Subaru Legacy (2005 year). Service manual — part 632

5AT(diag)-119

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

Step

Check

Yes

No

1

CONFIRM WQUIPMENT OF VEHICLE.

Is VDC equipped with the vehi-
cle? And is there VDC OFF
switch in the instrument panel?

Go to step 2.

Go to step 4.

2

CHECK DTC OF TCM.

Is DTC of AT CAN communica-
tion detected?

Perform the diag-
nosis according to
DTC.

Go to step 3.

3

CHECK DTC OF ABS.

Is DTC of ABS detected?

Perform the diag-
nosis according to
DTC of ABS

Temporary poor
contact occurs.
Recheck the har-
ness and connec-
tor for faulty.

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.

Is the value on display 2.3 —
2.7 V when the lateral G sen-
sor is in horizontal position?

Go to step 5.

Go to step 8.

5

CHECK POOR CONTACT IN 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 6.

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.

Is the same DTC displayed?

Replace the TCM.
<Ref. to 5AT-61,
Transmission Con-
trol Module
(TCM).>

Go to step 7.

7

CHECK OTHER DTC DETECTION.

Is any other DTC displayed?

Perform the diag-
nosis according to
DTC.

Temporary poor
contact occurs.

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:

Is the resistance 5.0 — 6.0
k

Ω?

Go to step 9.

Repair the har-
ness connector
between lateral G
sensor and TCM.

9

CHECK GROUND SHORT OF HARNESS.
Measure the resistance between TCM connec-
tor and chassis ground.

Connector & terminal

(B54) No. 13 — Chassis ground:

Is the resistance more than 1
M

Ω?

Go to step 10.

Repair the har-
ness between lat-
eral G sensor and
TCM.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Con-
trol Module
(TCM).>

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 the voltage 2.3 — 2.7 V
when lateral G sensor is hori-
zontal?

Go to step 11.

Replace the lat-
eral G sensor.
<Ref. to 5AT-62,
Lateral G Sensor.>

5AT(diag)-120

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

11

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 to the right to 90

°?

Go to step 12.

Replace the lat-
eral G sensor.
<Ref. to 5AT-62,
Lateral G Sensor.>

12

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 to the left to 90

°?

Go to step 13.

Replace the lat-
eral G sensor.
<Ref. to 5AT-62,
Lateral G Sensor.>

13

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.

Is the same DTC displayed?

Replace the TCM.
<Ref. to 5AT-61,
Transmission Con-
trol Module
(TCM).>

Go to step 14.

14

CHECK OTHER DTC DETECTION.

Is any other DTC displayed?

Perform the diag-
nosis according to
DTC.

Temporary poor
contact occurs.

Step

Check

Yes

No

5AT(diag)-121

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

AP:DTC P1762 LATERAL ACCELERATION SENSOR CIRCUIT HIGH

DTC DETECTING CONDITION:
Faulty lateral G sensor output voltage
WIRING DIAGRAM:

Step

Check

Yes

No

1

CONFIRM WQUIPMENT OF VEHICLE.

Is VDC equipped with the vehi-
cle? And is there VDC OFF
switch in the instrument panel?

Go to step 2.

Go to step 4.

2

CHECK DTC OF TCM.

Is DTC of AT CAN communica-
tion detected?

Perform the diag-
nosis according to
DTC.

Go to step 3.

3

CHECK DTC OF ABS.

Is DTC of ABS detected?

Perform the diag-
nosis according to
DTC of ABS

Temporary poor
contact occurs.
Recheck the har-
ness and connec-
tor for faulty.

AT-01634

A13

B54

TCM

B359

2

1

3

B5

B6

2 3

1

B54

B359

G SENSOR

1 2 3 4

10 11 12
19 20 21

13

5 6

14 15

7

8

9

16

17

18

22

23

24

B55

A:

B55

B:

1 2

7

8

9

5 6

3 4

10 11 12
19 20 21

13

14 15

16

17

18

22

23

24

A:

B:

5AT(diag)-122

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

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.

Is the value on display 2.3 —
2.7 V when the lateral G sen-
sor is in horizontal position?

Go to step 5.

Go to step 8.

5

CHECK POOR CONTACT IN CONNECTOR. Is there poor contact in con-

nector between TCM and lat-
eral G sensor?

Repair the con-
nector.

Go to step 6.

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.

Is the same DTC displayed?

Replace the TCM.
<Ref. to 5AT-61,
Transmission Con-
trol Module
(TCM).>

Go to step 7.

7

CHECK OTHER DTC DETECTION.

Is any other DTC displayed?

Perform the diag-
nosis according to
DTC.

Temporary poor
contact occurs.

8

CHECK CONDITIONAL INFORMATION
WHEN FAULTY.
Read the lateral G sensor output on Subaru
Select Monitor display.

Is the reading on monitor dis-
play 4.65 V or more?

Go to step 9.

Go to step 15.

9

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. 1:

Is the resistance 4.3 — 4.9
k

Ω?

Go to step 10.

Repair the har-
ness connector
between lateral G
sensor and
ABSCM&H/U.

10

CHECK BATTERY SHORT OF HARNESS.
1) Turn the ignition switch to OFF.
2) Remove the console box.
3) Disconnect the connector from lateral G
sensor.
4) Disconnect the connector from TCM.
5) Measure the voltage between TCM con-
nector and chassis ground.

Connector & terminal

(B55) No. 6 (+) — Chassis ground (

−

):

Is the voltage less than 1 V?

Go to step 11.

Repair the har-
ness between lat-
eral G sensor and
TCM.

11

CHECK BATTERY SHORT OF HARNESS.
1) Turn the ignition switch to ON.
2) Measure the voltage between TCM con-
nector and chassis ground.

Connector & terminal

(B55) No. 6 (+) — Chassis ground (

−

):

Is the voltage less than 1 V?

Go to step 12.

Repair the har-
ness between lat-
eral G sensor and
TCM.

12

CHECK POOR CONTACT IN CONNECTOR. Is there poor contact in con-

nector between TCM and lat-
eral G sensor?

Repair the con-
nector.

Go to step 13.

13

CHECK TCM.
1) Connect all the 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-61,
Transmission Con-
trol Module
(TCM).>

Go to step 14.

14

CHECK OTHER DTC DETECTION.

Is any other DTC displayed?

Perform the diag-
nosis according to
DTC.

Temporary poor
contact occurs.

Step

Check

Yes

No