Subaru Legacy 2002 Service Manual page 2692

DIAGNOSTICS CHART WITH SELECT MONITOR
No.
1 CHECK POWER SUPPLY OF STEERING
ANGLE SENSOR.
1) Turn ignition switch to OFF.
2) Disconnect connector from steering angle
sensor.
3) Turn ignition switch to ON.
4) Measure voltage between steering angle
sensor and chassis ground.
Connector & terminal
(B231) No. 4 — Chassis ground:
2 CHECK OUTPUT VOLTAGE OF VDCCM.
1) Turn ignition switch to OFF.
2) Disconnect connector from VDCCM.
3) Remove cover for VDCCM connector.
<Ref. to VDC-19, VDC Sequence Control.>
4) Connect connector to VDCCM.
5) Turn ignition switch to ON.
6) Measure voltage between VDCCM and
chassis ground.
Connector & terminal
(F87) No. 27 — Chassis ground:
3 CHECK POOR CONTACT IN CONNEC-
TORS.
4 CHECK GROUND CIRCUIT OF STEERING
ANGLE SENSOR.
Measure resistance between steering sensor
and chassis ground.
Connector & terminal
(B231) No. 3 — Chassis ground:
5 CHECK HARNESS OF STEERING ANGLE
SENSOR.
1) Connect connector to steering angle sen-
sor.
2) Disconnect connector from VDCCM.
3) Measure resistance between VDCCM con-
nector terminals.
Connector & terminal
(F87) No. 81 — No. 83:
6 CHECK STEERING ANGLE SENSOR.
1) Turn ignition switch to OFF.
2) Connect all connectors.
3) Erase the memory.
4) Perform inspection mode.
5) Read out the diagnostic trouble code.
7 CHECK ANY OTHER DIAGNOSTIC
TROUBLE CODES APPEARANCE.
8 CHECK VDCCM.
1) Turn ignition switch to OFF.
2) Replace steering angle sensor.
3) Erase the memory.
4) Perform inspection mode.
5) Read out the diagnostic trouble code.
Step
Is the voltage between 10
and 15 V?
Is the voltage between 10
and 15 V?
Is there poor contact in
yaw rate sensor connector?
Is the resistance less than
0.5 Ω?
Is the resistance 120±6 Ω? Repair harness
Is the same diagnostic
trouble code as in the cur-
rent diagnosis still being
output?
Are other diagnostic trouble
codes being output?
Is the same diagnostic
trouble code as in the cur-
rent diagnosis still being
output?
VDC-233
Check Yes
Go to step 4.
Repair harness
between yaw rate
sensor and
VDCCM.
Repair or replace
VDCCM connec-
tor.
Go to step 5.
between steering
angle sensor and
VDCCM.
Go to step 8.
Proceed with the
diagnosis corre-
sponding to the
diagnostic trouble
code.
Replace VDCCM.
<Ref. to VDC-9,
VDC Control Mod-
ule (VDCCM).>
VDC (Diagnostics)
No
Go to step 2.
Go to step 3.
Replace VDCCM.
<Ref. to VDC-9,
VDC Control Mod-
ule (VDCCM).>
Repair steering
angle sensor
ground harness.
Go to step 6.
Go to step 7.
A temporary poor
contact.
Go to step 9.