SYSTEM DESCRIPTION
1. DESCRIPTION
(a) The steering lock system locks or unlocks the steering by activating the steering lock bar with a motor. The steering lock ECU activates the motor based on signals from the certification ECU and power management control ECU.
(b) A Local Interconnect Network (LIN) is used for communication between different ECUs in this system.
2. FUNCTIONS OF COMPONENTS
(a) The steering lock ECU controls the system based on information from the following components:
Item |
Function |
---|---|
Steering lock actuator assembly |
Consists of a motor, lock bar, lock and unlock position sensors, etc. activated by the steering lock ECU. |
Steering lock ECU |
|
Power management control ECU |
|
Certification ECU |
|
IG2 relay |
Controlled by the power management control ECU. Signals indicating the on/off status of this relay are sent to the power management control ECU and steering lock ECU. |
ID code box |
|
3. WARNING FUNCTION OF ENGINE SWITCH INDICATOR
*1 |
Indicator Light |
(a) The power management control ECU blinks the indicator light LED 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 |
|
Motor operates to release steering lock, but steering lock cannot be released (lock bar stuck in steering column). |
Push engine switch while turning steering wheel to right and left |
Malfunction in push button start function |
|
|
Troubleshoot by following "How to Proceed with Troubleshooting" (See
page |
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. CHECK LOWER NO. 2 INSTRUMENT PANEL AIRBAG ASSEMBLY (VEHICLE NOT INVOLVED IN
COLLISION)
(a) Perform a diagnostic system check (See page
).
(b) With the lower No. 2 instrument panel airbag installed on the vehicle, perf ...
Precaution
PRECAUTION
1. HANDLING PRECAUTIONS FOR STEERING SYSTEM
(a) Care must be taken when replacing parts. Incorrect replacement may affect
the performance of the steering system and result in driving hazards.
2. HANDLING PRECAUTIONS FOR SRS AIRBAG SYSTEM
(a) T ...