When replacing the skid control ECU perform the zero point calibration See Precheck

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2004 BRAKES ABS With EBD & BA & TRAC & VSC System - Diagnostics - Sequoia

OK: Replace brake booster ( VACUUM BRAKE BOOSTER ). DTC 42: ECU COMMUNICATION SYSTEM MALFUNCTION CIRCUIT DESCRIPTION

This circuit is used to send TRAC & VSC control information from skid control ECU to the translate ECU (VSC+, VSC-) and engine control information and steering angle information from translate ECU to skid control ECU.

DTC No

DTC Detecting Condition

Trouble Area

42

131 voltage is 0.5 V or more, and the condition that data front ECU cannot be received continues for 5 sec. or more.

• VSO or VSC- circuit ■Translate ECU

Fig. 92: DTC 42 Detecting Condition Trouble Area Table Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

WIRING DIAGRAM

Toyota Hilux Wiring Diagram
Fig. 93: Wiring Diagram - ECU Communication System Malfunction Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. Check for open and short circuit in harness and connector between each of terminals VSC+ and VSC- of translate ECU and skid control ECU (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).

NG: Repair or replace harness or connector.

2004 BRAKES ABS With EBD & BA & TRAC & VSC System - Diagnostics - Sequoia

OK: Go to next step.

2. Check voltage between terminal IG1 and body ground of translate ECU and skid control ECU (See TERMINALS OF ECU ).

NG: Repair or replace harness or connector.

OK: Go to next step.

3. Check for open circuit in harness and connector between terminal GND of translate ECU and ECM and body ground (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).

NG: Repair or replace harness or connector. Tighten the ground bolt. OK: Go to next step.

4. Replace the translate ECU and check whether or not the trouble occurs again.

YES: Check and replace skid control ECU.

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  • marcus
    How to calibrate toyota after steering replacement?
    7 years ago

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