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

DTC DETECTING CONDITION:

• Defective ABS wheel speed sensor signal (noise, irregular signal, etc.)

• Faulty tone wheel

• When a wheel is turned freely for a long time

TROUBLE SYMPTOM:

• ABS does not operate.

• VDC does not operate.

• EBD does not operate. (Depends on the content of the malfunction.)

NOTE:

At this time, the brake warning light illuminates as well as the VDC and ABS warning light.

WIRING DIAGRAM:

• LHD model

• RHD model

STEP	CHECK	YES	NO
1.CHECK WHETHER A WHEEL TURNED FREELY OR NOT.	Did the wheels turn freely for more than one minute, such as when the vehicle is jacked-up, under full-lock cornering or when the tires are not in contact with road surface?	VDC is normal. Delete the DTC. NOTE: There are cases in which the DTC is displayed when the wheel is freely rotated for a long period of time, such as when the vehicle is towed, jacked up, or held where the steering wheel is turned completely one direction.
2.CHECK TIRE SPECIFICATIONS.	Is the tire specification appropriate?		Replace the tire.
3.CHECK WEAR OF TIRE.	Is the tire worn excessively?	Replace the tire.
4.CHECK TIRE AIR PRESSURE.	Is the tire pressure correct?		Adjust the tire pressure.
5.CHECK INSTALLATION OF ABS WHEEL SPEED SENSOR.	Is the ABS wheel speed sensor installation bolt tightened to 33±10 N·m (3.3±1.0 kgf-m, 24±7 ft-lb)?		Tighten the ABS wheel speed sensor installation bolts.
6.CHECK ABS WHEEL SPEED SENSOR CLEARANCE. Measure the clearance between the tone wheel and protrusion around the wheel.	Is the clearance within the following? Front wheel: 0.3 — 0.8 mm (0.012 — 0.031 in); Rear wheel: 0.7 — 1.2 mm (0.0276 — 0.0472 in)		Adjust the clearance. NOTE: Adjust the gap using spacers (Part No. 26755AA000). If spacers cannot correct the gap, replace the worn sensor or worn tone wheel.
7.CHECK WITH AN OSCILLOSCOPE.	Is an oscilloscope available?
8.CHECK ABS WHEEL SPEED SENSOR SIGNAL. 1) Jack up the vehicle until all four wheels are off the ground. 2) Turn the ignition switch to OFF. 3) Remove the VDCCM connector cover. 4) Connect the oscilloscope to the connector. 5) Turn the ignition switch to ON. 6) Start the wheel, and measure the voltage at the specified frequency. NOTE: When this inspection is completed, VDCCM may record DTC 29. Connector & terminal (B310) No. 14 (+) — No. 13 (−) (Front RH): (B310) No. 21 (+) — No. 19 (−) (Front LH): (B310) No. 18 (+) — No. 17 (−) (Rear RH): (B310) No. 16 (+) — No. 15 (−) (Rear LH):	Is the oscilloscope pattern the same waveform as shown in the figure?
9.CHECK CONTAMINATION OF ABS WHEEL SPEED SENSOR OR TONE WHEEL. Remove the disc rotor from the hub.	Is the ABS wheel speed sensor piece or the tone wheel contaminated by dirt or other foreign matter?	Thoroughly remove dirt or other foreign matter.
10.CHECK DAMAGE OF ABS WHEEL SPEED SENSOR OR TONE WHEEL.	Is there breakage or damage in the protrusion of the ABS wheel speed sensor or the tone wheel?	Replace the ABS wheel speed sensor or tone wheel. Front: and Rear: and
11.CHECK TONE WHEEL RUNOUT. Measure the tone wheel runout.	Is the runout less than 0.05 mm (0.0020 in)?		Repair the tone wheel. Front: Rear:
12.CHECK VDCCM. 1) Turn the ignition switch to OFF. 2) Connect all connectors. 3) Erase the memory. 4) Perform the Inspection Mode. 5) Read the DTC.	Is the same DTC displayed again?	Replace the VDCCM.
13.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 if the memory is cleared. This is normal.