Diagnosis System

Total OBD & ECU Auto Diagnostics

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a. Inspect the battery voltage.

Battery voltage: 11 to 14 V

If voltage is below 11 V, recharge the battery before proceeding.

b. Check the DLC3.

The body ECU uses ISO 9141-2 for communication. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 9141-2 format.

Verify the conditions listed in BODY ECU COMMUNICATION CONDITION CHART

Abs Light Reset 2007 Lexus Rx400h

Fig. 15: Checking DLC3

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. BODY ECU COMMUNICATION CONDITION CHART

Fig. 15: Checking DLC3

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. BODY ECU COMMUNICATION CONDITION CHART

Symbols (Terminals No.)

Terminal Description

Condition

Specified Condition

SIL(7) - SG(5)

Bus "+" line

During communication

Pulse generation

SG(5) - Body ground

Signal ground

Always

Below 1

BAT(16) - Body ground

Battery positive

Always

11 to 14 V

2006 ACCESSORIES & EQUIPMENT Door Lock - Sequoia

If the intelligent tester display shows UNABLE TO CONNECT TO VEHICLE when the cable of the intelligent tester is connected to the DLC3, the ignition switch is turned to the ON position and the tester is operated, there is a problem on either the vehicle side or the tester side.

• If communication is normal when the tester is connected to another vehicle, inspect the DLC3 on the original vehicle.

• If communication is still not possible when the tool is connected to another vehicle, the problem is probably in the tester itself, so consult the Service Department listed in the tester's instruction manual.

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