Inspection steps

WARNING: This page is about a different car, the 2014 Subaru BRZ. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

When the skid control computer (brake actuator Assembly) has been replaced, make sure to perform [VDC sensor mid point setting mode]. (Refer to WORK SUPPORT )
Before performing troubleshooting, check the fuse for this circuit.

Inspection of connection for each part
1. Lightly shake the connectors and the wiring harness of the skid control computer (brake actuator Assembly) up/down/left/right, and check the ABS warning light's illumination status.
  Criteria: ABS warning light status does not change.
  
  NG: Repair or replacement of wiring harness or connector
  
  OK: Go to Next Step

Diagnostic code check (CAN communication system)

Check CAN communication system. (Refer to HOW TO TROUBLESHOOT )

RESULT

Result	Go to
No output	A
Output exists	B

B: To CAN communication system (How to troubleshoot) (Refer to HOW TO TROUBLESHOOT )

A: Go to Next Step

Check wiring harness and connector (+BS, IG1, GND1, GND2 terminals)

Check the connector of the skid control computer (brake actuator Assembly) for a trouble such as poor engagement or disconnection.
Criteria: No trouble
Turn IG OFF and disconnect the connector A5 from the skid control computer (brake actuator Assembly).
Check the case and terminal of the connector for deformation and/or corrosion.
Criteria: No deformation or corrosion.

Check the voltage and resistance between terminals.

VOLTAGE

Inspection terminals	Inspection conditions	Standard value
A5-25(+BS) - chassis ground	Always	11 to 14 V
A5-28(IG1) - chassis ground	IG ON	11 to 14 V

RESISTANCE

Inspection terminals	Inspection conditions	Standard value
A5-38(GND1) - chassis ground	Always	Less than 1 Ω
A5-13(GND2) - chassis ground	Always	Less than 1 Ω

Fig 1: Identifying Skid Control Computer (Brake Actuator Assembly) Connector Terminals

Courtesy of SUBARU OF AMERICA, INC.

NOTE: If there is a malfunction in GND1 and GND2 terminals, check the ground point for looseness.

NG: Repair or replacement of wiring harness or connector

OK: To meter & gauge system (How to troubleshoot) (Refer to HOW TO TROUBLESHOOT )