Steering Column. Dtc B2781 Open / Short In Steering Lock Ecu

Steering. Land Cruiser. Urj200, 202 Grj200 Vdj200

Steering Column. Land Cruiser. Urj200, 202 Grj200 Vdj200

DTC B2781 Open / Short in Steering Lock ECU

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: Steering lock motor drive power circuit malfunction Lock and unlock position sensors ON condition 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)

Check for DTCs.

Result
Result	Proceed to
DTC B2781 is output, but DTC B2785 is not output (for Power tilt and telescopic)	A
Condition other than following: DTC B2781 is output, but DTC B2785 is not output	B
DTC B2781 is output, but DTC B2785 is not output (for Manual tilt and telescopic)	C

GO TO LIN COMMUNICATION SYSTEM (DTC B2785) (Click here)

REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) (Click here)