Steering Lock System Diagnosis System

Steering. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
Steering Column. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

  1. DESCRIPTION

  1. CHECK DLC3

Steering Lock System -- Diagnosis System



DESCRIPTION

  1. When troubleshooting a vehicle with a diagnosis system, connect the intelligent tester to the DLC3 of the vehicle and read various data output from the steering lock ECU.
    The steering lock ECU records DTCs when the computer detects a malfunction in the computer itself or in its circuits.

  2. The diagnosis information of the steering lock ECU is transmitted to the tester via the certification ECU as the steering lock ECU is not connected to the CAN communication system.

  3. The steering lock ECU does not store DTCs regarding past problems.

    HINT:
    When the engine switch is off, the main body ECU to which the intelligent tester is to be connected may not be working.
    Communication with the intelligent tester is impossible if the main body ECU is not working.

  4. As the computer's memory data will be deleted, do not remove the fuses or disconnect the battery terminals until the DTCs are checked and noted.

  5. Malfunctions related to systems other than the steering lock ECU's system may cause DTCs to be output. Note DTCs related to other systems.


CHECK DLC3


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Steering Column.Steering System.Steering Lock System Diagnosis System

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

    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
    		11 to 14 V
    CANH (6) - CANL (14)
    		CAN bus line
    		Engine switch off*
    		54 to 69 Ω
    CANH (6) - CG (4)
    		HIGH-level CAN bus line
    		Engine switch off*
    		200 Ω or higher
    CANL (14) - CG (4)
    		LOW-level CAN bus line
    		Engine switch off*
    		200 Ω or higher
    CANH (6) - BAT (16)
    		HIGH-level CAN bus line
    		Engine switch off*
    		6 kΩ or higher
    CANL (14) - BAT (16)
    		LOW-level CAN bus line
    		Engine switch off*
    		6 kΩ or higher
    NOTICE:
    *: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the engine switch, any other switches or the doors.
    1. 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 engine switch on (IG) 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.