VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC DETECTING CONDITION:

• Defective motor relay

• Defective harness connector

TROUBLE SYMPTOM:

• ABS does not operate.

• VDC does not operate.

WIRING DIAGRAM:

• LHD model

• RHD model

STEP	CHECK	YES	NO
1.CHECK RESISTANCE OF MOTOR RELAY. 1) Turn the ignition switch to OFF. 2) Remove the motor relay from the relay box. 3) Measure the resistance between motor relay terminals. Terminals No. 85 — No. 86:	Is the resistance between 70 — 90 Ω?		Replace the motor relay.
2.CHECK CONTACT POINT OF MOTOR RELAY. 1) Connect the battery to motor relay terminals No. 85 and No. 86. 2) Measure the resistance between motor relay terminals. Terminals No. 30 — No. 87:	Is the resistance less than 0.5 Ω?		Replace the motor relay.
3.CHECK MOTOR RELAY SHORT. Measure the resistance between motor relay terminals. Terminals No. 85 — No. 30: No. 85 — No. 87:	Is the resistance 1 MΩ or more?		Replace the motor relay.
4.CHECK INPUT VOLTAGE OF RELAY BOX. 1) Disconnect the connectors (B369) (LHD model) and (F89) (RHD model) from relay box. 2) Disconnect the connectors from VDCCM. 3) Turn the ignition switch to ON. 4) Measure the voltage between the relay box connector and chassis ground. Connector & terminal LHD (F369) No. 2 (+) — Chassis ground (−): RHD (F89) No. 2 (+) — Chassis ground (−):	Is the voltage 10 — 15 V?		Repair the harness connector between battery and relay box and check the fuse SBF-holder.
5.CHECK INPUT VOLTAGE OF MOTOR RELAY. 1) Turn the ignition switch to OFF. 2) Connect the connectors (B369) (LHD model) and (F89) (RHD model) to relay box. 3) Turn the ignition switch to ON. 4) Measure the voltage between the relay box and chassis ground. Connector & terminal Motor relay installation point No. 87 (+) — Chassis ground (−):	Is the voltage 10 — 15 V?		Replace the relay box.
6.CHECK OPEN CIRCUIT OF THE RELAY BOX CONTACT POINT CIRCUIT. 1) Turn the ignition switch to OFF. 2) Disconnect the connectors (VDC2), (B370) (LHD model) and (F90) (RHD model) from relay box. 3) Measure the resistance between the relay box connector and motor relay installation point. Connector & terminal (VDC1) No. 1 — Motor relay installation point No. 30:	Is the resistance less than 0.5 Ω?		Replace the relay box.
7.CHECK OPEN CIRCUIT OF RELAY BOX MONITOR SYSTEM. Measure the resistance between the relay box connector and motor relay installation point. Connector & terminal (VDC4) No. 6 — Motor relay installation point No. 30:	Is the resistance less than 0.5 Ω?		Replace the relay box.
8.CHECK OPEN CIRCUIT OF RELAY BOX CONTROL CIRCUIT. Measure the resistance between the motor relay installation point and the relay box connector. Connector & terminal (VDC4) No. 4 — Motor relay installation point No. 86:	Is the resistance less than 0.5 Ω?		Replace the relay box.
9.CHECK OPEN CIRCUIT OF RELAY BOX CONTROL CIRCUIT. 1) Remove the valve relay from the relay box. 2) Measure the resistance between the motor relay installation point and the valve relay installation point. Connector & terminal Motor relay installation point No. 86 — Valve relay installation point No. 30:	Is the resistance less than 0.5 Ω?		Replace the relay box.
10.CHECK GROUND SHORT CIRCUIT IN RELAY BOX CIRCUIT. Measure the resistance between the relay box connector and chassis ground. Connector & terminal (VDC4) No. 4 — Chassis ground: (VDC4) No. 6 — Chassis ground:	Is the resistance 1 MΩ or more?		Replace the relay box.
11.CHECK BATTERY SHORT CIRCUIT IN RELAY BOX CIRCUIT. Measure the voltage between the relay box connector and chassis ground. Connector & terminal (VDC4) No. 6 (+) — Chassis ground (−):	Is the voltage less than 1 V?		Replace the relay box.
12.CHECK BATTERY SHORT CIRCUIT IN RELAY BOX CIRCUIT. 1) Turn the ignition switch to ON. 2) Measure the voltage between the relay box connector and chassis ground. Connector & terminal (VDC4) No. 6 (+) — Chassis ground (−):	Is the voltage less than 1 V?		Replace the relay box.
13.CHECK OPEN CIRCUIT OF RELAY CONTROL SYSTEM HARNESS CIRCUIT. Measure the resistance between VDCCM connector and relay box connector. Connector & terminal LHD (B310) No. 22 — (B370) No. 4: (B310) No. 9 — (B370) No. 6: RHD (B310) No. 22 — (F90) No. 4: (B310) No. 9 — (F90) No. 6:	Is the resistance less than 0.5 Ω?		Repair the harness connector between the VDCCM and relay box.
14.CHECK HARNESS GROUND SHORT BETWEEN RELAY BOX AND VDCCM. Measure the resistance between VDCCM connector and chassis ground. Connector & terminal (B310) No. 22 — Chassis ground: (B310) No. 9 — Chassis ground:	Is the resistance 1 MΩ or more?		Repair the harness between VDCCM and relay box. Check the fuse SBF holder.
15.CHECK HARNESS BATTERY SHORT BETWEEN RELAY BOX AND VDCCM. Measure the voltage between VDCCM connector and chassis ground. Connector & terminal (B310) No. 9 (+) — Chassis ground (−):	Is the voltage less than 1 V?		Repair the harness between VDCCM and relay box. Check the fuse SBF holder.
16.CHECK HARNESS BATTERY SHORT BETWEEN RELAY BOX AND VDCCM. 1) Turn the ignition switch to ON. 2) Measure the voltage between VDCCM connector and chassis ground. Connector & terminal (B310) No. 9 (+) — Chassis ground (−):	Is the voltage less than 1 V?		Repair the harness between VDCCM and relay box. Check the fuse SBF holder.
17.CHECK POOR CONTACT OF CONNECTOR. Turn the ignition switch to OFF.	Is there poor contact in connectors between the VDCH/U, relay box and VDCCM?	Repair the connector.
18.CHECK VDCCM. 1) Connect all connectors. 2) Erase the memory. 3) Perform the Inspection Mode. 4) Read the DTC.	In the current diagnosis, is the same DTC displayed again?	Replace the VDCCM.
19.CHECK ANY OTHER DTC ON DISPLAY.	Are other DTCs displayed?	Go to the diagnosis corresponding to the DTC.	Temporary poor contact occurs. NOTE: The ABS warning light will remain lit until the vehicle reaches approximately 12 km/h (7.46 MPH) even when the memory is cleared. This is normal.