Inspection Procedure

NOTE: When replacing the brake actuator assembly, perform zero point calibration (See CALIBRATION ).

CHECK CAN COMMUNICATION SYSTEM

Check if a CAN communication system DTC is output (See HOW TO PROCEED WITH TROUBLESHOOTING ).

Result

RESULT CHART

Result	Proceed to
DTC is not output.	A
DTC is output.	B

B : REPAIR CAN COMMUNICATION SYSTEM (See DIAGNOSTIC TROUBLE CODE CHART )

A : Go to Next Step

INSPECT SKID CONTROL ECU CONNECTOR
1. Check if the skid control ECU connector is properly installed.
OK: The skid control ECU connector is properly installed.

NG : CONNECT CONNECTOR TO ECU SECURELY

OK : Go to Next Step

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BATTERY AND BODY GROUND)

Disconnect the skid control ECU connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
A19-1 (GND1) - Body ground	Always	Below 1 Ω
A19-13 (GND2) - Body ground	Always	Below 1 Ω

Measure the voltage according to the value(s) in the table below.

Standard Voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Switch Condition	Specified Condition
A19-34 (IG1) - Body ground	Ignition switch ON	11 to 14 V

Fig 1: Identifying A19 Skid Control ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

OK : Go to Next Step

PERFORM ACTIVE TEST USING TECHSTREAM (ABS WARNING LIGHT)

Connect the Techstream to the DLC3.
Start the engine.
Select the Active Test mode on the Techstream (See DATA LIST / ACTIVE TEST ).

ABS/VSC/TRAC:

ABS/VSC/TRAC REFERENCE CHART

Tester Display	Test Part	Control Range	Diagnostic Note
ABS Warning Light	ABS warning light	Warning light ON/OFF	Observe the combination meter.

OK: The ABS warning light is turned on or off.

HINT:

When the ABS warning light remains illuminated, an open in the wire harness of the combination meter or abnormalities in the meter circuit should be considered.

NG : CHECK METER/GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (See HOW TO PROCEED WITH TROUBLESHOOTING )

OK : REPLACE BRAKE ACTUATOR ASSEMBLY (See REMOVAL )