Subaru Legacy 2002 Service Manual page 2554

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
No.
1 CHECK HARNESS BETWEEN VDCCM,
STEERING ANGLE SENSOR AND TCM.
1) Turn ignition switch OFF.
2) Disconnect connector from VDCCM, TCM
and steering angle sensor.
3) Measure resistance between VDCCM,
TCM and steering angle sensor.
Connector & terminal
(F87) No. 83 — (B56) No. 9:
(F87) No. 81 — (B56) No. 18:
(F87) No. 83 — (B231) No. 2:
(F87) No. 81 — (B231) No. 1:
2 CHECK HARNESS BETWEEN STEERING
ANGLE SENSOR AND TCM.
Measure resistance between TCM and steer-
ing angle sensor.
Connector & terminal
(B56) No. 9 — (B231) No. 2:
(B56) No. 18 — (B231) No. 1:
3 CHECK GROUND SHORT OF HARNESS.
Measure resistance between VDCCM and
chassis ground.
Connector & terminal
(F87) No. 83 — Chassis ground:
(F87) No. 81 — Chassis ground:
4 CHECK BATTERY SHORT OF SENSOR.
Measure voltage between VDCCM and chas-
sis ground.
Connector & terminal
(F87) No. 83 — Chassis ground:
(F87) No. 81 — Chassis ground:
5 CHECK BATTERY SHORT OF SENSOR.
1) Turn ignition switch to ON.
2) Measure voltage between VDCCM and
chassis ground.
Connector & terminal
(F87) No. 83 — Chassis ground:
(F87) No. 81 — Chassis ground:
6 CHECK STEERING ANGLE SENSOR.
1) Turn ignition switch to OFF.
2) Connect connector to steering angle sen-
sor.
3) Measure resistance between VDCCM con-
nector terminals.
Connector & terminal
(F87) No. 83 — No. 81:
7 CHECK POOR CONTACT IN CONNEC-
TORS.
8 CHECK VDCCM.
1) Connect connector to VDCCM.
2) Disconnect connector from steering angle
sensor.
3) Measure resistance between steering angle
sensor connector terminals.
Connector & terminal
(B231) No. 1 — No. 2:
Step
Is the resistance less than
0.5 Ω?
Is the resistance less than
0.5 Ω?
Is the resistance more than
1 MΩ?
Is the voltage less than 0.5
V?
Is the voltage less than 0.5
V?
Is the resistance 120±6 Ω? Go to step 8.
Is there poor contact in
steering angle sensor?
Is the resistance 120±6 Ω? Go to step 10.
VDC-95
Check Yes
Go to step 3.
Repair or replace
harness connector
between VDCCM
and steering
angle sensor.
Go to step 4.
Go to step 5.
Go to step 6.
Replace steering
angle sensor.
VDC (Diagnostics)
No
Go to step 2.
Repair or replace
harness connector
between TCM and
steering angle
sensor.
Repair or replace
harness connector
between VDCCM,
TCM and steering
angle sensor.
Repair or replace
harness connector
between VDCCM,
TCM and steering
angle sensor.
Repair or replace
harness connector
between VDCCM,
TCM and steering
angle sensor.
Go to step 7.
Repair or replace
steering angle
sensor connector.
Go to step 9.