Subaru Legacy 2004 Service Manual page 2321

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
12 CHECK INPUT VOLTAGE OF LATERAL G
SENSOR.
1) Turn the ignition switch to OFF.
2) Remove the console box.
3) Remove the lateral G sensor from vehicle.
(Do not disconnect the connector.)
4) Turn the ignition switch to ON.
5) Measure the voltage between lateral G
sensor connector terminals.
Connector & terminal
(B359) No. 1 (+) — No. 2 (
13 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:
14 CHECK LATERAL G SENSOR.
1) Connect the connector to lateral G sensor.
2) Connect the connector to the TCM.
3) Turn the ignition switch to ON.
4) Measure the voltage between lateral G
sensor connector terminals.
Connector & terminal
(B359) No. 3 (+) — No. 2 (
15 CHECK LATERAL G SENSOR.
Measure the voltage between lateral G sensor
connector terminals.
Connector & terminal
(B359) No. 3 (+) — No. 2 (
16 CHECK LATERAL G SENSOR.
Measure the voltage between lateral G sensor
connector terminals.
Connector & terminal
(B359) No. 3 (+) — No. 2 (
17 CHECK POOR CONTACT IN CONNECTOR.
Turn the ignition switch to OFF.
18 CHECK ABSCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
19 CHECK OTHER DTC DETECTION.
Is the voltage 4.75 — 5.25 V? Go to step 13.
$
):
Is the resistance 5.0 — 5.6
k"?
Is the voltage 2.3 — 2.7 V
when lateral G sensor is in hor-
izontal?
$
):
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 there poor contact in con-
nector between TCM and lat-
eral G sensor?
Is the same DTC still output?
Is any other DTC detected?
4AT(diag)-118
Check Yes
Go to step 14.
Go to step 15.
Go to step 16.
Go to step 17.
Repair the con-
nector.
Replace the TCM.
<Ref. to 4AT-65,
Transmission Con-
trol Module
(TCM).>
Perform the diag-
nosis according to
DTC.
No
Repair the har-
ness connector
between lateral G
sensor and TCM.
Repair the har-
ness connector
between lateral G
sensor and TCM.
Replace the lat-
eral G sensor.
<Ref. to 4AT-66,
Lateral G Sensor.>
Replace the lat-
eral G sensor.
<Ref. to 4AT-66,
Lateral G Sensor.>
Replace the lat-
eral G sensor.
<Ref. to 4AT-66,
Lateral G Sensor.>
Go to step 18.
Go to step 19.
Temporary poor
contact occurs.