IMMOBILISER SYSTEM(w/o Smart Entry and Start System), Diagnostic DTC:B2796, B2798

DTC Code DTC Name
B2796 No Communication in Immobiliser System
B2798 Communication Malfunction No. 2

DESCRIPTION

This DTC is stored when a door control transmitter assembly is inserted into the ignition key cylinder but no communication occurs between the door control transmitter assembly and transponder key ECU assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B2796 No Communication in Immobiliser System The key ID code cannot be transmitted to the transponder key ECU assembly (1 trip detection logic*).

  • Door control transmitter assembly

  • Wire harness or connector

    DTC Output Confirmation Operation:

  • Insert the door control transmitter assembly into the ignition key cylinder.
B2798 Communication Malfunction No. 2 Key ID code identification cannot be completed within the specified time (1 trip detection logic*).

  • Door control transmitter assembly

  • Wire harness or connector

    DTC Output Confirmation Operation:

  • Insert the door control transmitter assembly into the ignition key cylinder.

Vehicle Condition and Fail-safe Operation when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Operation when Malfunction Detected
Engine cannot be started -
Related Data List and Active Test
DTC No. Data List and Active Test
B2796 -
B2798 -

WIRING DIAGRAM

B004MFVE17
*a Transponder Key Coil
*b Transponder Key ECU Assembly

CAUTION / NOTICE / HINT

Note


  • If the door control transmitter assembly is replaced, refer to Service Bulletin.

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - TRANSPONDER KEY COIL)


    1. Disconnect the K60 transponder key ECU assembly connector.

    2. Disconnect the K61 transponder key coil connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K60-2 (ANT1) - K61-1 (ANT1) Always Below 1 Ω
      K60-3 (ANT2) - K61-5 (ANT2) Always Below 1 Ω
      K60-2 (ANT1) or K61-1 (ANT1) - Other terminals and body ground Always 10 kΩ or higher
      K60-3 (ANT2) or K61-5 (ANT2) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE DOOR CONTROL TRANSMITTER ASSEMBLY

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR