Subaru Legacy 2002 Service Manual page 2586

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
No.
1 CHECK INSTALLATION OF LATERAL G
SENSOR.
Check installation of lateral G sensor.
2 CHECK INPUT VOLTAGE OF G SENSOR.
1) Turn ignition switch to OFF.
2) Remove console box.
3) Disconnect connector from yaw rate and
lateral G sensor.
4) Turn ignition switch to ON.
5) Measure voltage between yaw rate and
lateral G sensor connector terminals.
Connector & terminal
(R100) No. 3 (+) — No. 6 (−):
3 CHECK YAW RATE AND LATERAL G SEN-
SOR.
1) Turn ignition switch to OFF.
2) Measure resistance between yaw rate and
lateral G sensor terminals.
Terminals
No. 3 — No. 5:
4 CHECK OPEN CIRCUIT IN YAW RATE AND
LATERAL G SENSOR OUTPUT HARNESS
AND GROUND HARNESS.
1) Connect connector to yaw rate and lateral
G sensor.
2) Disconnect connector from VDCCM.
3) Measure resistance between VDCCM con-
nector terminals.
Connector & terminal
(F87) No. 63 — No. 70:
5 CHECK GROUND SHORT IN YAW RATE
AND LATERAL G SENSOR HARNESS.
1) Disconnect connector from yaw rate and
lateral G sensor.
2) Measure resistance between VDCCM con-
nector and chassis ground.
Connector & terminal
(F87) No. 63 — Chassis ground:
(F87) No. 70 — Chassis ground:
(F87) No. 64 — Chassis ground:
6 CHECK BATTERY SHORT OF HARNESS.
Measure voltage between VDCCM connector
and chassis ground.
Connector & terminal
(F87) No. 63 (+) — Chassis ground (−):
(F87) No. 70 (+) — Chassis ground (−):
(F87) No. 64 (+) — Chassis ground (−):
7 CHECK BATTERY SHORT OF HARNESS.
1) Turn ignition switch to ON.
2) Measure voltage between VDCCM connec-
tor and chassis ground.
Connector & terminal
(F87) No. 63 (+) — Chassis ground (−):
(F87) No. 70 (+) — Chassis ground (−):
(F87) No. 64 (+) — Chassis ground (−):
Step
Is the yaw rate and lateral
G sensor fixed securely?
Is the voltage between 10
and 15 V?
Is the resistance between
4.3 and 4.9 kΩ?
Is the resistance between
4.3 and 4.9 kΩ?
Is the resistance more than
1 MΩ?
Is the voltage less than 1
V?
Is the voltage less than 1
V?
VDC-127
Check Yes
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
Go to step 6.
Go to step 7.
Go to step 8.
VDC (Diagnostics)
No
Install yaw rate
and lateral G sen-
sor securely.
Repair harness/
connector
between yaw rate
and lateral G sen-
sor and VDCCM.
Replace yaw rate
and lateral G sen-
sor. <Ref. to VDC-
22, Yaw Rate and
Lateral G Sen-
sor.>
Repair harness/
connector
between yaw rate
and lateral G sen-
sor and VDCCM.
Repair harness
between yaw rate
and lateral G sen-
sor and VDCCM.
Repair harness
between yaw rate
and lateral G sen-
sor and VDCCM.
Repair harness
between yaw rate
and lateral G sen-
sor and VDCCM.