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HOMESERVICE MANUALSLEXUS2007ES 350REPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESCAN COMMUNICATIONCAN COMMUNICATION SYSTEMDTC B1213 TILT AND TELESCOPIC ECU COMMUNICATION STOPINSPECTION PROCEDURE
2007 Lexus ES 350

Inspection Procedure

2007 Lexus ES 350SECTION Inspection Procedure
NOTE:
  • Turn the engine switch off before measuring the resistances of CAN bus main wires and CAN bus branch wires.
  • After the engine switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.
  • 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. If any doors need to be opened in order to check connectors, open the doors and leave them open.

HINT:

Operating the engine switch, any switches, or any doors triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.

  1. CHECK DTC 
    1. Check for DTCs.

      HINT:

      If CAN MS bus communication error DTC B2326 is output, troubleshoot for B2326 and check for malfunctions in the CAN MS main bus circuit (See DTC B2326 CAN MS Bus Line Communication Malfunction  ).

      Result 

      RESULT REFERENCE

      Result Proceed to
      B2326 is not output A
      B2326 is output B

    B: GO TO DTC CHART (See  DIAGNOSTIC TROUBLE CODE CHART   ) 

    A: Go to Next Step 

  2. CHECK CAN MS BUS WIRE (MULTIPLEX TILT AND TELESCOPIC ECU) 
    1. Turn the engine switch off.
    2. Disconnect connector E79 from the multiplex tilt and telescopic ECU.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Value
      E79-5 (CANH) - E79-14 (CANL) Engine switch OFF 54 to 69 Ω
    Fig 1: Identifying Multiplex Tilt And Telescopic ECU Connector Terminals
    G05254872Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE CAN MS BUS BRANCH WIRE OR CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU) 

    OK: Go to Next Step 

  3. CHECK HARNESS AND CONNECTOR (IG, GND) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Value
      E79-11 (GND) - Body ground Always Below 1 Ω
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Value
      E79-8 (IG) - Body ground Engine switch on (IG) 10 to 14 V
    Fig 2: Identifying Multiplex Tilt And Telescopic ECU Connector Terminals
    G05254873Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE  MULTIPLEX TILT AND TELESCOPIC ECU

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.