Home › Steering › Steering Column › STEERING LOCK SYSTEM
Last Modified: 11-27-2007 1.6 C
Service Category: Steering Section: Steering Column
Model Year: 2008 Model: LX570 Doc ID: RM000001T1F00BX
Title: STEERING COLUMN: STEERING LOCK SYSTEM: DESCRIPTION (2008 LX570)

DTC

B2782

Power Source Control ECU Malfunction

DESCRIPTION

The steering lock ECU activates the steering lock motor by the power from the main body ECU through the IGE circuit. This prevents the steering from being locked while the vehicle is moving.

The diagnosis information of the steering lock ECU is transmitted to the Techstream 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

B2782

An IGE power supply circuit malfunction.
  • Steering lock actuator assembly (steering lock ECU)
  • Main body ECU
  • Harness or connector

WIRING DIAGRAM

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.

PROCEDURE

1.

CHECK DTC OUTPUT (B2785)

(a) Check for DTCs STEERING COLUMN: STEERING LOCK SYSTEM: DTC CHECK / CLEAR (2008 LX570) .

OK:

DTC B2782 is output, but DTC B2785 is not output.

OK

2.

INSPECT STEERING LOCK ECU


(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

E26-3 (IGE) - E26-1 (GND)
  • Engine switch on (IG)
  • Steering lock motor operating

Below 1 V

E26-3 (IGE) - E26-1 (GND)
  • Engine switch on (IG)
  • Steering lock motor not operating

11 to 14 V

HINT:

When the steering lock is activated and the engine switch is turned on (IG), the steering lock motor activates to release the steering lock. The motor operation occurs for 2 to 15 seconds.

OK

4.

CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - MAIN BODY ECU AND BODY GROUND)


(a) Disconnect the E26 steering lock ECU connector.

(b) Disconnect the E1 main body ECU connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

E26-3 (IGE) - E1-19 (SLR+)

Always

Below 1 Ω

E26-1 (GND) - Body ground

Always

Below 1 Ω

E26-3 (IGE) or E1-19 (SLR+) - Body ground

Always

10 kΩ or higher
OK