DESCRIPTION
If the steering lock ECU (steering lock actuator assembly) determines that there is a malfunction inside the ECU, it outputs this DTC. Diagnostic communication between the steering lock ECU (steering lock actuator assembly) and the Techstream is performed via the certification ECU as the steering lock ECU (steering lock actuator assembly) is not connected to CAN.
| DTC No. | DTC Detecting Condition | Trouble Area |
|---|---|---|
| B2781 | Steering lock motor drive circuit is defective. Both lock and unlock position sensors detect "ON". | Steering lock ECU (Steering lock actuator assembly) |
The power management control ECU controls the power supply to activate the steering lock motor. This prevents the steering wheel from being locked while the vehicle is moving.
| DTC No. | DTC Detecting Condition | Trouble Area |
|---|---|---|
| B2782 | Steering lock motor drive control circuit is defective. | Wire harness Steering lock ECU (Steering lock actuator assembly) Power management control ECU |
Scheme 62
The steering lock ECU (steering lock actuator assembly) receives power from the IG2 relay. When the voltage value indicated by the IG signal from the certification ECU (smart key ECU assembly) equals to the voltage that is applied to the steering lock ECU (steering lock actuator assembly), the steering wheel will be unlocked. The steering lock ECU (steering lock actuator assembly) will not lock the steering wheel 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 1 second. | IG2 relay Wire harness Power management control ECU Steering lock ECU (Steering lock actuator assembly) |
Scheme 63
The steering lock ECU (steering lock actuator assembly) is connected to the power management control ECU. The steering lock ECU (steering lock actuator assembly) cannot activate the motor unless it receives permission signals from both ECUs. (The power management control ECU permits the steering lock ECU (steering lock actuator assembly) to supply power to activate the motor.)
The unlock position sensor is one of the components comprising the steering lock ECU (steering lock actuator assembly). The sensor switch contact closes when the steering lock is released. The steering lock release signal is then sent to the power management control ECU. Upon receiving the signal, the ECU permits engine start. This prevents the engine from being started with the steering wheel locked.
Scheme 64
This circuit supplies power source voltage from the battery to terminal B of the steering lock ECU (steering lock actuator assembly). This is used as power source for the CPU, motor, communication, and peripheral circuits.
Scheme 65
See also:
• REMOVAL [08/2013 - ]