ACTIVE TORQUE CONTROL 4WD SYSTEM DIAGNOSIS SYSTEM


  1. DESCRIPTION

    Active torque control 4WD system data can be read in the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the GTS to check for malfunctions and perform repairs. Therefore when there seems to be a problem with the active torque control 4WD system, use the GTS or SST to check and troubleshoot it.

  2. CHECK DLC3


    1. A01EKCIE16

      The ECU uses CAN (ISO11898-1) and ISO9141-2 for communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO9141-2 format.

      Verify the conditions listed in the table below.

      Symbol (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
      CANH (6) - CANL (14) CAN bus line Ignition switch off* 54 to 69 Ω
      CANH (6) - CG (4) HIGH-level CAN bus line Ignition switch off* 200 Ω or higher
      CANL (14) - CG (4) LOW-level CAN bus line Ignition switch off* 200 Ω or higher
      CANH (6) - BAT (16) HIGH-level CAN bus line Ignition switch off* 6 kΩ or higher
      CANL (14) - BAT (16) LOW-level CAN bus line Ignition switch off* 6 kΩ or higher

      Note

      *: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, 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.

      Tech Tips

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


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

      • If communication is still not possible when the GTS is connected to another vehicle, the problem may be in the GTS itself. Consult the Service Department listed in the GTS instruction manual.

  3. WARNING LIGHT


    1. A01EK6ME02

      When a problem occurs in the active torque control 4WD system, the AWD warning light on the combination meter comes on to inform the driver of the problem.