Toyota Sienna Quiz
Engine immobiliser

Engine Immobiliser System Malfunction

In this manual: Engine immobiliser
Introduction — 55Service specifications — 7Maintenance — 7Engine — 264U151e automatic transaxle — 108Transfer — 19Propeller shaft — 8Drive shaft — 14Differential — 16Axle — 18Suspension — 37Tire and wheel — 54Brake control — 141Parking brake — 16Steering Column — 11Power steering — 18Air conditioning — 106Supplemental restraint system — 146Seat belt — 22Theft deterrent — 14Engine immobiliser — 17Cruise control — 65Lighting — 61Wiper and washer — 13Door lock — 42Meter — 28Audio / visual — 94Navigation — 108Park assist / monitoring — 33Horn — 5Garage door opener — 42GR-FE Engine control system — 126Supplemental restraint system — 147Other system — 14Windshield / windowglass — 43Mirror — 23Instrument panel — 6Seat belt — 22Seat — 92Engine hood / door — 104Exterior — 39Interior — 5Sliding roof — 9Multiplex communication — 18Can communication — 23
2steps
~12min
1/5difficulty
Done 0 of 2

DTC B2799 Engine Immobiliser System Malfunction

DESCRIPTION

This DTC is output when the ECM detects errors in communication between the transponder key ECU and the ECM, or in the communication lines. This DTC is also output when an engine start is attempted while the ECU communication ID between the transponder key ECU and the ECM are different. Before troubleshooting for this DTC, make sure that there is no DTC detected in the transponder key ECU. If there is key code-related DTC detected in the transponder key ECU, repair it first.

DTC No.

DTC Detection Condition

Trouble Area

B2799
  • Error in communication between ECM and transponder key ECU, and in communication line
  • Communication ID is different during communication with transponder key ECU
  • Wire harness
  • Transponder key ECU assembly
  • Transponder key amplifier
  • ECM

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

1 CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - ECM)

CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - ECM)
  1. Disconnect the T6 ECU and E5 ECM connectors.
  2. Check the resistance of the wire harness side connectors.

Resistance

Resistance

2 CHECK TRANSPONDER KEY ECU ASSEMBLY

  1. After replacing the transponder key ECU assembly with a normally functioning transponder key ECU assembly, check that the engine starts.

OK: The engine starts

END

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