Unexpected Pedal Action

TROUBLE DIAGNOSES FOR SYMPTOMS

Unexpected Pedal Action


1. CHECK WARNING LAMP ACTIVATION

Make sure warning lamp remains off while driving.
OK or NG
OK- GO TO 2.
NG- Carry out self-diagnosis. Scan Tool Testing and Procedures.

2. CHECK BRAKE PEDAL STROKE






Check brake pedal stroke.
Is pedal stroke excessive?
YES- Perform Basic Inspection. Basic Inspection.
NO- GO TO 3.

3. CHECK CONNECTOR AND BRAKING PERFORMANCE

1.Disconnect ABS actuator and electric unit (control unit) connector.
2.Check brake effectiveness.
NOTE:
Driving the vehicle with the ABS actuator and electric unit (control unit) disconnected may induce DTCs in electrical control units using CAN communication. After the inspection, clear all DTCs. Scan Tool Testing and Procedures.
OK or NG
OK- GO TO 4.
NG- Perform Basic Inspection. Basic Inspection.

4. CHECK WHEEL SENSORS

Check the following.
- Wheel sensor mounting for looseness
- Wheel sensors for physical damage
- Wheel sensor connectors for terminal damage or loose connections
OK or NG
OK- Check ABS actuator and electric unit (control unit) pin terminals for damage and the connection of harness connector. Reconnect ABS actuator and electric unit (control unit) harness connector.
Then retest.
NG- Repair as necessary.