PRECAUTION [05/2013 - ]
- 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 key system related ECUs (the certification ECU [smart key ECU assembly], power source control ECU, main body ECU, etc.) cannot be read. However, smart key system 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 Key / 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 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 [05/2013 - ]»(ref-615123-S24541716512014050900000) . NOTE: Any electrical key transmitters, or ECUs for which registration has been performed cannot be reused. ID code box (immobiliser code ECU) Certification ECU (smart key ECU assembly) Steering lock actuator assembly (steering lock ECU) Electrical key transmitter
Scheme 60
Scheme 61
Scheme 62
![Scheme 62: SYSTEM DIAGRAM [05/2013 - ]](https://i.diagnostdata.com/repair/44/4431dd9de9bbf6f30843f84b019677bbe4fb9a42704a0eea76fdc88f4b3e94fc.webp)
| Component | Outline |
|---|---|
| Steering lock actuator assembly (steering lock ECU) | The steering is locked and unlocked by communicating with the certification ECU (smart key ECU assembly), power source control ECU and ID code box (immobiliser code ECU) via LIN communication. When the following conditions are met, the steering can be unlocked. The codes (L codes) of the ID code box (immobiliser code ECU) and steering lock match. The codes (S codes) of the ID code box (immobiliser code ECU) and certification ECU (smart key ECU assembly) match. The certification ECU (smart key ECU assembly) and key ID codes match. |
| Power source control ECU | Outputs a command to supply power to the steering lock motor based on the power source mode, vehicle speed signal and shift position*. |
| Certification ECU (smart key ECU assembly) | The ID code of the electrical key transmitter the user is carrying is sent to the indoor electrical key antenna assembly. The certification ECU (smart key ECU assembly) 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 (smart key ECU assembly) permits the power source control ECU and steering lock ECU to turn the power on, start the engine and unlock and lock the steering. |
| ID code box (immobiliser code ECU) | Receives immobiliser set and unset commands from the certification ECU (smart key ECU assembly) via LIN communication and sends them to the ECM. |
CIRCUIT DESCRIPTION
- *: for Automatic Transaxle