Inspection Procedure

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

CHECK CAN COMMUNICATION SYSTEM

Check if the CAN communication system DTC is output (See DIAGNOSIS SYSTEM ).

Result

RESULT REFERENCE

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

B: INSPECT CAN COMMUNICATION SYSTEM

A: Go to Next Step

INSPECT DLC3

Turn the engine switch on (IG).

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

Standard voltage

STANDARD VOLTAGE SPECIFICATION

Tester Connection	Condition	Specified Condition
E21-13 (TC) - E21-4 (CG)	Engine switch on (IG)	10 to 14 V

Fig 1: Identifying Terminal CG And TC Of DLC3

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 engine switch off.
Disconnect the ECM connector.

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
E21-13 (TC) - A10-27 (TC)	Always	Below 1 Ω
E21-13 (TC) - Body ground	Always	10 kΩ or higher

Fig 2: Identifying DLC3 And ECM Connectors

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

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
E21-4 (CG) - Body ground	Always	Below 1 Ω

Fig 3: Identifying CG Of E21 DLC3 Connector

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

CHECK ECM (TC of DLC3 INPUT)

Turn the engine switch off.
Reconnect the ECM connector.
Using SST, connect terminals TC and CG of the DLC3.
Turn the engine switch on (IG).

Check that the check engine warning light is blinking.

Fig 4: Identifying Terminal CG And TC Of DLC3

Result

RESULT REFERENCE

Condition	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