Subaru 2006 Legacy, Manual

Page: 3613 / 4302

5AT(diag)-120
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AQ:DTC P179 8 GEAR 1 ENGINE BRAKE
NOTE:
Refer to DTC P0771 for diagnostic procedure. <Ref. to 5AT(diag)-80, DTC P0771 SHIFT SOLENOID “E”
PERFORMANCE OR STUCK OFF, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
15 CHECK LATERAL G SENSOR INPUT VOLT-
AGE.
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 (–):
Is the voltage 4.75 — 5.25 V? Go to step
16
. Repair the har-
ness between lat-
eral G sensor and
TCM.
16 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
(B55) No. 5 — No. 6:
Is the resistance between 5.0
and 5.6 k
Ω
?
Go to step
17
. Repair the har-
ness between lat-
eral G sensor and
TCM.
17 CHECK LATERAL G SENSOR.
1) Connect the connector to lateral G sensor.
2) Connect the TCM connector.
3) Turn the ignition switch to ON.
4) Measure the voltage between lateral G
sensor connector terminals.
Connector & terminal
(B359) No. 3 (+) — No. 2 (–):
Is the voltage 2.3 — 2.7 V
when lateral G sensor is in hor-
izontal position? Go to step
1 8
. Replace the lat-
eral G sensor.
<Ref. to 5AT-57,
Lateral G Sensor.>
1 8 CHECK LATERAL G SENSOR.
Measure the voltage between lateral G sensor
connector terminals.
Connector & terminal
(B359) No. 3 (+) — No. 2 (–):
Is the voltage 3.3 — 4.3 V
when lateral G sensor is
inclined 90° to right? Go to step 19 . Replace the lat-
eral G sensor.
<Ref. to 5AT-57,
Lateral G Sensor.>
19 CHECK LATERAL G SENSOR.
Measure the voltage between lateral G sensor
connector terminals.
Connector & terminal
(B359) No. 3 (+) — No. 2 (–):
Is the voltage 0.7 — 1.7 V
when lateral G sensor is
inclined 90° to left? Go to step 20 . Replace the lat-
eral G sensor.
<Ref. to 5AT-57,
Lateral G Sensor.>
20 CHECK POOR CONTACT OF CONNECTOR.
Turn the ignition switch to OFF.
Is there poor contact in con-
nector between TCM and lat-
eral G sensor? Repair the con-
nector. Go to step 21 .
21 CHECK ABSCM&H/U.
1) Connect all connectors.
2) Perform the Clear Memory Mode.
3) Perform the Inspection Mode.
4) Read the DTC.
Is the same DTC displayed? Replace the TCM.
<Ref. to 5AT-56,
Transmission Con-
trol Module
(TCM).> Go to step 22 .
22 CHECK OTHER DTC DETECTION. Is any other DTC displayed? Perform the diag-
nosis according to
DTC. Temporary poor
contact occurs.
Step Check Yes No
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