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 (TRANSPONDER KEY ECU - ECM)

CHECK TRANSPONDER KEY ECU (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 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 Code
DTC Detection Condition
Trouble Area
B2799
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. Transponder key ECU
  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 RM000001TCQ00EX.html).

  1. Recheck for 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 (TRANSPONDER KEY ECU - 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 E50 ECU connector.

  1. Disconnect the A12 ECM connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E50-13 (EFIO) - A12-11 (IMI)
    		Always
    		Below 1 Ω
    E50-12 (EFII) - A12-10 (IMO)
    E50-13 (EFIO) or A12-11 (IMI) - Body ground
    		Always
    		10 kΩ or higher
    E50-12 (EFII) or A12-10 (IMO) - Body ground


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK TRANSPONDER KEY ECU (OPERATION)

  1. Temporarily replace the transponder key ECU with a new or normally functioning one.

  1. Check that the engine starts normally.

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


B
REPLACE ECM (RAV4_ACA30 RM0000017UO01FX.html)

C
REPLACE ECM (RAV4_ACA30 RM0000017UO01HX.html)

D
REPLACE ECM (RAV4_ACA30 RM0000017UO01GX.html)

E
REPLACE ECM (RAV4_ACA30 RM0000017UO01KX.html)
A

END (TRANSPONDER KEY ECU IS DEFECTIVE)