Inspection Procedure

NOTE: When replacing the brake actuator assembly, perform zero point CALIBRATION .

CHECK CAN COMMUNICATION SYSTEM

Check if a CAN communication system DTC is output (See DTC CHECK/CLEAR ).

Result

RESULT REFERENCE TABLE

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

B: INSPECT CAN COMMUNICATION SYSTEM (See DIAGNOSTIC TROUBLE CODE TABLE )

A: Go to next step

INSPECT DLC3

Turn the ignition switch on (IG).

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

Standard voltage

VOLTAGE SPECIFICATION TABLE

Tester Connection	Switch Condition	Specified Condition
D47-13 (TC) - D47-4 (CG)	Ignition switch on (IG)	11 to 14 V

Fig 1: Identifying DLC3 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Result

RESULT REFERENCE TABLE

Result	Proceed to
NG	A
OK	B

B: Go to step 5

A: 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

RESISTANCE SPECIFICATION TABLE

Tester Connection	Condition	Specified Condition
D47-13 (TC) - D35-23 (TC)	Always	Below 1 Ω
D47-13 (TC) - Body ground	Always	10 kΩ or higher

Fig 2: Identifying ECM & DLC3 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK HARNESS AND CONNECTOR (CG of DLC3 - BODY GROUND)

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

Standard resistance

RESISTANCE SPECIFICATION TABLE

Tester Connection	Condition	Specified Condition
D47-4 (CG) - Body ground	Always	Below 1 Ω

Fig 3: Identifying DLC3 Connector Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK ECM (TC of DLC3 INPUT)

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

Fig 4: Identifying DLC3 Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Turn the ignition switch on (IG).

Check that the check engine warning light is blinking.

Result

RESULT REFERENCE TABLE

Result	Proceed to
Check engine warning light is blinking	A
Check 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 )