Subaru LEGACY 2006 Manual page 4258

asieps_tobira.book 112 ページ ２００９年１０月２６日 月曜日 午前９時１６分
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Step
1 CHECK STOP LIGHT SWITCH CIRCUIT.
Check stop light switch open circuit.
2 CHECK PRESSURE SENSOR POWER SUP-
PLY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from the pres-
sure sensor.
3) Turn the ignition switch to ON.
4) Measure the voltage between pressure
sensor connector and chassis ground.
Connector & terminal
(B348) No. 1 (+) — Chassis ground (–):
3 CHECK OUTPUT VOLTAGE OF VDCCM&H/
U.
Measure the voltage between VDCCM&H/U
and chassis ground.
Connector & terminal
(B310) No. 27 (+) — Chassis ground (–):
4 CHECK POOR CONTACT OF CONNECTOR. Is there poor contact in con-
5 CHECK GROUND CIRCUIT OF PRESSURE
SENSOR.
Measure the resistance between pressure
sensor and chassis ground.
Connector & terminal
(B348) No. 3 — Chassis ground:
6 CHECK THE VDCCM&H/U GROUND CIR-
CUIT.
Measure the resistance between VDCCM&H/U
and chassis ground.
Connector & terminal
(B310) No. 12 — Chassis ground:
7 CHECK POOR CONTACT OF CONNECTOR. Is there poor contact in con-
8 CHECK PRESSURE SENSOR HARNESS.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from the
VDCCM&H/U.
3) Measure the resistance between
VDCCM&H/U and pressure sensor.
Connector & terminal
(B310) No. 11 — (B348) No. 2:
9 CHECK GROUND SHORT OF HARNESS.
Measure the resistance between VDCCM&H/U
connector and chassis ground.
Connector & terminal
(B310) No. 11 — Chassis ground:
10 CHECK THE VDCCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the Inspection Mode.
4) Read the DTC.
11 CHECK OTHER DTC DETECTION.
Check
Is the stop light switch circuit
OK?
Is the voltage 4.75 — 5.25 V? Go to step 5.
Is the voltage 4.75 — 5.25 V? Repair the har-
nector?
Is the resistance less than 0.5
Ω?
Is the resistance less than 0.5
Ω?
nector?
Is the resistance less than 0.5
Ω?
Is the resistance more than 1
MΩ?
Is DTC displayed?
Is any other DTC displayed?
VDC(diag)-112
Yes No
Go to step 2. If there is malfunc-
tion in the stop
light switch circuit,
DTC may be
recorded in the
memory.
Go to step 3.
Go to step 4.
ness between the
pressure sensor
and VDCCM&H/U.
Go to step 10.
Correct or replace
the connector.
Go to step 8. Go to step 6.
Repair the har- Go to step 7.
ness between the
pressure sensor
and VDCCM&H/U.
Go to step 10.
Correct or replace
the connector.
Go to step 9.
Repair the har-
ness between the
pressure sensor
and VDCCM&H/U.
Go to step 10. Repair the har-
ness between the
pressure sensor
and VDCCM&H/U.
Replace the Go to step 11.
VDCCM&H/U.
<Ref. to VDC-7,
VDC Control Mod-
ule and Hydraulic
Control Unit
(VDCCM&H/U).>
Perform the diag- Temporary poor
nosis according to contact occurs.
DTC.