Diagnosis System

Total OBD & ECU Auto Diagnostics

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1. DESCRIPTION

(a) Meter and gauge system data and the Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use an intelligent tester with the CAN VIM to check for malfunctions and perform troubleshooting.

2. CHECK DLC3

(a) The ECU uses ISO 15765-4 for communication. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format.

T H100769E16

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 Q

SG (5) - Body ground

Signal ground

Always

Below 1 Q

BAT (16) - Body ground

Battery positive

Always

11 to 14 V

CANH (6) - CANL (14)

CAN bus line

Ignition switch OFF*

54 to 69 Q

CANH (6) - CG (4)

HIGH-level CAN bus line

Ignition switch OFF*

200 Q or higher

CANL (14) - CG (4)

LOW-level CAN bus line

Ignition switch OFF*

200 Q or higher

CANH (6) - CG (4)

HIGH-level CAN bus line

Ignition switch OFF*

6 kQ or higher

CANL (14) - CG (4)

LOW-level CAN bus line

Ignition switch OFF*

6 kQ or higher

Subaru Speed Sensor Gear Replacement

NOTICE:

*: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the 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 CAN VIM, connect the CAN VIM 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 is probably in the tester itself. Consult the Service Department listed in the tester's instruction manual.

Intelligent Tester

Intelligent Tester

Comprobador Manual Dlc3
Intelligent Tester
B142272E01

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