Subaru LEGACY 2003 Service Manual page 237

DIAGNOSTICS CHART WITH SELECT MONITOR
Step
1 CHECK POWER SUPPLY OF STEERING AN-
GLE 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 ( − − − − ):
Is the measured value within the specified
range?
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 ( − − − − ):
Is the measured value within the specified
range?
3 CHECK POOR CONTACT IN CONNECTORS.
Is there poor contact in yaw rate sensor con-
nector?
4 CHECK GROUND CIRCUIT OF STEERING
ANGLE SENSOR.
Measure resistance between steering sensor
and chassis ground.
Connector & terminal
(B231) No. 3 — Chassis ground:
Is the measured value less than the specified
value?
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:
Is the measured value within the specified
range?
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.
Is the same diagnostic trouble code as in
the current diagnosis still being output?
Value
10 — 15 V
10 — 15 V
There is poor contact.
0.5 Ω
114 — 126 Ω
Same DTC indicated.
VDC-235
VDC (DIAGNOSTICS)
Yes
Go to step 4. Go to step 2.
Repair harness Go to step 3.
between yaw rate
sensor and
VDCCM.
Repair or replace Replace VDCCM.
VDCCM connec- <Ref. to VDC-8,
tor. VDC Control Mod-
ule (VDCCM).>
Go to step 5. Repair steering
angle sensor
ground harness.
Repair harness Go to step 6.
between steering
angle sensor and
VDCCM.
Go to step 8. Go to step 7.
No