Initial Inspection and Diagnostic Overview

Basic Diagnostic Procedure

PROCEDURE

NOTE:
- To check the harness for open or short circuits, shake problem spot or connector.
- Refer to "Check List for Interview".

Step 1-Step 3:

Step 4:

Check List for Interview

CHECK
Check the following item about the vehicle's state.

STATE OF ABS WARNING LIGHT





STATE OF VDC WARNING LIGHT AND TCS OFF INDICATOR LIGHT





STATE OF VDC INDICATOR LIGHT





CONDITIONS UNDER WHICH TROUBLE OCCURS








General Description

CAUTION

SRS AIRBAG SYSTEM
Airbag system wiring harness is routed near the ABS wheel speed sensor and VDCCM&H/U.

CAUTION:
- All airbag system wiring harness and connectors are colored yellow. Do not use the electrical test equipment on these circuits.
- Be careful not to damage the airbag system wiring harness when servicing the ABS wheel speed sensor and VDCCM&H/U.

INSPECTION
Before performing diagnosis, check the following items which might affect VDC problems.

BATTERY
Measure the battery voltage and check electrolyte.
Standard voltage: 12 V or more
Specific gravity. 1.260 or more

GROUND
Check the tightening torque of ground (GB-7) bolt of VDC.
Tightening torque: 13 N-m (1.3 kgf-m, 9.6 ft-lb)

BRAKE FLUID
1) Check the brake fluid level.
2) Check the brake fluid for leaks.

HYDRAULIC UNIT
Check the hydraulic unit.
- With brake tester Ref. to CHECKING THE HYDRAULIC UNIT VDC OPERATION WITH BRAKE TESTER, INSPECTION. Testing and Inspection
- Without brake tester Ref. to CHECKING THE HYDRAULIC UNIT VDC OPERATION USING A PRESSURE GAUGE, INSPECTION. Testing and Inspection

BRAKE DRAG
Check for brake drag.

BRAKE PAD AND ROTOR
Check the brake pad and rotor.

TIRE
Check the tire specifications, tire wear and air pressure.