Page 1041 of 2453
VDC(diag)-49
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
X: DTC C0042 POWER VOLTAGE MALFUNCTION
DTC DETECTING CONDITION:
CHECK THE VDCCM&H/U power supply voltage.
TROUBLE SYMPTOM:
•ABS does not operate.
•EBD may not operate.
•VDC does not operate.
NOTE:
Warning lights go off if voltage returns.
Page 1042 of 2453
VDC(diag)-50
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
WIRING DIAGRAM:
MAIN SBF
SBF-6
NO.33
B310
E
E
431
VDCCM & H/U
BATTERY
GENERATOR
IGNITIONSWITCH
VDC00371
B310
1234
1516171819202122232425262728293031323334353637383940414245464344568910 11 12 13 147
Page 1043 of 2453

VDC(diag)-51
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Step Check Yes No
1CHECK GENERATOR.
1) Start the engine.
2) Run the engine at idle after warming up.
3) Measure the voltage between generator
terminal B and chassis ground.
Te r m i n a l s
Generator B terminal (+) — Chassis
ground (–):
Is the voltage 10 — 15 V? Go to step 2.Repair the genera-
tor.
SC(H6DO)-19,
Generator.>
2CHECK BATTERY TERMINAL.
Tu r n t h e i g n i t i o n s w i t c h t o O F F.
Are the positive and negative
battery terminals clamped
tightly?
Go to step 3.Tighten the termi-
nal.
3CHECK THE VDCCM&H/U INPUT VOLTAGE.
1) Disconnect the connector from the
VDCCM&H/U.
2) Run the engine at idle.
3) Operate the devices such as headlights, air
conditioner, defogger, etc. which produce
much electrical loading.
4) Measure the voltage between VDCCM&H/
U connector and chassis ground.
Connector & terminal
(B310) No. 1 (+) — Chassis ground (–):
Is the voltage 10 — 15 V? Go to step 4.Repair the power
supply circuit.
4CHECK THE VDCCM&H/U GROUND CIR-
CUIT.
1) Turn the ignition switch to OFF.
2) Measure the resistance between
VDCCM&H/U connector and chassis ground.
Connector & terminal
(B310) No. 43 — Chassis ground:
Is the resistance less than 0.5
Ω?
Go to step 5.Repair the
VDCCM&H/U
ground harness.
5CHECK POOR CONTACT OF CONNEC-
TORS.
Is there poor contact in con-
nector between generator, bat-
tery and VDCCM&H/U?
Repair the con-
nector.
Go to step 6.
6CHECK THE VDCCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
Is the same DTC displayed? Replace the
VDCCM&H/U.
VDC Control Mod-
ule & Hydraulic
Control Unit
(VDCCM&H/U).>
Go to step 7.
7CHECK OTHER DTC DETECTION.Is any other DTC displayed? Perform the diag-
nosis according to
DTC.
VDC(diag)-34, List
of Diagnostic Trou-
ble Code (DTC).>
Te m p o r a r y p o o r
contact occurs.
Page 1044 of 2453
VDC(diag)-52
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Y: DTC C0047 IMPROPER CAN COMMUNICATION
DTC DETECTING CONDITION:
CAN communication line circuit is open or shorted.
TROUBLE SYMPTOM:
•ABS does not operate.
•VDC does not operate.
Step Check Yes No
1CHECK LAN SYSTEM.
Perfor m the diagnosis for LAN system.
LAN(diag)-25, OPERATION, Read Diagnostic
Tr o u b l e C o d e ( D T C ) . >
Is there any fault in LAN sys-
tem?
Pe r for m t h e d ia g -
nosis according to
DTC for LAN sys-
tem.
Go to step 2.
2CHECK POOR CONTACT OF CONNEC-
TORS.
Is there poor contact in
VDCCM&H/U connector?
Repair the con-
nector.
Go to step 3.
3CHECK THE VDCCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
Is the same DTC displayed? Replace the
VDCCM&H/U.
VDC Control Mod-
ule & Hydraulic
Control Unit
(VDCCM&H/U).>
Te m p o r a r y p o o r
contact occurs.
Page 1045 of 2453
VDC(diag)-53
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Z: DTC C0051 VALVE RELAY SYSTEM OPEN LINE
DTC DETECTING CONDITION:
Defective valve relay
TROUBLE SYMPTOM:
•ABS does not operate.
•EBD does not operate.
•VDC does not operate.
WIRING DIAGRAM:
B310
E
4443
VDCCM & H/U
1
PUMP MOTOR
M
FL INLET
MAIN SBF
SBF-6
NO.1
NO.33
E
BATTERY
IGNITIONSWITCH
SOLENOID VALVE
FR INLETRL INLETRR INLETFL OUTLETFR OUTLETRL OUTLETRR OUTLET
PRIMARY NEAR VALVESECONDARY NEAR VALVEVALVERELAY
VDC00372
B310
1234
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Page 1046 of 2453

