Dtc B2799/99 Engine Immobiliser System Malfunction


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK WIRE HARNESS (TRANSPONDER KEY ECU - ECM)

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
  2. Error in communication lines
  3. Communication ID is different during communication with transponder key ECU
  1. Wire harness
  2. ECM

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Engine Immobiliser.Engine Immobiliser System. Dtc B2799/99 Engine Immobiliser System Malfunction


INSPECTION PROCEDURE

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

Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Engine Immobiliser.Engine Immobiliser System. Dtc B2799/99 Engine Immobiliser System Malfunction

  1. Disconnect the T21 ECU connector.

  1. Disconnect the E13*1, E9*2 or E5*3 ECM connector.

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

    HINT:
    *1: for 1GR-FE
    *2: for 2TR-FE
    *3: for 1KD-FTV

    Standard resistance:
    for 1GR-FE:
    Tester Connection
    		Specified Condition
    T21-13 (EFIO) - E13-16 (IMI)
    		Below 1 Ω
    T21-12 (EFII) - E13-15 (IMO)
    T21-13 (EFIO) or E13-16 (IMI) - Body ground
    		10 kΩ or higher
    T21-12 (EFII) or E13-15 (IMO) - Body ground
    for 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
    T21-12 (EFII) or E9-15 (IMO) - Body ground
    for 1KD-FTV:
    Tester Connection
    		Specified Condition
    T21-13 (EFIO) - E5-30 (IMI)
    		Below 1 Ω
    T21-12 (EFII) - E5-29 (IMO)
    T21-13 (EFIO) or E5-30 (IMI) - Body ground
    		10 kΩ or higher
    T21-12 (EFII) or E5-29 (IMO) - Body ground


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM