No. 2 (
10 CHECK TCM.
1) Turn the ignition switch to OFF.
2) Connect all the connectors.
3) Perform the clear memory mode.
4) Perform the inspection mode.
5) Read the DTC.
11 CHECK ANY OTHER DTC ON DISPLAY.
Is the same DTC still dis-
played?
Is any other DTC displayed?
Is the resistance 5.0 — 6.0
kΩ?
Is the resistance more than 1
MΩ?
Is the voltage 2.3 — 2.7 V
when lateral G sensor is hori-
zontal?
−
):
Is the voltage 3.3 — 4.3 V
when lateral G sensor is
inclined to the right to 90°?
−
):
Is the voltage 0.7 — 1.7 V
when lateral G sensor is
inclined to the left to 90°?
−
):
Is the same DTC still dis-
played?
Is any other DTC displayed?
4AT(diag)-111
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Replace the TCM.
<Ref. to 4AT-66,
Transmission Con-
trol Module
(TCM).>
Perform the diag-
nosis according to
DTC.
Go to step 6.
Go to step 7.
Go to step 8.
Go to step 9.
Go to step 10.
Replace the TCM.
<Ref. to 4AT-66,
Transmission Con-
trol Module
(TCM).>
Perform the diag-
nosis according to
DTC.
Yes No
Go to step 4.
Temporary poor
contact occurs.
Repair the har-
ness connector
between lateral G
sensor and TCM.
Repair the har-
ness between lat-
eral G sensor and
TCM.
Replace the TCM.
<Ref. to 4AT-66,
Transmission Con-
trol Module
(TCM).>
Replace the lat-
eral G sensor.
<Ref. to 4AT-67,
Lateral G Sensor.>
Replace the lat-
eral G sensor.
<Ref. to 4AT-67,
Lateral G Sensor.>
Replace the lat-
eral G sensor.
<Ref. to 4AT-67,
Lateral G Sensor.>
Go to step 11.
Temporary poor
contact occurs.