Dtc B2799 Engine Immobiliser System Malfunction
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CLEAR DTC
CHECK FOR DTC
REREGISTER ECU CODE
CLEAR DTC
CHECK FOR DTC
CHECK CONNECTION OF CONNECTOR
CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - ECM)
REPLACE ECM
REGISTER ECU CODE
CLEAR DTC
CHECK FOR DTC
DTC B2799 Engine Immobiliser System Malfunction
DESCRIPTION
This DTC is output when one of the following occurs: 1) the ECM detected errors in its own communications with the ID code box (immobiliser code ECU); 2) the ECM detects errors in the communication lines; or 3) the ECU communication ID between the ID code box (immobiliser code ECU) and ECM is different and an engine start is attempted.
Before troubleshooting for this DTC, make sure no certification ECU DTCs are stored. If stored, troubleshoot the certification ECU DTCs first.
| DTC Code | DTC Detection Condition | Trouble Area |
| B2799 | One of following conditions is met:
Error in the communication between the ECM and the ID code box (immobiliser code ECU).
Error in the communication lines.
The communication ID is different during communication with the ID code box (immobiliser code ECU).
| Harness or connector
ECM
ID code box (immobiliser code ECU)
|
WIRING DIAGRAM
INSPECTION PROCEDURE
Check for DTCs ().
- OK:
- DTC B2799 is not output.
| OK | |
| |
| USE SIMULATION METHOD TO CHECK ()
|
|
Reregister the recognition codes in the ECUs.
Check for DTCs ().
- OK:
- DTC B2799 is not output.
| OK | |
| |
| END (RECOGNITION CODE IN ECU IS DEFECTIVE) |
|
| 6.CHECK CONNECTION OF CONNECTOR |
Turn the engine switch off.
Check that the connectors are properly connected to the ECM and the ID code box.
- OK:
- Connectors are properly connected.
| | CONNECT CONNECTORS PROPERLY |
|
|
| 7.CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - ECM) |
Disconnect the E28 ID code box connector.
Disconnect the A38*1 or A52*2 ECU connector.
Measure the resistance according to the value(s) in the table below.
for 1UR-FE
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| E28-5 (EFII) - A38*1-29 (IMO) | Always | Below 1 Ω |
| E28-6 (EFIO) - A38*1-40 (IMI) |
| E28-5 (EFII) or A38*1-29 (IMO) - Body ground | Always | 10 kΩ or higher |
| E28-6 (EFIO) or A38*1-40 (IMI) - Body ground |
| E28-5 (EFII) - A52*2-29 (IMO) | Always | Below 1 Ω |
| E28-6 (EFIO) - A52*2-40 (IMI) |
| E28-5 (EFII) or A52*2-29 (IMO) - Body ground | Always | 10 kΩ or higher |
| E28-6 (EFIO) or A52*2-40 (IMI) - Body ground |
for 1GR-FE, 1VD-FTV
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| E28-5 (EFII) - A38*1-10 (IMO) | Always | Below 1 Ω |
| E28-6 (EFIO) - A38*1-11 (IMI) |
| E28-5 (EFII) or A38*1-10 (IMO) - Body ground | Always | 10 kΩ or higher |
| E28-6 (EFIO) or A38*1-11 (IMI) - Body ground |
| E28-5 (EFII) - A52*2-10 (IMO) | Always | Below 1 Ω |
| E28-6 (EFIO) - A52*2-11 (IMI) |
| E28-5 (EFII) or A52*2-10 (IMO) - Body ground | Always | 10 kΩ or higher |
| E28-6 (EFIO) or A52*2-11 (IMI) - Body ground |
for 3UR-FE
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| E28-5 (EFII) - A38-29 (IMO) | Always | Below 1 Ω |
| E28-6 (EFIO) - A38-40 (IMI) |
| E28-5 (EFII) or A38-29 (IMO) - Body ground | Always | 10 kΩ or higher |
| E28-6 (EFIO) or A38-40 (IMI) - Body ground |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
for 1GR-FE
Temporarily replace the ECM with a new one ().
for 1UR-FE
Temporarily replace the ECM with a new one ().
for 1VD-FTV
Temporarily replace the ECM with a new one ().
for 3UR-FE
Temporarily replace the ECM with a new one ().
Register the recognition codes in the ECUs.
Check for DTCs ().
- OK:
- DTC B2799 is not output.
| | REPLACE ID CODE BOX (IMMOBILISER CODE ECU) |
|
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