Up to 08/2009

STEERING COLUMN: STEERING LOCK SYSTEM: B2781: Open / Short in Steering Lock ECU
B2781 - Open / Short in Steering Lock ECU

DESCRIPTION

If the steering lock ECU (steering lock actuator assembly) determines that there is a malfunction inside the ECU, it outputs this DTC. Diagnostic communication between the steering lock ECU (steering lock actuator assembly) and the Techstream is performed via the certification ECU (smart key ECU assembly) as the steering lock ECU (steering lock actuator assembly) is not connected to CAN.

The steering lock ECU and steering lock actuator assembly are supplied as a unit. The steering lock ECU (steering lock actuator assembly) detects the steering lock position through the signals from the lock and unlock position sensors.

The steering lock ECU (steering lock actuator assembly) activates the steering lock motor based on permission signals from the power management control ECU and the certification ECU (smart key ECU assembly).





INSPECTION PROCEDURE

NOTICE:
* If the steering lock ECU (steering lock actuator assembly) is replaced, with the engine switch off and the shift lever to P, open and close the driver side door to record the current lock position into the steering lock ECU (steering lock actuator assembly). If this is not performed, the engine may not start.
* After replacing the steering lock ECU (steering lock actuator assembly), perform the key ID code registration Engine Immobilizer System.
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.

PROCEDURE

1. CHECK DTC OUTPUT (B2785)

(a) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result





B -- GO TO LIN COMMUNICATION SYSTEM (B2785) Up to 08/2009

A -- REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Disassembly