Diagnosis Procedure

1. Turn ignition switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) connector.
3. Disconnect G sensor connector.
4. Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal.
5. Reconnect connectors and then perform the self-diagnosis.

Is any item indicated on the self-diagnosis display?

YES: GO TO 2.

NO: Poor connection of connector terminal. Replace or repair connector.

1. Turn ignition switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) connector.
3. Disconnect G sensor connector.
4. Check continuity between G sensor harness connector terminals and ABS actuator and electric unit (control unit) harness connector terminals.
   CONTINUITY SPECIFICATION
   
   

   ABS actuator and electric unit (control unit)		G sensor		Continuity
   Connector	Terminal	Connector	Terminal
   E36	13	B32	2	Existed
   	29		3
   	14		4
   	28		5

Is the inspection result normal?

YES: GO TO 3.

NO: Repair or replace malfunctioning components.

1. Turn ignition switch ON.
2. Check voltage between G sensor harness connector terminal and ground.
   VOLTAGE SPECIFICATION
   
   

   G sensor		-	Condition	Voltage
   Connector	Terminal
   B32	1	Ground	Ignition switch: ON	Battery voltage
   			Ignition switch: OFF	Approx. 0 V

Is the inspection result normal?

YES: GO TO 4.

NO: Repair or replace malfunctioning components.

1. Remove G sensor from the vehicle. Refer to "EXPLODED VIEW ".
2. Connect the following terminals between G sensor and connector.
   G SENSOR CONNECTOR TERMINAL REFERENCE
   
   

   G sensor	Harness connector
   Terminal	Connector	Terminal
   1	B32	1
   2		2
   3		3
   4		4
   5		5

3. Turn ignition switch ON.
4. Check voltage between G sensor terminals.
   VOLTAGE SPECIFICATION
   
   

   Condition	G sensor
   	Terminals 4 - 5	Terminals 3 - 5
   Horizontal	1.50 - 1.95 V	1.50 - 1.95 V
   Longitudinally 20°	3.51 - 4.14 V	3.51 - 4.14 V
   Longitudinally 40°	1.50 - 1.95 V	3.51 - 4.14 V

Is the inspection result normal?

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

NO: Replace G sensor.