Inspection Procedure

NOTE:

When replacing the skid control ECU, perform initialization of linear solenoid valve calibration (see INITIALIZATION ).
If the ECM has been replaced, it is necessary to register the ECU (see REGISTRATION ).

INSPECT DLC3 (TC AND CG TERMINAL)

Fig 1: Identifying DLC3 Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Turn the engine switch on (IG).

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

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

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
K16-4 (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 (See HOW TO PROCEED WITH TROUBLESHOOTING )

A: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (DLC3 - ECM)

Fig 2: Identifying A13 ECU Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the A13 ECU connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
L31-13 (TC)-A13-21 (TC)	Always	Below 1 Ω
L31-13 (TC)-Body ground	Always	10 kΩ or higher

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.

Fig 3: Identifying DLC3 Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

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

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP

CHECK ECM (DLC3 INPUT)

Fig 4: Identifying DLC3 Connector Terminal

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

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 ECM (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 (See HOW TO PROCEED WITH TROUBLESHOOTING )

A: GO TO NEXT STEP

REPLACE SKID CONTROL ECU (See REMOVAL )