METER / GAUGE SYSTEM, Diagnostic DTC:B1321

DTC Code DTC Name
B1321 Lost Communication with EMV

DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area Memory
B1321 Lost Communication with EMV

  • DTC Detection Condition: IG+ voltage 9.5 to 11.5 V or higher

  • Malfunction Status: Lost communication with radio receiver assembly

  • Malfunction Duration: 30 seconds or more

  • Harness or connector

  • Radio receiver assembly

  • Combination meter assembly

  • No. 4 CAN junction connector

 DTC stored

WIRING DIAGRAM

B004AJNE02
*a Combination Meter Assembly
*b No. 4 CAN Junction Connector
*c Radio Receiver Assembly
*d Local Bus Communication Line

CAUTION / NOTICE / HINT

Note


  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

    Click here

  • When disconnecting the cable from the negative (-) auxiliary battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected.

    Click here

  • When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

  • The following malfunctions may occur if a radio receiver assembly from another vehicle is installed to this vehicle. Therefore, when replacing the radio receiver assembly, be sure to replace it with new one.


    • Communication malfunction DTC is output

    • Does not operate normally

Tech Tips


  • B1321 will not continue to output when clear DTC is performed even if the malfunction continues.

  • Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed.

    Click here

PROCEDURE


  1. CHECK FOR DTC (NAVIGATION SYSTEM)


    1. Check if navigation system DTCs are output.

      Click here


      Body Electrical > Navigation System > Trouble Codes
      Result
      Result Proceed to
      Navigation system DTCs are not output. A
      Navigation system DTCs are output. B

    B

    GO TO NAVIGATION SYSTEM Click here

    A

  2. CHECK HARNESS AND CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - RADIO RECEVER ASSEMBLY)

    B004C64C49
    *a

    Rear view of wire harness connector

    (to No. 4 CAN Junction Connector)

    1. Disconnect the No. 4 CAN junction connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      P116-4 - P116-15 Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (RADIO RECEVER ASSEMBLY - NO. 4 CAN JUNCTION CONNECTOR) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)

    B004C64C49
    *a

    Rear view of wire harness connector

    (to No. 4 CAN Junction Connector)

    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      P116-1 - P116-12 Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NO. 4 CAN JUNCTION CONNECTOR

    NG

  4. CHECK HARNESS AND CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)

    B004BD4C10
    *a

    Front view of wire harness connector

    (to Combination Meter Assembly Connector)

    1. Disconnect the combination meter assembly connector.

    2. Reconnect the P116 No. 4 CAN junction connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      P26-10(TX+) - P26-9(TX-) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. CHECK HARNESS AND CONNECTOR (RADIO RECEVER ASSEMBLY - NO. 4 CAN JUNCTION CONNECTOR)

    B004B4EC07
    *a

    Front view of wire harness connector

    (to Radio Recever Assembly Connector)

    1. Disconnect the radio recever assembly connector.

    2. Reconnect the P116 No. 4 CAN junction connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      P46-5(CNH1) - P46-6(CNL1) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR