2. Unexpected Pedal Action

CHECK BRAKE PEDAL TRAVEL
Check brake pedal travel. Is brake pedal travel excessive?
- YES: Perform Preliminary Check. Refer to "PRELIMINARY CHECK ".
- NO: GO TO 2.
  
  Fig 1: Checking Brake Pedal Operation
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK BASE BRAKING SYSTEM PERFORMANCE
Disconnect the ABS actuator and electric unit (control unit) connector E125 and verify that the braking force is sufficient when the ABS is not operating. After the inspection, reconnect the connector.

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.

OK or NG
- OK: GO TO 3.
- NG: Perform Preliminary Check. Refer to "PRELIMINARY CHECK ".
CHECK WARNING LAMP INDICATION
Ensure warning lamp remains off while driving.

Is warning lamp turned off?
- YES: GO TO 4.
- NO: Carry out self-diagnosis. Refer to "SELF-DIAGNOSIS PROCEDURE ".
  
  Fig 2: Identifying ABS Warning Lamp
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK WHEEL SENSORS
1. Check wheel sensor connector for terminal damage or loose connections.
2. Perform wheel sensor check.
  Refer to "WHEEL SENSOR OR ROTOR ".
Are wheel sensors functioning properly?
- YES: Check ABS actuator and electric unit (control unit) pin terminals for damage and the connection of ABS actuator and electric unit (control unit) harness connector. Reconnect ABS actuator and electric unit (control unit) harness connector. Then retest.
- NO: Repair as necessary.