B2782

STEERING COLUMN: STEERING LOCK SYSTEM: B2782: Power Source Control ECU Malfunction
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 as the steering lock ECU is not connected to the CAN communication system.





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 step 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 (CERTIFICATION ECU)

(a) Check the DTCs Steering Lock System.

OK:

DTC B2782 is output, but DTC B2785 (LIN bus line malfunction) is not output.

NG -- GO TO DTC CHART (B2785) B2785
OK -- Continue to next step.

2. CHECK STEERING LOCK ACTUATOR (IGE VOLTAGE)





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

Standard voltage:





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 -- REPLACE STEERING LOCK ACTUATOR
NG -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR - BODY GROUND)





(a) Disconnect the L33 steering lock actuator connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR - MAIN BODY ECU)





(a) Disconnect the L13 main body ECU connector.

(b) Disconnect the L33 steering lock actuator connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU