Inspection Procedure

NOTE: When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration (see INITIALIZATION ).

CHECK SKID CONTROL ECU (BS1, BS2 VOLTAGE)

Measure the voltage of the connectors.

HINT:

Measure the voltage from behind the connector with the connector connected to the skid control ECU.

Fig 1: Checking Wire Harness (Skid Control ECU - Body Ground)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Voltage Specifications

Tester Connection	Specified Condition
S7-3 (BS1) - Body ground	10 to 14 V
S10-7 (BS2) - Body ground	10 to 14 V

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: Go to next step

PERFORM ACTIVE TEST BY TECHSTREAM (BRAKE CONTROL WARNING LIGHT)

Select the ACTIVE TEST, generate a control command, and then check that the brake control warning light operates.

ABS / VSC / TRAC:

SKID CONTROL ECU DIAGNOSTIC CHART

Item

Test Details

Diagnostic Note

ECB⁽¹⁾ INDI LIGHT

Turns Brake Control warning light ON / OFF

Observe combination meter

⁽¹⁾	Electronically Controlled Brake

OK:

The brake control warning light turns on or off.

NG: REPAIR OR REPLACE COMBINATION METER

OK: REPLACE SKID CONTROL ECU