GSIC - Global Service Information Center

### DTC 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:

1. Error in communication between ECM and transponder key ECU assembly
2. Error in communication lines
3. Communication ID is different during communication with transponder key ECU assembly

1. Wire harness
2. ECM

## WIRING DIAGRAM

## INSPECTION PROCEDURE

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

1. Disconnect the T21 ECU connector.

1. Disconnect the E6, E10 or E14 ECM connector.

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

   Standard resistance (2TR-FE):

     Tester Connection | Specified Condition
     T21-13 (EFIO) - E10-16 (IMI) | Below 1 Ω
     T21-12 (EFII) - E10-15 (IMO) | Below 1 Ω
     T21-13 (EFIO) or E10-16 (IMI) - Body ground | 10 kΩ or higher
     T21-13 (EFIO) or E10-16 (IMI) - Body ground | 10 kΩ or higher

   Standard resistance (1GR-FE):

     Tester Connection | Specified Condition
     T21-13 (EFIO) - E14-16 (IMI) | Below 1 Ω
     T21-12 (EFII) - E14-15 (IMO) | Below 1 Ω
     T21-12 (EFII) or E14-15 (IMO) - Body ground | 10 kΩ or higher
     T21-12 (EFII) or E14-15 (IMO) - Body ground | 10 kΩ or higher

   Standard resistance (1KD-FTV):

     Tester Connection | Specified Condition
     T21-13 (EFIO) - E6-30 (IMI) | Below 1 Ω
     T21-12 (EFII) - E6-29 (IMO) | Below 1 Ω
     T21-13 (EFIO) or E6-16 (IMI) - Body ground | 10 kΩ or higher
     T21-13 (EFIO) or E6-16 (IMI) - Body ground | 10 kΩ or higher

| NG |

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK |

REPLACE ECM