Symptom 1: Excessive ABS Function Operation Frequency

Check longitudinal brake force distribution using a brake tester. Refer to "SERVICE DATA AND SPECIFICATIONS (SDS) ".

OK or NG 

OK: GO TO 2.

NG:

• Check the following system. If any malfunction is found, repair or replace malfunctioning parts.

• Brake booster. Refer to "BRAKE BOOSTER ".
• Hydraulic line. Refer to "BRAKE PIPING AND HOSE ".
• Front brake caliper. Refer to "FRONT DISC BRAKE ".
• Rear brake caliper. Refer to "REAR DISC BRAKE ".

Make sure that there is no excessive play in the front and rear axles. Refer to Front:  "ON-VEHICLE INSPECTION AND SERVICE ", Rear:  "ON-VEHICLE INSPECTION AND SERVICE ".

OK or NG 

OK: GO TO 3.

NG: Repair.

Check wheel sensor and sensor rotor for the following.

• Wheel sensor installation for damage
• Wheel sensor rotor installation for damage
• Wheel sensor connector connection
• Wheel sensor harness inspection

OK or NG 

OK: GO TO 4.

NG:

• Replace wheel sensor or sensor rotor.
• Repair harness.

Make sure that the ABS warning lamp is turned off after the ignition switch is turned ON or when driving.

OK or NG 

OK: Normal

NG: Perform self-diagnosis. Refer to "SELF-DIAGNOSIS ".