Diagnostic Procedure

WARNING: This page is about a different car, the 2003 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

Malfunction code No. 21, 22, 25, 26, 31, 32, 35, 36 or 18

NOTE: Wheel position should be distinguished by code No. except code No. 18 (sensor rotor).

INSPECTION START

Fig 1: Inspecting Wheel Sensor
Courtesy of NISSAN MOTOR CO., U.S.A.
1. GO TO 2.
CHECK CONNECTOR
1. Disconnect connectors from ABS actuator and electric unit and wheel sensor of malfunction code No. Check terminals for damage or loose connection. Then reconnect connectors.
2. Carry out self-diagnosis again.
Does warning lamp activate again?
1. Yes: GO TO 3.
2. NO: INSPECTION END
CHECK WHEEL SENSOR ELECTRICAL
1. Disconnect ABS actuator and electric unit connector.
2. Check resistance between ABS actuator and electric unit connector E111 terminals.
  Code No. 21 or 22 (Front RH wheel)
  
  Terminals 10 and 25
  
  Code No. 25 or 26 (Front LH wheel)
  
  Terminals 8 and 23
  
  Code No. 31 or 32 (Rear RH wheel)
  
  Terminals 14 and 29
  
  Code No. 35 or 36 (Rear LH wheel)
  
  Terminals 12 and 27
  
  Fig 2: Checking Wheel Sensor Electrical Circuitry
  Courtesy of NISSAN MOTOR CO., U.S.A.
Resistance:

Front 0.9 - 1.1 kohm

Rear 1.44 - 1.76 kohm

Is front resistance 0.9 - 1.1 kohm and rear resistance 1.44 - 1.76 kohm?
1. Yes: GO TO 5 .
2. NO: GO TO 4.
CHECK WHEEL SENSOR
Check each sensor for resistance.

Fig 3: Check Wheel Sensor Resistance
Courtesy of NISSAN MOTOR CO., U.S.A.

Resistance:

Front 0.9 - 1.1 kohm

Rear 1.44 - 1.76 kohm

Is front resistance 0.9 - 1.1 kohm and rear resistance 1.44 - 1.76 kohm?
1. Yes: Check the following.
  If NG, repair harness or connectors.
  - Harness connectors E111, E14, E51, B8, B69
  - Harness for open or short between wheel sensor connectors and ABS actuator and electric unit
2. NO: Replace wheel sensor.
CHECK TIRE
Check for inflation pressure, wear and size of each tire.

Are tire pressure and size correct and is tire wear within specifications?
1. Yes: GO TO 6.
2. NO: Adjust tire pressure or replace tire(s).
CHECK WHEEL BEARING
Check wheel bearing axial end play.

Is wheel bearing axial end play within specifications?
1. Yes: GO TO 7.
2. NO: Check wheel bearing. Refer to WHEEL BEARING .
CHECK SENSOR ROTOR
Check sensor rotor for teeth damage.

Is sensor rotor free from damage?
1. Yes: Check ABS actuator and electric unit pin terminals for damage or the connection of ABS actuator and electric unit harness connector. Reconnect ABS actuator and electric unit harness connector. Then retest.
2. NO: Replace sensor rotor.