Diagnosis System

WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

DESCRIPTION
1. Data of the system can be read in the Data Link Connector 3 (DLC3) of the vehicle. Therefore, when the system seems to be malfunctioning, use the intelligent tester to check for a malfunction and repair it.
  
  Fig 1: Connecting Intelligent Tester (With CAN VIM) To DLC3
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK DLC3

The vehicle uses the ISO 15765-4 for communication protocol. The terminal arrangement of the DLC3 complies with ISO 15031-03 and matches the ISO 15765-4 format.

Fig 2: Identifying DLC3 Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TERMINAL DESCRIPTION AND SPECIFIED CONDITION

Symbols (Terminal No.)

Terminal Description

Condition

Specified Condition

SIL (7) - SG (5)

Bus "+" line

During transmission

Pulse generation

CG (4) - Body ground

Chassis ground

Always

Below 1

SG (5) - Body ground

Signal ground

Always

Below 1

BAT (16) - Body ground

Battery positive

Always

11 to 14 V

CANH (6) - CANL (14)

HIGH-level CAN bus line

Ignition switch OFF⁽¹⁾

54 to 69

CANH (6) - Battery positive

IGH-level CAN bus line

Ignition switch OFF⁽¹⁾

1 M or higher

CANH (6) - CG (4)

HIGH-level CAN bus line

Ignition switch OFF⁽¹⁾

200 or higher

CANL (14) - Battery positive

LOW-level CAN bus line

Ignition switch OFF⁽¹⁾

1 M or higher

CANL (14) - CG (4)

LOW-level CAN bus line

Ignition switch OFF⁽¹⁾

200 or higher

⁽¹⁾	Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, other switches or doors.

If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector.

HINT:

Connect the cable of the intelligent tester to the DLC3, turn the ignition switch ON and attempt to use the tester. If the display indicates that a communication error has occurred, there is a problem either with the vehicle or with the tester.

If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle.
If communication is still not possible when the tester is connected to another vehicle, the problem may be in the tester itself. Consult the Service Department listed in the tester's instruction manual.