Symptom Related Diagnostic Procedures

INSPECTION CHART FOR TROUBLE SYMPTOMS

Find out the symptom and check according to the inspection procedure chart.

INSPECTION CHART FOR TROUBLE SYMPTOMS:

CAUTION:
During ABS operation, the brake pedal may vibrate or may not be able to be depressed. Such phenomena are due to intermittent changes in hydraulic pressure inside the brake line to prevent the wheels from locking and is not an abnormality.

INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS




















ABS OPERATION INSPECTION

Wheel speed sensor output voltage inspection
1. Release parking brake after lifting vehicle.
2. Remove wheel speed sensor connector and measure current and voltage at the sensor side

CAUTION:
When measuring sensor output voltage, be sure to install resistance (R = 115 Ohms) at wheel speed sensor as shown in the picture to prevent sensor damaging.

3. Rotate the wheel to be measured approximately 1/2 to 1 rotation per second, and check the operating current and voltage between No. 1 and No. 2 using a circuit tester or an oscilloscope.

OPERATING VOLTAGE:

SIGNAL CURRENT LEVEL: