ANTI-LOCK BRAKE SYSTEM > DIAGNOSIS SYSTEM

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DESCRIPTION

  1. The Anti-lock Brake System (ABS) data can be read in 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.



    2. C108846E02

  2. If the skid control ECU detects a malfunction, the ABS warning light will illuminate to warn the driver.

  3. DTCs can be read by connecting the intelligent tester to the DLC3, or connecting SST between the 13 (TC) and 4 (CG) terminals of the DLC3.

    SST
    09843-18040  

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

  5. The ABS has a sensor signal check function (TEST MODE).


CHECK DLC3
The vehicle's ECM uses ISO 14230 (M-OBD) communication protocol. The terminal arrangement of the DLC3 complies with ISO 15031-03 and matches the ISO 14230 format.
C108847E03

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 Ω
SG (5) - Body ground
Signal ground
Always
Below 1 Ω
BAT (16) - Body ground
Battery positive
Always
10 to 14 V
  1. If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector.

HINT:
C108852E01
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.
  1. If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle.
  2. 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.