Unexpected Pedal Action

WARNING: This page is about a different car, the 2005 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.

CHECK WARNING LAMP ACTIVATION
Make sure warning lamp remains off while driving.

OK or NG
- OK: GO TO 2.
- NG: Carry out self-diagnosis. Refer to "SELF-DIAGNOSIS ".
CHECK BRAKE PEDAL STROKE
Check brake pedal stroke.

Is brake pedal stroke excessive?
- YES: Perform Basic Inspection. Refer to "BASIC INSPECTION ".
- NO: GO TO 3.
  
  Fig 1: Checking Brake Pedal Stroke
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK CONNECTOR AND BRAKING PERFORMANCE
1. Disable ABS by disconnecting ABS actuator and electric unit (control unit) connector.
2. Drive vehicle and check brake operation.
  NOTE:
  - Stopping distance may be longer than vehicles without ABS when road condition is slippery.
  - 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. Refer to CAN COMMUNICATION SYSTEM DESCRIPTION .
OK or NG
- OK: GO TO 4.
- NG: Perform Basic Inspection. Refer to "BASIC INSPECTION ".
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) connector terminals for deformation, disconnection, looseness or damage. Reconnect ABS actuator and electric unit (control unit) harness connector. Then retest.
- NG: Repair or replace as necessary.