Inspection Procedure

NOTE:

When replacing the skid control ECU, perform the following operations:
- Initialization of linear solenoid valve and calibration (see INITIALIZATION ).
- Yaw rate and acceleration sensor zero point calibration (see CALIBRATION ).
If the hybrid vehicle control ECU has been replaced, it is necessary to register the Vehicle Identification Number (VIN) into the ECU (see CHECK FOR INTERMITTENT PROBLEMS ).

INSPECT DLC3 (TC AND CG TERMINAL)

Turn the power switch ON (IG)

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

Standard voltage

VOLTAGE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
L31-13 (TC) - Body ground	Power switch ON (IG)	11 to 14 V

Fig 1: Identifying TC And CG DLC3 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
L31-4 (CG) - Body ground	Always	Below 1 Ω

NG: Go to step 3

OK: Go to next step

CHECK CAN COMMUNICATION SYSTEM

Check if the CAN communication DTC is output (See DIAGNOSTIC TROUBLE CODE CHART ).

Result

RESULT REFERENCE

Result	Proceed to
DTC is not output	A
DTC is output	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: GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (See HOW TO PROCEED WITH TROUBLESHOOTING ).

A: Go to next step

CHECK HARNESS AND CONNECTOR (DLC3 - HYBRID VEHICLE CONTROL ECU)

Disconnect the A75 ECU connector.

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

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
L31-13 (TC) - A75-24 (TC)	Always	Below 1 Ω
L31-13 (TC) - Body ground	Always	10 kΩ or higher

Fig 2: Identifying DLC3 L31 And A75 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND)

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

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
L31-4 (CG) - Body ground	Always	Below 1 Ω

Fig 3: Identifying CG DLC3 Connector Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK HYBRID VEHICLE CONTROL ECU (DLC3 INPUT)

Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
SST 09843-18040

Fig 4: Identifying TC And CG DLC3 Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check if the ABS warning light is blinking.

Result

RESULT REFERENCE

Result	Proceed to
ABS warning light is blinking	A
ABS warning light is not blinking	B

B: REPLACE HYBRID VEHICLE CONTROL ECU (See REMOVAL )

A: Go to next step

CHECK CAN COMMUNICATION SYSTEM

Check if the CAN communication DTC is output (See DIAGNOSTIC TROUBLE CODE CHART ).

Result

RESULT REFERENCE

Result	Proceed to
DTC is not output	A
DTC is output	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: GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (See HOW TO PROCEED WITH TROUBLESHOOTING )

A: REPLACE SKID CONTROL ECU (See REMOVAL )