Power - Subaru Legacy 2004 Service Manual

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK POOR CONTACT IN CONNECTORS.
Check if there is poor contact in VDCCM&H/U
power supply circuit.
2 CHECK VDCCM&H/U POWER SUPPLY CIR-
CUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the VDCCM&H/U connector.
3) Turn the ignition switch to ON.
4) Measure the voltage between VDCCM&H/
U connector terminals.
Connector & terminal
(B310) No. 14 (+) — (B310) No. 6 (
3 CHECK VDCCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
4 CHECK OTHER DTC DETECTION.
BK:DTC C0081 SYSTEM MALFUNCTION
DTC DETECTING CONDITION:
VDC long time sequential control
TROUBLE SYMPTOM:
• ABS does not operate.
• VDC does not operate.
Step
1 CHECK POOR CONTACT IN CONNECTOR. Is there poor contact in the
2 CHECK VDCCM&H/U.
1) Replace the yaw rate & lateral G sensor.
2) Connect all the connectors.
3) Erase the memory.
4) Perform the inspection mode.
5) Read the DTC.
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Check
Is there poor contact?
Is the voltage 10 — 15 V?
#
):
Is the same DTC displayed?
Is any other DTC displayed?
Check
VDCCM&H/U and yaw rate &
lateral G sensor connector?
Is the same DTC displayed?
VDC(diag)-131
Yes
Repair the con- Go to step 2.
nector.
Go to step 3. Check the power
supply circuit in
VDCCM&H/U.
Replace the Go to step 4.
VDCCM&H/U.
<Ref. to VDC-7,
VDC Control Mod-
ule & Hydraulic
Control Unit
(VDCCM&H/U).>
Perform the diag- It results from a
nosis according to temporary noise
DTC. interference.
Yes
Repair the con- Go to step 2.
nector.
Replace the Malfunction is
VDCCM&H/U. found in original
yaw rate & lateral
G sensor.
No
No