Power Tilt And Power Telescopic Steering Column System Diagnosis System

Steering. Lexus Is250, Is220D. Gse20 Ale20
Steering Column. Lexus Is250, Is220D. Gse20 Ale20

  1. DESCRIPTION

  1. DLC3 CHECK

Power Tilt And Power Telescopic Steering Column System -- Diagnosis System



DESCRIPTION

  1. When troubleshooting a vehicle with the diagnostic system, the only difference from the usual troubleshooting procedure is connecting the intelligent tester to the vehicle and reading various data output from the vehicle's multiplex tilt & telescopic ECU.
    The multiplex tilt & telescopic ECU records DTCs when the ECU detects a malfunction in the computer itself or in its circuits.
    To check the DTCs, connect the intelligent tester to the DLC3 on the vehicle. The intelligent tester enables you to erase the DTCs, activate several actuators, and check the freeze frame data and various forms of steering data.


DLC3 CHECK


    Lexus Is250, Is220D. Gse20 Ale20.Steering Column.Steering System.Power Tilt And Power Telescopic Steering Column System Diagnosis System

  1. Check the DLC3.

    1. The multiplex tilt & telescopic ECU uses CAN and ISO 15765-04 for its communication protocol. The terminal arrangement of the DLC3 complies with ISO 15031-03 and matches the ISO 15765-04 format.

      Symbols (Terminal No.)
      		Terminal Description
      		Condition
      		Specified Condition
      SIL (7) - SG (5)
      		Bus "+" line
      		During communication
      		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)
      		HIGH-level CAN bus line
      		Engine switch off
      		54 to 67 Ω
      CANH (6) - Battery positive
      		HIGH-level CAN bus line
      		Engine switch off
      		1 MΩ or higher
      CANH (6) - CG (4)
      		HIGH-level CAN bus line
      		Engine switch off
      		3 kΩ or higher
      CANL (14) - Battery positive
      		LOW-level CAN bus line
      		Engine switch off
      		1 MΩ or higher
      CANL (14) - CG (4)
      		LOW-level CAN bus line
      		Engine switch off
      		3 kΩ or higher
      HINT:
      If the display shows a communication error message after connecting the intelligent testercable to the DLC3 and turning the engine switch on (IG), there is a problem either with the vehicle or the tester.
      1. If communication is normal when connecting the tester to another vehicle, inspect the DLC3 on the original vehicle.
      2. If communication is still not possible when connecting the tester to another vehicle, the problem is probably in the tester itself. Consult the Service Department listed in the tester's operator's manual.