VDC(diag)-54
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Step Check Yes No
1CHECK THE VDCCM&H/U INPUT VOLTAGE.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from the
VDCCM&H/U.
3) Run the engine at idle.
4) Measure the voltage between VDCCM&H/
U connector and chassis ground.
Connector & terminal
(B310) No. 44 (+) — Chassis ground (–):
Is the voltage 10 — 15 V? Go to step 2.Repair the har-
ness connector
between battery
and VDCCM&H/U.
2CHECK THE VDCCM&H/U GROUND CIR-
CUIT.
1) Turn the ignition switch to OFF.
2) Measure the resistance between
VDCCM&H/U connector and chassis ground.
Connector & terminal
(B310) No. 43 — Chassis ground:
Is the resistance less than 0.5
Ω?
Go to step 3.Repair the
VDCCM&H/U
ground harness.
3CHECK POOR CONTACT OF CONNEC-
TORS.
Is there poor contact in con-
nector between generator, bat-
tery and VDCCM&H/U?
Repair the con-
nector.
Go to step 4.
4CHECK THE VDCCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
Is the same DTC displayed? Replace the
VDCCM&H/U.
VDC Control Mod-
ule & Hydraulic
Control Unit
(VDCCM&H/U).>
Go to step 5.
5CHECK OTHER DTC DETECTION.Is any other DTC displayed? Perform the diag-
nosis according to
DTC.
Te m p o r a r y p o o r
contact occurs.
Page 1047 of 2453
VDC(diag)-55
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
AA:DTC C0051 VALVE RELAY SYSTEM SHORT
DTC DETECTING CONDITION:
Defective valve relay
TROUBLE SYMPTOM:
•ABS does not operate.
•VDC does not operate.
•EBD may not operate.
WIRING DIAGRAM:
B310
E
4443
VDCCM & H/U
1
PUMP MOTOR
M
FL INLET
MAIN SBF
SBF-6
NO.1
NO.33
E
BATTERY
IGNITIONSWITCH
SOLENOID VALVE
FR INLETRL INLETRR INLETFL OUTLETFR OUTLETRL OUTLETRR OUTLET
PRIMARY NEAR VALVESECONDARY NEAR VALVEVALVERELAY
VDC00372
B310
1234
1516171819202122232425262728293031323334353637383940414245464344568910 11 12 13 147
Page 1048 of 2453

VDC(diag)-56
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
AB:DTC C0052 MOTOR / MOTOR RELAY SYSTEM OPEN LINE
NOTE:
For the diagnostic procedure, refer to DTC C0052 “MOTOR SYSTEM MALFUNCTION.”
57, DTC C0052 MOTOR SYSTEM MALFUNCTION, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
Step Check Yes No
1CHECK THE VDCCM&H/U VALVE RELAY.
1) Disconnect the connector from the
VDCCM&H/U.
2) Measure the resistance between
VDCCM&H/U connector terminals.
Te r m i n a l s
No. 44 — No. 43:
Is the resistance more than 1
MΩ?
Go to step 2.Replace the
VDCCM&H/U.
VDC Control Mod-
ule & Hydraulic
Control Unit
(VDCCM&H/U).>
2CHECK POOR CONTACT OF CONNEC-
TORS.
Is there poor contact in con-
nector between generator, bat-
tery and VDCCM&H/U?
Repair the con-
nector.
Go to step 3.
3CHECK THE VDCCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
Is the same DTC displayed? Replace the
VDCCM&H/U.
VDC Control Mod-
ule & Hydraulic
Control Unit
(VDCCM&H/U).>
Go to step 4.
4CHECK OTHER DTC DETECTION.Is any other DTC displayed? Perform the diag-
nosis according to
DTC.
VDC(diag)-34, List
of Diagnostic Trou-
ble Code (DTC).>
Te m p o r a r y p o o r
contact occurs.