From 08/2009
STEERING COLUMN: STEERING LOCK SYSTEM: B2782: Power Source Control ECU Malfunction
B2782 - Power Source Control ECU Malfunction
DESCRIPTION
* The steering lock ECU (steering lock actuator assembly) activates the steering lock motor by the power from the power management control
ECU through the IGE circuit. This prevents the steering wheel from being locked while the vehicle is moving.
* If NG (Past) is displayed for Power Supply Open in the Data List, perform troubleshooting according to the procedures below.
The diagnosis information of the steering lock ECU (steering lock actuator assembly) is transmitted to the Techstream via the certification ECU
(smart key ECU assembly) as the steering lock ECU (steering lock actuator assembly) is not connected to the CAN communication system.
WIRING DIAGRAM
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 See:
Accessories and Optional Equipment/Antitheft and Alarm Systems/Testing and Inspection/Programming and
Relearning/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. INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)
(a) Disconnect the F37 steering lock ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
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