Inspection Procedure

Check self-diagnosis results.

Is the above displayed in the self-diagnosis display items? 

YES: GO TO 2.

NO: INSPECTION END

Check air pressure, wear, and size.

Are the air pressure, wear, and size within the standard values? 

YES: GO TO 3.

NO: Adjust air pressure, or replace tire.

• Check the condition of the sensor mount (for looseness, etc.).
• Check the surface of the front sensor rotor rubber for damage.
• Check the rear sensor rotor for damage.

OK or NG 

OK: GO TO 4.

NG: Repair wheel sensor mount or replace the sensor rotor.

1. Disconnect ABS control unit connector and the malfunctioning wheel sensor connector E42 (FR - LH) or E27 (FR - RH) or T5 (RR - RH, LH). Check the terminal to see if it is deformed, disconnected, loose, etc., and replace it if any non-standard condition is found.
2. Reconnect connector, drive at a speed of approximately 30 km/h (19 MPH) or more for approximately 1 minute, and then perform self-diagnosis.

Is the result of self-diagnosis normal? 

YES: The connector terminal contact is loose, damaged, open or shorted.

NO: GO TO 5.

1. Turn ignition switch OFF and disconnect the wheel sensor connector E42 (FR - LH) or E27 (FR - RH) or T5 (RR - RH, LH) and ABS control unit (control unit) connector E51.
2. Check continuity between terminals. (Also check the continuity when the steering wheel is turned right and left and when the sensor harness inside the wheel well is moved.)
   Fig 1: Checking Continuity Between ABS Control Unit And Wheel Sensor Harness

   
   ABS CONTROL UNIT SPECIFICATION
   
   

   	Power system		Signal system		Ground system
   Wheel	ABS actuator and electric unit (control unit)	Wheel sensor	ABS actuator and electric unit (control unit)	Wheel sensor	ABS actuator and electric unit (control unit) (signal)	ABS actuator and electric unit (control unit) (ground)
   Front RH	24	1	9	2	24, 9	16, 30
   Front LH	22	1	7	2	22, 7
   Rear RH	28	1	13	2	28, 13
   Rear LH	26	3	11	4	26, 11

   Power system: Continuity should exist. 

   Signal system: Continuity should exist. 

   Ground system: Continuity should not exist. 

OK or NG 

OK: GO TO 6.

NG: Repair or replace harness and connector that have malfunction.

1. Disconnect malfunctioning wheel sensor connector.
2. Turn ignition switch ON and check voltage between wheel sensor harness connector power supply terminal and ground.
   WHEEL SENSOR GROUND AND VOLTAGE CHART
   
   

   Wheel	Wheel sensor	Ground	Voltage
   Front RH	1	-	8 V or more
   Front LH
   Rear RH
   Rear LH	3

   Fig 2: Checking Voltage Between Wheel Sensor Harness Connector Power Supply Terminal And Ground

   

OK or NG 

OK: Replace wheel sensor.

NG: Replace ABS actuator and electric unit (control unit).