Inspection Procedure

HINT:

Start the inspection from step 1 when using the intelligent tester and start from step 2 when not using the intelligent tester.

PERFORM ACTIVE TEST BY INTELLIGENT TESTER (TRAC OFF INDICATOR LIGHT)

Connect the intelligent tester to the DLC3.
Start the engine.

Select the item "TRAC OFF LIGHT" in the ACTIVE TEST and operate the TRAC OFF indicator light on the intelligent tester.

ACTIVE TEST REFERENCE CHART

Item	Vehicle Condition / Test Details	Diagnostic Note
VSC / TRAC OFF IND	Turns VSC / TRAC OFF indicator ON / OFF	Observe combination meter

Check that "ON" and "OFF" of the TRAC OFF indicator light are indicated on the combination meter when using the intelligent tester.
OK:

Turn the TRAC OFF indicator light on or off in accordance with the intelligent tester.

NG: Go to step 4

OK: Go to next step

INSPECT TRACTION CONTROL SWITCH

Remove the TRAC control switch.
Disconnect the TRAC control switch connector.
Measure the resistance according to the value(s) in the table below.

Resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Switch Condition	Specified Condition
T6-2 (+) - T6-1 (E)	Pushed in (ON)	Below 1 Ω
T6-2 (+) - T6-1 (E)	Released (OFF)	10 kΩ or higher

Fig 1: Identifying TRAC Control Switch Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE TRACTION CONTROL SWITCH

OK: Go to next step

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - TRAC OFF SWITCH)

Disconnect the skid control ECU connector and the TRAC control switch connector.
Measure the resistance according to the value(s) in the table below.

Resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
S1-43 (CSW) - T6-2 (+)	Below 1 Ω
S1-43 (CSW) - Body ground	10 kΩ or higher
T6-1 (E) - Body ground	Below 1 Ω

Fig 2: Identifying Skid Control ECU Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK HARNESS AND CONNECTOR (ECM - SKID CONTROL ECU)

Disconnect the skid control ECU connector S1 and ECM connector E5.

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

Resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
S1-8 (TRC+) - E5-25 (TRC+)	Below 1 Ω
S1-22 (TRC-) - E5-31 (TRC-)	Below 1 Ω
S1-9 (ENG+) - E5-24 (ENG+)	Below 1 Ω
S1-23 (ENG-) - E5-30 (ENG-)	Below 1 Ω

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

Resistance

TESTER CONNECTION AND SPECIFIED CONDITION

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 3: Disconnecting Skid Control ECU Connector S1 And ECM Connector E5

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT COMBINATION METER ASSEMBLY

Check if the indicators (fuel, turn signal) other than TRAC OFF indicator operate normally.

Result

RESULT REFERENCE CHART

Result	Proceed to
Indicators OK	A
Indicators NG	B

B: CHECK COMBINATION METER ASSEMBLY (COMBINATION METER POWER SOURCE CIRCUIT)

A: REPAIR OR REPLACE COMBINATION METER ASSEMBLY