Steering Lock System - Unlock Position Sensor Signal Circuit

The steering lock ECU sends an unlock position signal to the main body ECU. On receiving the signal, the main body ECU permits an engine start. This prevents the engine from being started with the steering locked.


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

Dtc B2782 Power Source Control Ecu Malfunction

The steering lock ECU activates the steering lock motor by the power from the main body ECU through the IGE circuit. This prevents the steering from being locked while the vehicle is moving.


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

Dtc B2788 Ig2 Signal Malfunction

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


After receiving an integration relay (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 integration relay (IG2 relay) on signal. This prevents the steering from being locked while the vehicle is moving.

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