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Home >> Lexus >> 2007 >> GS 450h >> Repair and Diagnosis (Single Page) >> Steering >> Steering Column >> Steering Column >> Steering Lock System >> DTC B2788 IG2 Signal Malfunction >> Description

DTC B2788 IG2 Signal Malfunction: Description

The steering lock ECU receives IG2 relay signals. Receiving the signals, the steering lock ECU determines that the vehicle is moving. The steering lock ECU does not lock the steering when it receives an IG2 relay ON signal (to prevent the steering from being locked while the vehicle is moving).

DTC DETECTION CONDITION CHART

DTC No. DTC Detection 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 (Steering lock ECU)
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