Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC B2788: IG2 Signal Malfunction [11/2018 - 12/2021]: Description
This DTC is stored when the steering lock ECU (steering lock actuator with ECU assembly) detects an IG2 power supply malfunction.
The steering lock ECU (steering lock actuator with ECU assembly) is not connected to the CAN communication system. However, the steering lock ECU (steering lock actuator with ECU assembly) is connected to the certification ECU (smart key ECU assembly) via LIN communication and communicates with other components via CAN communication through the certification ECU (smart key ECU assembly).
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
|---|---|---|---|---|
| B2788 | IG2 Signal Malfunction | Mismatch between the steering lock ECU (steering lock actuator with ECU assembly) IG2 input from the LIN communication system and from the direct line. (1-trip detection logic (Only output while a malfunction is present and the engine switch is on (IG).)) |
|
DTC Output Confirmation Operation:
|
| Vehicle Condition when Malfunction Detected | Fail-safe Function when Malfunction Detected |
|---|---|
| The steering cannot be locked or unlocked. For this reason, the engine cannot be started. | - |
| DTC No. | Data List and Active Test |
|---|---|
| B2788 | - |
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.