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Home >> Toyota >> 2011 >> Highlander Hybrid Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 90 (Steering Lock System (Diagnostic Codes & Circuit Tests)) >> Steering Lock System >> DTC B2788: IG2 Signal Malfunction >> Description

DTC B2788: IG2 Signal Malfunction: Description

WARNING: This page is about a different variant/trim than selected.

The steering lock ECU determines the on/off status of the engine switch through the IG2 signal circuit.

After receiving an IG2 relay ON signal, the steering lock ECU determines that the vehicle is moving. The steering lock ECU does not lock the steering when it receives the IG2 relay ON signal. This prevents the steering from being locked while the vehicle is moving.

The diagnosis information of the steering lock ECU is transmitted to the tester via the certification ECU (smart key ECU assembly) as the steering lock ECU is not connected to the CAN communication system.

DTC No. DTC Detecting Condition Trouble Area
B2788 Different information is obtained from IG2 signals received directly from the IG2 circuit, and from IG2 signals sent via LIN communication for a period of 1 second.
  • IG2 relay
  • Wire harness
  • Main body ECU
  • Steering lock actuator assembly (Steering lock ECU)