DTC B2781 Open / Short in Steering Lock ECU
for Preparation Click here
DESCRIPTION
The steering lock ECU and steering lock actuator assembly are supplied as a unit.
The steering lock ECU detects the steering lock position through the signals from the lock and unlock position sensors.
The steering lock ECU activates the steering lock motor based on permission signals from the main body ECU and the certification ECU (smart key
ECU assembly).
The diagnosis information of the steering lock ECU is transmitted to the intelligent tester via the certification ECU (smart key ECU assembly) as the
steering lock ECU is not connected to the CAN communication system.
DTC Code Detection Condition Trouble Area
B2781
When either condition below is met:
A steering lock motor drive power circuit malfunction.
The ON condition for both the lock and unlock position
sensors is detected.
Steering lock actuator assembly
(steering lock ECU)
Certification ECU (smart key ECU
assembly)
Harness or connector of LIN bus line
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 steps to wake up the ECU:
With the engine switch off, open the driver door. Then (with the engine switch still off) open and close any door several times at 1.5 second intervals.
1.CHECK DTC OUTPUT (B2785)
a. Check for DTCs.
OK:
DTC B2781 is output, but DTC B2785 is not output.
NG
GO TO LIN COMMUNICATION SYSTEM (DTC B2785) ( Click
here)
OK
REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) ( Click here)
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