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 DTC CHECK/CLEAR ).

Result

RESULT REFERENCE TABLE

Condition	Proceed to
CAN communication system DTC is not output	A
CAN communication system DTC is output	B

B: INSPECT CAN COMMUNICATION SYSTEM (See HOW TO PROCEED WITH TROUBLESHOOTING )

A: Go to Next Step

INSPECT DLC3

Turn the ignition switch to the ON position.

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

Standard voltage

STANDARD VOLTAGE SPECIFICATION TABLE

Tester Connection	Condition	Specified Condition
D1-13 (TC) - D1-4 (CG)	Ignition switch ON	10 to 14 V

Fig 1: Identifying DLC3 Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to step 5

NG: Go to Next Step

CHECK HARNESS AND CONNECTOR (TC of DLC3 - ECM)

Turn the ignition switch off.
Disconnect the ECM connector.

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION TABLE

Tester Connection	Condition	Specified Condition
D1-13 (TC) - E5-23 (TC)	Always	Below 1 Ω
D1-13 (TC) - Body ground	Always	10 kΩ or higher

Fig 2: Identifying DLC3 Connector Terminal With ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (TC of DLC3 - ECM)

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT)

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION TABLE

Tester Connection	Condition	Specified Condition
D1-4 (CG) - Body ground	Always	Below 1 Ω

Fig 3: Identifying DLC3 Connector Terminal

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)

OK: Go to Next Step

CHECK ECM (TC of DLC3 INPUT)

Reconnect the ECM connector.
Using the SST, connect terminals TC and CG of the DLC3.
SST 09843-18040

Fig 4: Identifying DLC3 Connector Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Turn the ignition switch to the ON position.

Check that the engine warning light is blinking.

Result

RESULT REFERENCE TABLE

Condition	Proceed to
Engine warning light is blinking	A
Engine warning light is not blinking	B

HINT:

If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part (See PROBLEM SYMPTOMS TABLE ).

B: REPAIR OR REPLACE WIRE HARNESS OR ECM (TC of ECM CIRCUIT)

A: REPLACE BRAKE ACTUATOR ASSEMBLY (See REMOVAL )