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Home >> Lexus >> 2024 >> LX 600 Base >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge System - Diagnostic Codes & Symptom Tests >> Meter / Gauge System >> DTC B1321-87: Lost Communication with EMV Missing Message [12/2021 - ] >> Procedure

DTC B1321-87: Lost Communication with EMV Missing Message [12/2021 - ]: Procedure

  1. CHECK VEHICLE TYPE 
    1. Check vehicle condition.

      Result

      Result  Proceed to 
      w/ Headup Display System A
      w/o Headup Display System B

    Result: 

    B 

    See step  9

    Result: 

    A 

    See step  2

  2. 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 if headup display system DTCs are output.

      Body Electrical > Head Up Display > Trouble Codes 

    4. Check for the DTCs and output pattern according to the following table.
      Pattern DTC Output Part Name
      (Display on GTS)
      Combination Meter Navigation System Head up Display
      Pattern 1 B1321-87 U11D0-87 U11D3-87* U11D3-87 B1321-87
      Pattern 2 B1321-87 U11D0-87 - - -
      Pattern 3 B1321-87 - - - -
      Pattern 4 B1321-87 - - - B1321-87

      *: w/ Wireless Charging System, except 4-Passenger

      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  6

    Result: 

    C 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

    Result: 

    D 

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

    Result: 

    A 

    See step  3

  3. CHECK FOR METER MIRROR SUB-ASSEMBLY 

    Pre-procedure1

    • Disconnect the I17 meter mirror sub-assembly connector.
    • Clear the DTCs.

      Body Electrical > Combination Meter > Clear DTCs 

    • Check for DTCs.

      Body Electrical > Combination Meter > Trouble Codes 

      Result

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

    Post-procedure1

    • None

    Result: 

    B 

    REPLACE METER MIRROR SUB-ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

    Result: 

    A 

    See step  4

  4. CHECK VEHICLE TYPE 
    1. Check vehicle condition.

      Result

      Result  Proceed to 
      w/ Wireless Charging System, except 4-Passenger A
      w/o Wireless Charging System or w/ Wireless Charging System, for 4-Passenger B

    Result: 

    B 

    See step  7

    Result: 

    A 

    See step  5

  5. CHECK FOR MOBILE WIRELESS CHARGER CRADLE ASSEMBLY 

    Pre-procedure1

    • Disconnect the I202 mobile wireless charger cradle assembly connector.
    • Clear the DTCs.

      Body Electrical > Combination Meter > Clear DTCs 

    • Check for DTCs.

      Body Electrical > Combination Meter > Trouble Codes 

      Result

      Result Proceed to
      D11D387 is output. A
      D11D387 is not output. B

    Post-procedure1

    • None

    Result: 

    A 

    See step  7

    Result: 

    B 

    REPLACE MOBILE WIRELESS CHARGER CRADLE ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

  6. CHECK CAN WIRE 

    Pre-procedure1

    • Disconnect the cable from the negative (-) battery terminal.
    • Disconnect the I5 combination meter assembly connector.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I5-14 (MSCH) - I5-30 (MSCL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR 

  7. CHECK CAN WIRE 

    Pre-procedure1

    • Disconnect the cable from the negative (-) battery terminal.
    • Disconnect the I5 combination meter assembly connector.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I5-14 (MSCH) - I5-30 (MSCL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      I5-14 (MSCH) - I76-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      I5-30 (MSCL) - I76-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      I5-14 (MSCH) - I76-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      I5-30 (MSCL) - I76-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

    Result: 

    NG 

    See step  8

  8. CHECK CAN WIRE 

    Pre-procedure1

    • Disconnect the cable from the negative (-) battery terminal.
    • Disconnect the I197 multi-media module receiver assembly connector.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I197-11 (CNH1) - I197-12 (CNL1) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      I197-11 (CNH1) - I76-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      I197-12 (CNL1) - I76-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      I197-11 (CNH1) - I76-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      I197-12 (CNL1) - I76-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None

    Result: 

    OK 

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR 

  9. 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 the DTCs and output pattern according to the following table.
      Pattern DTC Output Part Name
      Combination Meter Navigation System
      Pattern 1 B1321-87 U11D0-87 U11D3-87*
      Pattern 2 B1321-87 - -

      *: w/ Wireless Charging System, except 4-Passenger

      Result

      Result Proceed to
      Pattern 1 is output A
      Pattern 2 is output B

    Result: 

    B 

    See step  14

    Result: 

    A 

    See step  10

  10. CHECK VEHICLE TYPE 
    1. Check vehicle condition.

      Result

      Result  Proceed to 
      w/ Wireless Charging System, except 4-Passenger A
      w/o Wireless Charging System or w/ Wireless Charging System, for 4-Passenger B

    Result: 

    B 

    See step  12

    Result: 

    A 

    See step  11

  11. CHECK FOR MOBILE WIRELESS CHARGER CRADLE ASSEMBLY 

    Pre-procedure1

    • Disconnect the I202 mobile wireless charger cradle assembly connector.
    • Clear the DTCs.

      Body Electrical > Combination Meter > Clear DTCs 

    • Check for DTCs.

      Body Electrical > Combination Meter > Trouble Codes 

      Result

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

    Post-procedure1

    • None

    Result: 

    A 

    See step  12

    Result: 

    B 

    REPLACE MOBILE WIRELESS CHARGER CRADLE ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

  12. CHECK CAN WIRE 

    Pre-procedure1

    • Disconnect the cable from the negative (-) battery terminal.
    • Disconnect the I5 combination meter assembly connector.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I5-14 (MSCH) - I5-30 (MSCL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      I5-14 (MSCH) - I76-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      I5-30 (MSCL) - I76-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      I5-14 (MSCH) - I76-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      I5-30 (MSCL) - I76-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

    Result: 

    NG 

    See step  13

  13. CHECK CAN WIRE 

    Pre-procedure1

    • Disconnect the cable from the negative (-) battery terminal.
    • Disconnect the I197 multi-media module receiver assembly connector.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I197-11 (CNH1) - I197-12 (CNL1) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      I197-11 (CNH1) - I76-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      I197-12 (CNL1) - I76-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      I197-11 (CNH1) - I76-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      I197-12 (CNL1) - I76-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR 

  14. CHECK MULTI-MEDIA MODULE RECEIVER ASSEMBLY 

    Pre-procedure1

    • Disconnect the I5 combination meter assembly connector.
    • Using an oscilloscope, check the waveform.

      OK

      Tester Connection Switch Condition Tool Setting Specified Condition
      I5-14 (MSCH) - I5-30 (MSCL) Ignition switch ON 1 V/DIV., 100 μs./DIV. Pulse generation

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

    Result: 

    NG 

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

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