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Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: 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.
  1. CHECK DLC3 
    1. Turn the engine switch off.
    2. Measure the resistance according to the value(s) in the table below.

      Result 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Value Result
      E21-6 (CANH) - E21-14 (CANL) Engine switch off 108 to 132 Ω A
      E21-6 (CANH) - E21-14 (CANL) Engine switch off 132 Ω or higher B
      Fig 1: Identifying DLC3 Connector Terminals
      G05254978Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE: When the measured value is 132 Ω, or higher and a CAN communication system diagnostic trouble code is output, there may be a fault besides disconnection of the DLC3 branch wire. For that reason, troubleshooting should be performed again from "HOW TO PROCEED WITH TROUBLESHOOTING " after repairing the trouble area.

    B: REPAIR OR REPLACE DLC3 BRANCH WIRE OR CONNECTOR 

    A: Go to Next Step 

  2. CHECK FOR OPEN IN CAN NO. 1 BUS MAIN WIRE (COMBINATION METER MAIN BUS WIRE) 
    1. Disconnect CAN main bus wire connector E48 from the CAN No. 2 J/C "B" side (without earth terminal).
      NOTE:
      • Before disconnecting the connector, make a note of where it is connected.
      • Reconnect the connector to its original position.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Value
      E48-1 (CANH) - E48-2 (CANL) Engine switch off 108 to 132 Ω
    Fig 2: Identifying CAN Main Bus Wire Connector Terminals
    G05254983Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: Go to step  7

    OK: Go to Next Step 

  3. CHECK FOR OPEN IN CAN NO. 1 BUS MAIN WIRE (CAN NO. 2 J/C) 
    1. Reconnect CAN main bus wire connector E48 to the CAN No. 2 J/C "B" side (without earth terminal).
    2. Disconnect CAN main bus wire connector E42 from the CAN No. 2 J/C "A" side (without earth terminal).
      NOTE:
      • Before disconnecting the connector, make a note of where it is connected.
      • Reconnect the connector to its original position.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Value
      E42-1 (CANH) - E42-2 (CANL) Engine switch off 108 to 132 Ω
    Fig 3: Identifying CAN Main Bus Wire Connector Terminals
    G05254984Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE CAN NO. 2 J/C 

    NG: Go to Next Step 

  4. CHECK FOR OPEN IN CAN NO. 1 BUS MAIN WIRE CAN NO. 2 J/C - CAN NO. 5 J/C) 
    1. Reconnect CAN main bus wire connector E42 to the CAN No. 2 J/C "A" side (without earth terminal).
    2. Disconnect CAN main bus wire connector E34 from the CAN No. 5 J/C (rear side of the vehicle).
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Value
      E34-4 (CANH) - E34-10 (CANL) Engine switch off 108 to 132 Ω
    Fig 4: Disconnecting CAN Main Bus Wire Connector E34
    G05254985Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE CAN NO. 1 BUS MAIN WIRE OR CONNECTOR (CAN NO. 2 J/C - CAN NO. 5 J/C) 

    OK: Go to Next Step 

  5. CHECK FOR OPEN IN CAN NO. 1 BUS MAIN WIRE (CAN NO. 5 J/C) 
    1. Reconnect CAN main bus wire connector E34 to the CAN No. 5 J/C (rear side of the vehicle).
    2. Disconnect CAN main bus wire connector A26 from the CAN No. 5 J/C (front side of the vehicle).
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Value
      A26-1 (CANH) - A26-7 (CANL) Engine switch off 108 to 132 Ω
    Fig 5: Disconnecting CAN Main Bus Wire Connector A26
    G05254986Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE CAN NO. 5 J/C 

    NG: Go to Next Step 

  6. CHECK FOR OPEN IN CAN NO. 1 BUS MAIN WIRE (ECM CAN MAIN BUS LINE) 
    1. Reconnect CAN main bus wire connector A26 to the CAN No. 5 J/C (front side of the vehicle).
    2. Disconnect the ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Value
      A10-41 (CANH) - A10-49 (CANL) Engine switch off 108 to 132 Ω
    Fig 6: Identifying ECM Connector Terminals
    G05254987Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE ECM  (See ECM )

    NG: REPAIR OR REPLACE CAN NO. 1 BUS MAIN WIRE OR CONNECTOR (CAN NO. 5 J/C - ECM) 

  7. CHECK FOR OPEN IN CAN NO. 1 BUS MAIN WIRE (COMBINATION METER - CAN NO. 2 J/C) 
    1. Reconnect CAN main bus wire connector E48 to the CAN No. 2 J/C B side (without earth terminal).
    2. Disconnect combination meter connector E19.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Value
      E19-17 (CANH) - E19-18 (CANL) Engine switch off 108 to 132 Ω
    Fig 7: Disconnecting Combination Meter Connector E19
    G05254966Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE COMBINATION METER  (See COMBINATION METER )

    NG: REPAIR OR REPLACE CAN NO. 1 BUS MAIN WIRE OR CONNECTOR (CAN NO. 2 J/C COMBINATION METER) 

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