DESCRIPTION
The steering lock ECU and steering lock motor are built into the steering lock actuator or upper bracket assembly.
The steering lock ECU (steering lock actuator or upper bracket assembly) detects whether the steering lock is in the lock or unlock position by using the lock sensor and unlock sensor of the steering lock motor.
The steering lock ECU (steering lock actuator or upper bracket assembly) receives lock and unlock request signals from the certification ECU (smart key ECU assembly) and responds with lock and unlock operation signals.
HINT:
The steering lock ECU (steering lock actuator or upper bracket assembly) is not connected to the CAN communication system. However, the steering lock ECU (steering lock actuator or upper bracket assembly) is connected to the certification ECU (smart key ECU assembly) via LIN communication and communicates with other components via CAN communication through the certification ECU (smart key ECU assembly).
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Note |
---|---|---|---|---|
B2781 |
Open / Short in Steering Lock ECU |
One of the following conditions is met (1-trip detection logic (Only output while a malfunction is present and the engine switch is on (IG).)):
|
|
DTC Output Confirmation Operation: No confirmation operation is necessary (monitoring is continuous). |
Vehicle Condition when Malfunction Detected |
Fail-safe Function when Malfunction Detected |
---|---|
The steering cannot be locked or unlocked. For this reason, the engine cannot be started. |
Prohibits the engine from being started (the engine does not crank). |
DTC No. |
Data List Item |
Active Test Item |
---|---|---|
B2781 |
Smart Key
|
- |
CAUTION / NOTICE / HINT
NOTICE:
Click here
Click here
HINT:
When all the ECUs that are connected via LIN communication cannot communicate with the certification ECU (smart key ECU assembly), DTC B2785 is stored.
PROCEDURE
1. |
CHECK DTC |
(a) Using the Techstream, check if LIN communication DTC B2785 is output.
Click here
HINT:
If a LIN communication DTC is output, perform troubleshooting for the LIN communication system.
Click here
Result |
Proceed to |
---|---|
DTC B2785 is output. |
A |
DTC B2785 is not output. |
B |
A |
GO TO LIN COMMUNICATION SYSTEM (DTC B2785) |
B |
REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) |
Toyota CH-R Service Manual > Airbag System: Diagnosis System
DIAGNOSIS SYSTEM
CHECK DLC3
(a) Check the DLC3.
Click here
FUNCTION OF SRS WARNING LIGHT
(a) Primary check
(1) Turn the ignition switch off. Wait for at least 2 seconds, then turn the
ignition switch ON. The SRS warning light comes on for approximately 6 seconds and
diagnosis of the airb ...
Toyota CH-R Owners Manual > Theft deterrent system: Engine immobilizer system
The vehicle's keys have built-in transponder chips that prevent the
engine from starting if a key has not been previously registered in the vehicle's
on-board computer.
Never leave the keys inside the vehicle when you leave the vehicle.
This system is designed to help prevent vehic ...