Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - STEERING COLUMN
STEERING LOCK SYSTEM - SYSTEM DESCRIPTION
| DESCRIPTION |
The steering lock system locks and unlocks the steering lock by activating the steering lock bar with a motor. The steering lock ECU activates the motor based on permission signals from the certification ECU (smart key ECU assembly) and main body ECU.
| FUNCTIONS OF COMPONENTS |
| Item | Function |
| Steering lock actuator assembly | Includes motor, lock bar and lock and unlock position sensors. Activated by steering lock ECU. |
| Steering lock ECU | Included in steering lock actuator assembly. Activates steering lock motor based on permission signals from main body ECU and certification ECU (smart key ECU assembly). Detects steering lock and unlock positions and transmits status to other ECUs. |
| Main body ECU | Permits steering lock ECU to supply power to activate motor. Main body ECU and certification ECU (smart key ECU assembly) permit engine start after receiving unlock signal from steering lock ECU. |
| Certification ECU (Smart Key ECU Assembly) | Orders steering lock ECU to lock or unlock steering lock. Main body ECU and certification ECU (smart key ECU assembly) permit engine start after receiving unlock signal from steering lock ECU. |
| Integration relay (IG2 relay) | Controlled by main body ECU. Sends IG signals to steering lock ECU. |
| ID code box (Immobiliser Code ECU) | Transmits command to set or cancel immobiliser to ECM based on permission signals from certification ECU (smart key ECU assembly). |
| WARNING FUNCTION OF ENGINE SWITCH INDICATOR |
The main body ECU blinks the LED indicator of the engine switch when any of the following problems occur in the system.
| Detection Item | Indicator Blink Pattern | Indication Status | Countermeasure |
| Steering lock release malfunction | Blinks in green at 1-second intervals Goes off 30 seconds after blinking starts | Motor operates to release steering lock, but steering lock cannot be released (e.g. lock bar stuck in steering column) | Push engine switch while turning steering wheel to right and left |
| Malfunction in push button start function | Blinks in amber at 2-second intervals Goes off 15 seconds after blinking starts | Short in devices for activating motor Problem in steering lock ECU or main body ECU | Troubleshoot by following "How to Proceed with Troubleshooting" () |