Inspection Procedure

NOTE: When replacing the skid control ECU, perform zero point calibration and store system information (See CALIBRATION ).

CHECK CAN COMMUNICATION SYSTEM

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

Result

RESULT REFERENCE

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

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

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

Tester Connection	Switch Condition	Specified Condition
J21-13 (TC) - J21-4 (CG)	Engine switch on (IG)	11 to 14 V

Fig 1: Identifying DLC3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Result

RESULT REFERENCE

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 engine switch off.
Disconnect the ECM connector.

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

Standard Resistance

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
J21-13 (TC) - A6-21 (TC)	Always	Below 1 Ω
J21-13 (TC) - Body ground	Always	10 kΩ or higher

Fig 2: Identifying Harness And Connector (TC Of DLC3 - ECM)

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

Tester Connection	Condition	Specified Condition
J21-4 (CG) - Body ground	Always	Below 1 Ω

Fig 3: Identifying Harness And Connector (CG Of DLC3 - Body Ground)

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.
SST 09843-18040
Turn the engine switch on (IG).

Check that the check engine warning light is blinking.

Fig 4: Identifying ECM (TC Of DLC3 Input)

Result

RESULT REFERENCE

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 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 SKID CONTROL ECU (See REMOVAL )