Subaru Legacy 2004 Service Manual page 3109

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Step
1 CHECK INSTALLATION OF VDCCM&H/U
CONNECTOR.
1) Turn the ignition switch to OFF.
2) Check that VDCCM&H/U connector is
inserted until it is locked by clamp.
2 READ DTC.
Read the DTC. <Ref. to VDC(diag)-22, Read
Diagnostic Trouble Code (DTC).>
3 CHECK BRAKE FLUID AMOUNT.
Check the amount of brake fluid in the reser-
voir tank of master cylinder.
4 CHECK BRAKE FLUID LEVEL SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect the level switch connector (B16)
from master cylinder.
3) Measure the resistance of master cylinder
terminals.
Terminals
No. 1 — No. 2:
5 CHECK PARKING BRAKE SWITCH.
1) Disconnect the connector (R4) from park-
ing brake switch.
2) Release the parking brake.
3) Measure the resistance between parking
brake switch terminal and chassis ground.
6 CHECK GROUND SHORT OF HARNESS.
1) Disconnect the connector (i10) from combi-
nation meter.
2) Measure the resistance between combina-
tion meter connector and chassis ground.
Connector & terminal
(i10) No. A7 — Chassis ground:
7 CHECK HARNESS CONNECTOR.
1) Disconnect the connector (B310) from
VDCCM&H/U.
2) Disconnect the connector (i10) from combi-
nation meter.
3) Measure the resistance between
VDCCM&H/U connector and combination con-
nector.
Connector & terminal
(B310) No. 20 — (i10) No. A7:
8 CHECK POOR CONTACT IN CONNECTOR.
Check poor contact in all connectors.
9 CHECK VDCCM.
1) Connect the connector (B310) to
VDCCM&H/U.
2) Turn the ignition to ON.
3) Measure the resistance between combina-
tion meter connector and chassis ground.
Connector & terminal
(i10) No. A7 — Chassis ground:
Warning Light Illumination Pattern
Is the connector firmly
inserted?
Is DTC displayed?
Is the amount of brake fluid
between the lines of "MAX"
and "MIN"?
Is the resistance more than 1
M&?
Is the resistance more than 1
M&?
Is the resistance more than 1
M&?
Is the resistance less than 0.5
&?
Is there poor contact?
Is the resistance less than 0.5
&?
VDC(diag)-36
Check Yes
Go to step 2.
Perform the diag-
nosis according to
DTC.
Go to step 4.
Go to step 5.
Go to step 6.
Go to step 7.
Go to step 8.
Repair the con-
nector.
Check the combi-
nation meter.
No
Insert the
VDCCM&H/U con-
nector until it is
locked by clamp.
Go to step 3.
Replenish brake
fluid to the speci-
fied value.
Replace the mas-
ter cylinder.
Replace the park-
ing brake switch.
Repair the har-
ness connector
between combina-
tion meter brake
fluid level switch
and parking brake
switch.
Repair the har-
ness connector
between
VDCCM&H/U and
combination
meter.
Go to step 9.
Replace the
VDCCM&H/U.