Inspection Procedure

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

INSPECT DLC3 TERMINAL VOLTAGE (TC TERMINAL)

Turn the ignition switch to the ON position.

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

Standard:

TESTER CONNECTION SPECIFIED CONDITION (1 OF 8)

Tester Connection	Specified Condition
D3-13 (TC) - D3-4 (CG)	10 to 14 V

Fig 1: Inspecting DLC3 Terminal Voltage (TC Terminal)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 3

OK: Go to Next Step.

CHECK HARNESS AND CONNECTOR (ECM - SKID CONTROL ECU)

1MZ, 3MZ:

Disconnect the skid control ECU connector S1 and ECM connector E6.

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

Standard:

TESTER CONNECTION SPECIFIED CONDITION (2 OF 8)

Tester Connection	Specified Condition
S1-8 (TRC+) - E6-25 (TRC+)	Below 1 Ω
S1-22 (TRC-) - E6-31 (TRC-)	Below 1 Ω
S1-9 (ENG+) - E6-24 (ENG+)	Below 1 Ω
S1-23 (ENG-) - E6-30 (ENG-)	Below 1 Ω

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

Standard:

TESTER CONNECTION SPECIFIED CONDITION (3 OF 8)

Tester Connection	Specified Condition
S1-8 (TRC+) - Body ground	10 kΩ or higher
S1-22 (TRC-) - Body ground	10 kΩ or higher
S1-9 (ENG+) - Body ground	10 kΩ or higher
S1-23 (ENG-) - Body ground	10 kΩ or higher

Fig 2: Checking Harness And Connector (ECM - Skid Control ECU)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

2AZ:

Check CAN communication system (see DIAGNOSTIC TROUBLE CODE CHART ).
OK:CAN communication system is normal.

NG: CHECK CAN COMMUNICATION SYSTEM (SEE DIAGNOSTIC TROUBLE CODE CHART )

OK: Go to Next Step.

REPLACE BRAKE ACTUATOR ASSY (SEE REPLACEMENT )

CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND)

Measure the resistance according to the value in the table below.

Standard:

TESTER CONNECTION SPECIFIED CONDITION (4 OF 8)

Tester Connection	Specified Condition
D3-4 (CG) - Body ground	Below 1 Ω

Fig 3: Checking Harness And Connector (DLC3 - Body Ground)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step.

CHECK HARNESS AND CONNECTOR (ECM - DLC3)

Disconnect the ECM connector.

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

Standard:

TESTER CONNECTION SPECIFIED CONDITION (5 OF 8)

Tester Connection	Specified Condition
(1MZ,3MZ) E6-20 (TC) - D3-13 (TC)	Below 1 Ω
(2AZ) E7-17 (TC) - D3-13 (TC)	Below 1 Ω

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

Standard:

TESTER CONNECTION SPECIFIED CONDITION (6 OF 8)

Tester Connection	Specified Condition
D3-13 (TC) - Body ground	10 kΩ or higher

Fig 4: Checking Harness And Connector (ECM - DLC3)

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step.

CHECK HARNESS AND CONNECTOR (ECM - SKID CONTROL ECU)

1MZ, 3MZ:

Disconnect the skid control ECU connector S1 and ECM connector E6.

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

Standard:

TESTER CONNECTION SPECIFIED CONDITION (7 OF 8)

Tester Connection	Specified Condition
S1-8 (TRC+) - E6-25 (TRC+)	Below 1 Ω
S1-22 (TRC-) - E6-31 (TRC-)	Below 1 Ω
S1-9 (ENG+) - E6-24 (ENG+)	Below 1 Ω
S1-23 (ENG-) - E6-30 (ENG-)	Below 1 Ω

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

Standard:

TESTER CONNECTION SPECIFIED CONDITION (8 OF 8)

Tester Connection	Specified Condition
S1-8 (TRC+) - Body ground	10 kΩ or higher
S1-22 (TRC-) - Body ground	10 kΩ or higher
S1-9 (ENG+) - Body ground	10 kΩ or higher
S1-23 (ENG-) - Body ground	10 kΩ or higher

Fig 5: Checking Harness And Connector (ECM - Skid Control ECU)

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

2AZ:

Check CAN communication system (see DIAGNOSTIC TROUBLE CODE CHART ).
OK:CAN communication system is normal.

NG: CHECK CAN COMMUNICATION SYSTEM (SEE DIAGNOSTIC TROUBLE CODE CHART )

OK: REPLACE BRAKE ACTUATOR ASSY (SEE REPLACEMENT )