Subaru Legacy III (2000-2003 year). Manual - part 804

VDC-252

VDC (DIAGNOSTICS)

DIAGNOSTICS CHART WITH SELECT MONITOR

7

CHECK GROUND CIRCUIT OF VDCCM.
1) Disconnect connector from VDCCM.
2) Remove cover from VDCCM connector. 

<Ref. to VDC-19, VDCCM Connector 
Cover.>

3) Connect connector to VDCCM.
4) Measure resistance between VDCCM and 

chassis ground.

Connector & terminal

(F87) No. 64 — Chassis ground:

Is the measured value less than the speci-
fied value?

0.5 

Ω

Repair harness 
between yaw rate 
and lateral G sen-
sor and VDCCM.

Go to step 8.

8

CHECK POOR CONTACT IN CONNECTORS.
Is there poor contact in VDCCM connector?

There is poor contact.

Repair or replace 
VDCCM connec-
tor.

Replace VDCCM.  
<Ref. to VDC-8, 
VDC Control Mod-
ule (VDCCM).>

9

CHECK HARNESS OF YAW RATE AND LAT-
ERAL G SENSOR.
1) Disconnect connector from VDCCM.
2) Measure resistance between VDCCM and 

yaw rate and lateral G sensor.

Connector & terminal

(F87) No. 65 — (R100) No. 4:
(F87) No. 66 — (R100) No. 1:
(F87) No. 67 — (R100) No. 2:

Is the measured value less than the speci-
fied value?

0.5 

Ω

Go to step 10.

Repair harness 
between yaw rate 
and lateral G sen-
sor and VDCCM.

10

CHECK GROUND SHORT OF HARNESS.
Measure resistance between VDCCM and 
chassis ground.

Connector & terminal

(F87) No. 65 — Chassis ground:
(F87) No. 66 — Chassis ground:
(F87) No. 67 — Chassis ground:

Does the measured value exceed the specified 
value?

1 M

Ω

Go to step 11.

Repair harness 
between yaw rate 
and lateral G sen-
sor and VDCCM.

11

CHECK BATTERY SHORT OF HARNESS.
Measure voltage between VDCCM and chas-
sis ground.

Connector & terminal

(F87) No. 65 (+) — Chassis ground (

−−−−

):

(F87) No. 66 (+) — Chassis ground (

−−−−

):

(F87) No. 67 (+) — Chassis ground (

−−−−

):

Is the measured value less than the specified 
value?

0.5 V

Go to step 12.

Repair harness 
between yaw rate 
and lateral G sen-
sor and VDCCM.

12

CHECK BATTERY SHORT OF HARNESS.
1) Turn ignition switch to ON.
2) Measure voltage between VDCCM and 

chassis ground.

Connector & terminal

(F87) No. 65 (

++++

) — Chassis ground (

−−−−

):

(F87) No. 66 (

++++

) — Chassis ground (

−−−−

):

(F87) No. 67 (

++++

) — Chassis ground (

−−−−

):

Is the measured value less than the speci-
fied value?

0.5 V

Go to step 13.

Repair harness 
between yaw rate 
and lateral G sen-
sor and VDCCM.

Step

Value

Yes

No

VDC-253

VDC (DIAGNOSTICS)

DIAGNOSTICS CHART WITH SELECT MONITOR

13

CHECK YAW RATE AND LATERAL G SEN-
SOR.
1) Turn ignition switch to OFF.
2) Install yaw rate and lateral G sensor to 

body.

3) Connect all connectors.
4) Turn ignition switch to ON.
5) Measure voltage between yaw rate and lat-

eral G sensor connector terminals.

Connector & terminal

(F87) No. 66 (+) — No. 64 (

−−−−

):

Is the measured value within the specified 
range?

2.1 — 2.9 V

Replace VDCCM.  
<Ref. to VDC-8, 
VDC Control Mod-
ule (VDCCM).>

Replace yaw rate 
and lateral G sen-
sor.  <Ref. to VDC-
22, Yaw Rate and 
Lateral G Sensor.>

Step

Value

Yes

No

VDC-254

VDC (DIAGNOSTICS)

DIAGNOSTICS CHART WITH SELECT MONITOR

AX:DTC 73 LATERAL G SENSOR OFFSET IS TOO BIG.

NOTE:
For diagnostic procedure, refer to DTC 73. <Ref. to VDC-256, DTC 73 EXCESSIVE LATERAL G SENSOR
SIGNAL, Diagnostics Chart with Select Monitor.>

AY:DTC 73 ABNORMAL LATERAL G SENSOR OUTPUT

NOTE:
For diagnostic procedure, refer to DTC 73. <Ref. to VDC-256, DTC 73 EXCESSIVE LATERAL G SENSOR
SIGNAL, Diagnostics Chart with Select Monitor.>

AZ:DTC 73 CHANGE RANGE OF LATERAL G SENSOR IS TOO BIG.

NOTE:
For diagnostic procedure, refer to DTC 73. <Ref. to
VDC-256, DTC 73 EXCESSIVE LATERAL G SEN-
SOR SIGNAL, Diagnostics Chart with Select Mon-
itor.>

VDC-255

VDC (DIAGNOSTICS)

DIAGNOSTICS CHART WITH SELECT MONITOR

MEMO: