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

ABS WARNING LIGHT, VDC WARNING LIGHT/VDC OFF INDICATOR LIGHT, BRAKE WARNING LIGHT (EBD WARNING LIGHT) DOES NOT GO OFF

DTC DETECTING CONDITION:

• ABS warning light circuit is open or shorted.

• VDC control warning light/VDC OFF indicator light circuit is open or shorted.

• Brake warning light (EBD warning light) circuit is open or shorted.

• Diagnosis circuit is open.

• VDC OFF switch is shorted.

TROUBLE SYMPTOM:

• When starting the engine, the ABS warning light and VDC warning light/VDC OFF indicator light are kept ON.

• After starting the engine, the brake warning light (EBD warning light) is kept on even though the parking brake is released.

NOTE:

• When pressing the VDC OFF switch for 10 seconds or more while the engine is running, the VDC OFF indicator lights go off and the switch cannot be operated any more. To recover VDC operation, turn the ignition switch from OFF to ON again.

• When the engine coolant temperature is too low, the VDC OFF indicator light illuminates. The light will turn off when the engine is warmed up.

WIRING DIAGRAM:

• LHD model

• RHD model

STEP	CHECK	YES	NO
1.CHECK INSTALLATION OF VDCCM CONNECTOR. Turn the ignition switch to OFF.	Is the VDCCM connector inserted into the VDCCM until the clamp is secured?		Insert the VDCCM connector into the VDCCM until the clamp is secured.
2.CHECK THE FAILURE LIGHT. Check the lights that do not extinguish.	Are the VDC warning light/VDC OFF indicator lights the ones that do not turn OFF?
3.CHECK WIRING HARNESS. 1) Fit one sheet of paper (thickness 1.5 mm (0.059 in)) into the switch of the VDCCM connector. 2) Turn the ignition switch to ON.	Are the ABS warning light and brake warning light (EBD warning light) still off?		Repair the front wiring harness.
4.CHECK PROTRUSION OF THE VDCCM. 1) Turn the ignition switch to OFF. 2) Check the damage to the VDCCM terminal protrusion.	Is the protrusion damaged?	Replace the VDCCM.
5.CHECK VDCCM POWER SUPPLY. 1) Disconnect the connectors from VDCCM. 2) Start the engine. 3) Run the engine at idle. 4) Measure the voltage between VDCCM connector and chassis ground. Connector & terminal (B310) No. 28 (+) — Chassis ground (−):	Is the voltage 10 — 15 V?		Repair the power supply circuit of the VDCCM.
6.CHECK POOR CONTACT OF VDCCM CONNECTOR.	Is there poor contact in the VDCCM connector?	Repair the connector.	Replace the VDCCM.
7.OPERATION OF VDC OFF SWITCH. 1) Operate the VDC OFF switch. 2) Turn the ignition switch to OFF once and turn ON again.	Do the VDC warning light/VDC OFF indicator light extinguish?	VDC is normal.
8.CHECK ENGINE COOLANT TEMPERATURE.	Warm up the engine. Is there a change in the VDC warning light/VDC OFF indicator light illumination conditions?	VDC is normal.
9.CHECK VDC OFF SWITCH. Remove and check VDC OFF switch.	Is the VDC OFF switch normal?		Replace the VDC OFF switch.
10.CHECK WIRING HARNESS. 1) Turn the ignition switch to OFF. 2) Disconnect the VDCCM connector from the VDCCM. 3) Turn the ignition switch to ON.	Do the VDC warning light/VDC OFF indicator light remain off?		Repair the wiring harness.
11.CHECK VDC OFF SWITCH HARNESS. 1) Turn the ignition switch to OFF. 2) Disconnect the ECM connector. 3) Check the insulation between ECM connector terminal and chassis ground. Connector & terminal (B310) No. 40 — Chassis ground:	Is the resistance 1 MΩ or more?	Replace the VDCCM.	Repair the VDC OFF switch circuit.