PRECAUTION
- PRECAUTIONS WHEN CHECKING FOR DTCS When the cable is disconnected from the negative (-) battery terminal, the DTCs stored in the steering lock actuator assembly (steering lock ECU) are cleared. Be sure to record any output DTCs immediately. Normally, with the engine switch off, even if the Techstream is connected to the vehicle, the information stored in smart access system with push-button start related ECUs (the certification ECU, power management control ECU, main body ECU, etc.) cannot be read. However, smart access system with push-button start DTCs and Data List information can be confirmed even if the engine switch is off using either of the two methods below: Connect the Techstream to the vehicle, and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins (the Techstream screen changes when communication begins). Connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: Body Electrical / Smart Access / Trouble Codes.
- PRECAUTIONS WHEN REPLACING STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) If the steering lock actuator assembly (steering lock ECU) is replaced, be sure to confirm that the steering is unlocked by turning the steering wheel to the left and right before starting the engine. If the steering is locked for any reason, open and close a door with the engine switch off, and then unlock the steering lock by pressing the engine switch. This prevents the engine from starting while the steering is locked.
- PRECAUTION FOR REGISTRATION If replacing any of the following parts, refer to the registration procedures. Refer to «REGISTRATION»(ref-524134-S05166328262013012800000) . ID code box Certification ECU Steering lock actuator assembly (steering lock ECU) ECM Electrical key transmitter (key)
Scheme 63
Scheme 64
Scheme 65
| Component | Outline |
|---|---|
| Steering lock actuator assembly (steering lock ECU) | The steering is locked and unlocked by communicating with the certification ECU, power management control ECU and ID code box via LIN communication. When the following conditions are met, the steering can be unlocked. The codes (L codes) of the ID code box and steering lock match. The codes (S codes) of the ID code box and certification ECU match. The certification ECU and key ID codes match. |
| Power management control ECU | Outputs a command to supply power to the steering lock motor based on the power source mode, shift position and vehicle speed signal. |
| Certification ECU | The ID code of the key the user is carrying is sent to the indoor electrical key antenna assembly. The certification ECU compares the key ID code it receives from the indoor electrical key antenna assembly with its own ID code. If they match, the certification ECU permits the power management control ECU and steering lock ECU to turn the power on, start the engine and unlock and lock the steering. |
| ID code box | Receives immobilizer set and unset commands from the certification ECU via LIN communication and sends them to the ECM. |
CIRCUIT DESCRIPTION