Dtc B2799 Engine Immobiliser System Malfunction

Securities. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
Engine Immobiliser. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC

CHECK WIRE HARNESS (ID CODE BOX - ECM)

REREGISTER ECU CODE REGISTRATION

CHECK ID CODE BOX (OPERATION)

DTC B2799 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 ID code box; 2) the ECM detects errors in the communication lines; or 3) the ECU communication ID between the ID code box and ECM is different and an engine start is attempted. Before troubleshooting for this DTC, make sure no certification ECU DTCs are present. If present, troubleshoot the certification ECU DTCs first.

DTC Code
DTC Detection Condition
Trouble Area
B2799
One of following conditions is met:
  1. Error in communication between ECM and ID code box
  2. Error in communication lines
  3. Communication ID is different during communication with ID code box
  1. Wire harness
  2. ID code box
  3. ECM

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Engine Immobiliser.Engine Immobiliser System (W/ Entry And Start System). Dtc B2799 Engine Immobiliser System Malfunction


INSPECTION PROCEDURE

1.CHECK FOR DTC

  1. Clear the DTC (RAV4_ACA30 RM000001RM1004X.html).

  1. Recheck for the DTC.

    OK:
    B2799 is not output.


NG
Go to step 2
OK

USE SIMULATION METHOD TO CHECK (RAV4_ACA30 RM000000UZ306OX.html)

2.CHECK WIRE HARNESS (ID CODE BOX - ECM)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Engine Immobiliser.Engine Immobiliser System (W/ Entry And Start System). Dtc B2799 Engine Immobiliser System Malfunction

  1. Disconnect the E51 box connector.

  1. Disconnect the A12 ECM connector.

  1. Measure the resistance of the wire harness connectors.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E51-5 (EFII) - A12-10 (IMO)
    		Always
    		Below 1 Ω
    E51-6 (EFIO) - A12-11 (IMI)
    E51-5 (EFII) or A12-10 (IMO) - Body ground
    		Always
    		10 kΩ or higher
    E51-6 (EFIO) or A12-11 (IMI) - Body ground


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.REREGISTER ECU CODE REGISTRATION

  1. Clear the DTC (RAV4_ACA30 RM000001RM1004X.html).

  1. Reregister the ID code box and ECM communication ID.

  1. Check that the engine starts.

    OK:
    Engine starts.


NG
END (PROBLEM HAS BEEN CAUSED BY REGISTRATION FAILURE)
OK


4.CHECK ID CODE BOX (OPERATION)

  1. Temporarily replace the ID code box with a new one.

  1. Check that the engine starts.

    OK:
    Engine starts.
    Result
    Result
    		Proceed to
    OK
    		A
    NG (for 1AZ-FE)
    		B
    NG (for 2AZ-FE)
    		C
    NG (for 3ZR-FAE)
    		D


B
REPLACE ECM (RAV4_ACA30 RM0000017UO01FX.html)

C
REPLACE ECM (RAV4_ACA30 RM0000017UO01HX.html)

D
REPLACE ECM (RAV4_ACA30 RM0000017UO01KX.html)
A

END (ID CODE BOX IS DEFECTIVE)