Subaru Legacy (2005 year). Manual — part 804
VDC(diag)-81
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AK:DTC C0052 MOTOR/MOTOR RELAY MALFUNCTION
DTC DETECTING CONDITION:
• Defective motor and motor relay
• Defective harness connector
TROUBLE SYMPTOM:
• ABS does not operate.
• VDC does not operate.
• EBD may not operate.
WIRING DIAGRAM:
VDC00321
B310
E
9
6
VDCCM & H/U
14
M
MAIN SBF
SBF-6
No.33
E
SBF-1
B310
22 23 24 25 26
21
20
19
16
15
14
13
12
11
4
5
6
7
8
9
10
3
2
1
17 18
38 39 40 41 42
37
36
35
32
31
30
29
28
27
33 34
E
10
BATTERY
IGNITION
SWITCH
SOLENOID
VALVE
PUMP MOTOR
FL INLET
RL INLET
FR INLET
RR INLET
FL OUTLET
RL OUTLET
FR OUTLET
RR OUTLET
MOTOR RELAY
PRIMARY SUCTION
PRIMARY CUT
SECONDARY CUT
VALVE RELAY
SECONDARY SUCTION
VDC(diag)-82
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
Check
Yes
No
1
CHECK INPUT VOLTAGE FOR VDCCM&H/
U.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from VDCCM&H/
U.
3) Turn the ignition switch to ON.
4) Measure the voltage between VDCCM&H/
U connector and chassis ground.
Connector & terminal
(B310) No. 9 (+) — Chassis ground (
−
):
(B310) No. 14 (+) — Chassis ground (
−
):
Is the voltage 10 — 15 V?
Repair the power
supply circuit in
VDCCM&H/U.
2
CHECK GROUND CIRCUIT OF VDCCM&H/U.
1) Turn the ignition switch to OFF.
2) Measure the resistance between
VDCCM&H/U connector and chassis ground.
Connector & terminal
(B310) No. 6 — Chassis ground:
(B310) No. 10 — Chassis ground:
Is the resistance less than 0.5
Ω?
Repair the
VDCCM&H/U
ground harness.
3
CHECK MOTOR RELAY FOR VDCCM&H/U.
Measure the resistance between VDCCM&H/U
connector terminals.
Terminals
No. 9 — No. 10:
Is the resistance more than 1
M
Ω?
Replace the
VDCCM&H/U.
4
CHECK POOR CONTACT IN CONNECTORS.
Turn the ignition switch to OFF.
Is there poor contact in con-
nector between generator, bat-
tery and VDCCM&H/U?
Repair the con-
nector.
5
CHECK VDCCM&H/U.
1) Connect all the connectors.
2) Perform the clear memory mode.
3) Perform the inspection mode.
4) Read the DTC.
Is the same DTC displayed?
Replace the
VDCCM&H/U.
<Ref. to VDC-7,
VDC Control Mod-
ule and Hydraulic
Control Unit
(VDCCM&H/U).>
6
CHECK OTHER DTC DETECTION.
Is any other DTC displayed?
Perform the diag-
nosis according to
DTC. <Ref. to
VDC(diag)-38, List
of Diagnostic Trou-
ble Code (DTC).>
Temporary poor
contact occurs.
NOTE:
Though the ABS
warning light re-
mains on at this
time, it is normal.
Drive the vehicle at
more than 12 km/h
(7 MPH) in order to
turn ABS warning
light off. Be sure to
drive the vehicle
and check the
warning light goes
off.
VDC(diag)-83
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AL:DTC C0052 MOTOR/MOTOR RELAY OFF MALFUNCTION
DTC DETECTING CONDITION:
• Defective motor relay
• Defective harness connector
TROUBLE SYMPTOM:
• ABS does not operate.
• VDC does not operate.
• EBD may not operate.
NOTE:
For the diagnostic procedure, refer to DTC C0052 “MOTOR / MOTOR RELAY MALFUNCTION” <Ref. to
VDC(diag)-81, DTC C0052 MOTOR/MOTOR RELAY MALFUNCTION, Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>
VDC(diag)-84
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AM:DTC C0052 MOTOR/MOTOR RELAY ON MALFUNCTION
DTC DETECTING CONDITION:
• Defective motor relay
• Defective harness connector
TROUBLE SYMPTOM:
• ABS does not operate.
• VDC does not operate.
• EBD may not operate.
WIRING DIAGRAM:
VDC00321
B310
E
9
6
VDCCM & H/U
14
M
MAIN SBF
SBF-6
No.33
E
SBF-1
B310
22 23 24 25 26
21
20
19
16
15
14
13
12
11
4
5
6
7
8
9
10
3
2
1
17 18
38 39 40 41 42
37
36
35
32
31
30
29
28
27
33 34
E
10
BATTERY
IGNITION
SWITCH
SOLENOID
VALVE
PUMP MOTOR
FL INLET
RL INLET
FR INLET
RR INLET
FL OUTLET
RL OUTLET
FR OUTLET
RR OUTLET
MOTOR RELAY
PRIMARY SUCTION
PRIMARY CUT
SECONDARY CUT
VALVE RELAY
SECONDARY SUCTION
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