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Home >> Lexus >> 2021 >> LS 500h AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge System - Diagnostic Codes (1 Of 3) >> Meter / Gauge System >> DTC B1321-87: Lost Communication with EMV Missing Message; DTC B1326-87: Lost Communication with Clock Device (Local-CAN) Missing Message [10/2023 - ] >> Procedure

DTC B1321-87: Lost Communication with EMV Missing Message; DTC B1326-87: Lost Communication with Clock Device (Local-CAN) Missing Message [10/2023 - ]: Procedure

  1. CHECK FOR DTC 
    1. Check if meter/gauge system DTCs are output.

      Body Electrical > Combination Meter > Trouble Codes 

    2. Check if audio and visual system DTCs are output.

      Body Electrical > Navigation System > Trouble Codes 

    3. Check for DTCs and output pattern according to the following table.
      Pattern DTC Output Part Name
      (Display on GTS)
      Combination Meter Navigation System
      B1321-87 B1326-87 U11D0-87 U11D2-87
      Pattern 1 ◦ ◦ ◦ ◦
      Pattern 2 ◦ ◦ ◦ -
      Pattern 3 ◦ - ◦ ◦
      Pattern 4 - ◦ - ◦

      ◦: DTC is output.-: DTC is not output

      Result

      Result Proceed to
      Pattern 1 is output A
      Pattern 2 is output B
      Pattern 3 is output C
      Pattern 4 is output D

    Result: 

    B 

    See step  5

    Result: 

    C 

    REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

    Result: 

    D 

    See step  6

    Result: 

    A 

    See step  2

  2. CHECK FOR CLOCK ASSEMBLY 
    1. Disconnect the G167 clock assembly connector.
    2. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [10/2017 - ]

      Body Electrical > Combination Meter > Clear DTCs 

    3. Check for DTCs.

      Refer to DTC CHECK / CLEAR [10/2017 - ]

      Body Electrical > Combination Meter > Trouble Codes 

      Result

      Result Proceed to
      DTC B1321-87 is output. A
      DTC B1321-87 is not output. B

    Result: 

    B 

    REPLACE CLOCK ASSEMBLY. Refer to  REMOVAL [10/2020 - ] 

    Result: 

    A 

    See step  3

  3. CHECK CAN WIRE 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G161-32 (TX+) - G161-15 (TX-) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      G161-32 (TX+) - G112-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G161-15 (TX-) - G112-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G161-32 (TX+) - G112-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G161-15 (TX-) - G112-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [10/2023 - ] 

    Result: 

    NG 

    See step  4

  4. CHECK CAN WIRE 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the radio receiver assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G186-11 (CNH1) - G186-12 (CNL1) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      G186-11 (CNH1) - G112-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G186-12 (CNL1) - G112-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G186-11 (CNH1) - G112-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G186-12 (CNL1) - G112-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR 

  5. CHECK CAN WIRE 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G34-8 (TX+) - G34-7 (TX-) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [10/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR 

  6. CHECK CAN WIRE 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the clock assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G167-4 (TX+1) - G167-5 (TX-1) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CLOCK ASSEMBLY. Refer to  REMOVAL [10/2020 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR 

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