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DTC B2788: IG2 Signal Malfunction: Description

The steering lock ECU receives power from the IG2 relay. When the voltage value indicated by the IG signal from the certification ECU equals to the voltage that is applied to the steering lock ECU, the steering will be unlocked. The steering lock ECU will not lock the steering when power from the IG2 relay is present. This prevents the steering from being locked while the vehicle is moving.

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
  • Power source control ECU
  • Steering lock actuator assembly (Steering lock ECU)