Diagnosis System

DIAGNOSIS SYSTEM

1. DESCRIPTION




a. VSC system data can be read through the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the intelligent tester to check for malfunctions and perform repairs.
b. If the skid control ECU detects a malfunction, the ABS and BRAKE warning lights, and SLIP and VSC OFF indicator lights will turn on to warn the driver.
c. DTCs can be read by connecting the intelligent tester to the DLC3, or connecting SST between terminals 13 (TC) and 4 (CG) of the DLC3.

SST 09843-18040

d. Several DTCs can be stored in memory at one time.




e. This system has a sensor signal check function (Test Mode).

2. CHECK DLC3







a. The ECM uses ISO 15765-4 for communication. The terminal arrangement of the DLC3 complies with ISO 15031-3 and matches the ISO 15765-4 format.

NOTE: *: 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 (with 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 on 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.