ENGINE IMMOBILISER SYSTEM, Diagnostic DTC:B2799/99

DTC Code DTC Name
B2799/99 Engine Immobiliser System Malfunction

DESCRIPTION

This DTC is output when one of the following occurs: 1) the ECM detects errors in its own communications with the transponder key ECU; 2) the ECM detects errors in the communication lines; or 3) the ECU communication ID between the transponder key ECU and ECM is different and an engine start is attempted. Before troubleshooting for this DTC, make sure no transponder key ECU DTCs are present. If present, troubleshoot the transponder key ECU DTCs first.

DTC No. DTC Detection Condition Trouble Area
B2799/99

One of following conditions is met:


  • Error in communication between ECM and transponder key ECU

  • Error in communication lines

  • Communication ID is different during communication with transponder key ECU

  • Wire harness

  • ECM

WIRING DIAGRAM

A01J4AZE04

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK WIRE HARNESS (TRANSPONDER KEY ECU - ECM)

    A01J67YE01

    1. Disconnect the T21 ECU connector.

    2. Disconnect the E9 or E13 ECM connector.

    3. Measure the resistance of the wire harness side connectors.

      Standard resistance
      2TR-FE
      Tester Connection Specified Condition
      T21-13 (EFIO) - E9-16 (IMI) Below 1 Ω
      T21-12 (EFII) - E9-15 (IMO)
      T21-13 (EFIO) or E9-16 (IMI) - Body ground 10 kΩ or higher
      T21-13 (EFIO) or E9-16 (IMI) - Body ground
      1GR-FE
      Tester Connection Specified Condition
      T21-13 (EFIO) - E13-16 (IMI) Below 1 Ω
      T21-12 (EFII) - E13-15 (IMO)
      T21-12 (EFII) or E13-15 (IMO) - Body ground 10 kΩ or higher
      T21-12 (EFII) or E13-15 (IMO) - Body ground

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

    REPLACE ECM