Dtc B2781 Open / Short In Steering Lock Ecu
DESCRIPTION
INSPECTION PROCEDURE
REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)
DTC B2781 Open / Short in Steering Lock ECU |
DESCRIPTION
If the steering lock ECU determines that there is a malfunction inside the ECU, it outputs this DTC. The steering lock ECU diagnosis information cannot be read directly from the steering lock ECU by the Techstream. The diagnosis information from the steering lock ECU is transmitted to the Techstream via the certification ECU to the Techstream using the Controller Area Network (CAN).DTC No.
| DTC Detecting Condition
| Trouble Area
|
B2781
| - Steering lock motor drive circuit is defective.
- Both lock and unlock position sensors detect "ON".
| Steering lock actuator assembly (Steering lock ECU)
|
INSPECTION PROCEDURE
- HINT:
- When the engine switch is off, the main body ECU may occasionally go into a non-active state called sleep mode. Therefore, before proceeding with the inspection, it is necessary to perform the following step to wake up the ECU:
- Before starting the inspection, open the driver door with the engine switch off. Then (with the engine switch still off) open and close any door several times at 1.5-second intervals.
- NOTICE:
- If the steering lock actuator (steering lock ECU) is replaced, open and close the driver side door with the engine switch off and the shift lever in neutral to record the current lock position into the steering lock ECU. If this is not performed, the engine may not start.
| 1.REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) |
- HINT:
- The steering lock ECU and steering lock actuator assembly are supplied as a unit.
Replace the steering lock actuator assembly (COROLLA_ZRE142 RM000000UD005GX.html).