Subaru Legacy 2005 Service Manual page 2537

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CONFIRM WQUIPMENT OF VEHICLE.
2 CHECK DTC OF TCM.
3 CHECK DTC OF ABS.
4 CHECK OUTPUT OF LATERAL G SENSOR
USING SUBARU SELECT MONITOR.
1) Select {Current Data Display & Save} in
Subaru Select Monitor.
2) Read the lateral G sensor output on Subaru
Select Monitor display.
5 CHECK POOR CONTACT IN CONNECTOR.
Turn the ignition switch to OFF.
6 CHECK ABSCM&H/U.
1) Connect all the connectors.
2) Perform the clear memory mode.
3) Perform the inspection mode.
4) Read the DTC.
7 CHECK OTHER DTC DETECTION.
8 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. 13 — (B55) No. 6:
9 CHECK GROUND SHORT OF HARNESS.
Measure the resistance between TCM connec-
tor and chassis ground.
Connector & terminal
(B54) No. 13 — Chassis ground:
10 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 (
Is VDC equipped with the vehi-
cle? And is there VDC OFF
switch in the instrument panel?
Is DTC of AT CAN communica-
tion detected?
Is DTC of ABS detected?
Is the value on display 2.3 —
2.7 V when the lateral G sen-
sor is in horizontal position?
Is there poor contact in con-
nector between TCM and lat-
eral G sensor?
Is the same DTC displayed?
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?
−
):
5AT(diag)-119
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Go to step 2.
Perform the diag-
nosis according to
DTC.
Perform the diag-
nosis according to
DTC of ABS
Go to step 5.
Repair the con-
nector.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Con-
trol Module
(TCM).>
Perform the diag-
nosis according to
DTC.
Go to step 9.
Go to step 10.
Go to step 11.
Yes No
Go to step 4.
Go to step 3.
Temporary poor
contact occurs.
Recheck the har-
ness and connec-
tor for faulty.
Go to step 8.
Go to step 6.
Go to step 7.
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 5AT-61,
Transmission Con-
trol Module
(TCM).>
Replace the lat-
eral G sensor.
<Ref. to 5AT-62,
Lateral G Sensor.>