LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2017 >> IS 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System - Circuit Tests (2 Of 4) >> Can Communication System >> Open in Bus 2 Main Bus Line [10/2016 - 10/2017] >> Procedure

Open in Bus 2 Main Bus Line [10/2016 - 10/2017]: Procedure

  1. CHECK FOR OPEN IN CAN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) BRANCH LINES) 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the K141 central gateway ECU (network gateway ECU) connector.
      GTY678386Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Central Gateway ECU (Network Gateway ECU))
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K141-18 (CA4H) - K141-17 (CA4L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Result
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 

    Result: 

    OK 

    See step  2

  2. CHECK FOR OPEN IN CAN BUS LINES (COMBINATION METER ASSEMBLY) 
    1. Reconnect the K141 central gateway ECU (network gateway ECU) connector.
    2. Disconnect the K3 combination meter assembly connector.
      GTY658695Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Combination Meter Assembly)
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K3-29 (CANH) - K3-30 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Result Proceed to
      OK A
      NG (for 2GR-FSE Engine) B
      NG (for 8AR-FTS Engine) C

    Result: 

    A 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [10/2016 - 09/2020] 

    Result: 

    C 

    See step  4

    Result: 

    B 

    See step  3

  3. CHECK FOR OPEN IN CAN BUS LINES (ECM) 
    1. Reconnect the K3 combination meter assembly connector.
    2. Disconnect the A77 ECM connector.
      GTY639285Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to ECM)
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A77-14 (CANH) - A77-13 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Result
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [04/2013 - 10/2017] 

    Result: 

    NG 

    See step  5

  4. CHECK FOR OPEN IN CAN BUS LINES (ECM) 
    1. Reconnect the K3 combination meter assembly connector.
    2. Disconnect the A91 ECM connector.
      GTY631791Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to ECM)
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A91-13 (CANH) - A91-26 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Result
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [08/2015 - ] 

    Result: 

    NG 

    See step  5

  5. CHECK FOR OPEN IN CAN BUS LINES (NO. 1 CAN JUNCTION CONNECTOR) 
    1. Reconnect the A77*1 or A91*2 ECM connector.
      • *1: for 2GR-FSE Engine
      • *2: for 8AR-FTS Engine
    2. Disconnect the K109 No. 1 CAN junction connector.
      GTY621883Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 1 CAN Junction Connector)
      *b to No. 2 CAN Junction Connector
      *c to Combination Meter Assembly
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      K109-1 (CANH) - K109-11 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 2 CAN junction connector
      K109-2 (CANH) - K109-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Combination meter assembly

      Result

      Result Proceed to
      OK A
      NG (Line to No. 2 CAN junction connector) B
      NG (Line to combination meter assembly) C

    Result: 

    A 

    REPLACE NO. 1 CAN JUNCTION CONNECTOR 

    Result: 

    C 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (COMBINATION METER ASSEMBLY - NO. 1 CAN JUNCTION CONNECTOR) 

    Result: 

    B 

    See step  6

  6. CHECK FOR OPEN IN CAN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR) 
    1. Reconnect the K109 No. 1 CAN junction connector.
    2. Disconnect the K110 No. 2 CAN junction connector.
      GTY621885Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 2 CAN Junction Connector)
      *b to No. 1 CAN Junction Connector
      *c to ECM
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      K110-1 (CANH) - K110-11 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 1 CAN junction connector
      K110-3 (CANH) - K110-13 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω ECM

      Result

      Result Proceed to
      OK A
      NG (Line to No. 1 CAN junction connector) B
      NG (Line to ECM) C

    Result: 

    A 

    REPLACE NO. 2 CAN JUNCTION CONNECTOR 

    Result: 

    B 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 1 CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION CONNECTOR) 

    Result: 

    C 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (ECM - NO. 2 CAN JUNCTION CONNECTOR) 

scientia non olet · About LEMON Manuals