Door Lock - Smart Key System

DOOR LOCK: SMART KEY SYSTEM: B2799: Communication with Immobiliser

DTC B2799 - Communication with Immobiliser

DESCRIPTION

- If the ID code box receives a verification request signal from the ECM, it sends back verification information obtained from the certification ECU or steering lock ECU via the LIN communication line to the ECM.
- The ID code box sends immobilizer SET / UNSET signals to the ECM based on the information received from the certification ECU via the LIN communication line.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC OUTPUT
(a) Delete the DTCs .
(b) Recheck for DTCs.
OK:
B2799 output does not recur.
NG -- RE-REGISTER ECU COMMUNICATION ID
OK -- USE SIMULATION METHOD TO CHECK
2. RE-REGISTER ECU COMMUNICATION ID
(a) Re-register the ECU communication ID .
NEXT -- Continue to next step.
3. CHECK DTC OUTPUT
(a) Delete the DTCs .
(b) Recheck for DTCs.
OK:
B2799 output does not recur.
NG -- CHECK CONNECTION OF CONNECTOR
OK -- END
4. CHECK CONNECTION OF CONNECTOR
(a) Turn the power switch OFF.
(b) Check that the connectors are properly connected to the ECM and the transponder key ECU.
OK:
Connectors are properly connected.
NG -- CONNECT CONNECTORS PROPERLY
OK -- Continue to next step.
5. CHECK WIRE HARNESS (ECM - ID CODE BOX)





(a) Disconnect the D29 ID code box and A55 ECM connectors.
(b) Measure the resistance according to the value(s) in the table below.
Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
6. REPLACE ECM
(a) Replace the ECM Removal.
NEXT -- Continue to next step.
7. REGISTER ECU COMMUNICATION ID
(a) Register the ECU communication ID .
NEXT -- Continue to next step.
8. CHECK DTC OUTPUT
(a) Delete the DTCs .
(b) Recheck for DTCs.
OK:
B2799 output does not recur.
NG -- REPLACE ID CODE BOX
OK -- END