Electric Steering Lock Steering Lock Motor Drive Power Circuit

Steering. Lexus Is250, Is220D. Gse20 Ale20
Steering Column. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK VEHICLE CONDITION

READ VALUE OF INTELLIGENT TESTER

INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)

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

CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - POWER SOURCE CONTROL ECU)

INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)

CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - POWER SOURCE CONTROL ECU)

ELECTRIC STEERING LOCK - Steering Lock Motor Drive Power Circuit


DESCRIPTION

The steering lock ECU is connected to the power source control ECU and certification ECU. The steering lock ECU cannot activate the motor unless it receives permission signals from both the ECUs. (The power source control ECU permits the steering lock ECU to supply power to activate the motor.)

WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.Steering Column.Steering System.Electric Steering Lock Steering Lock Motor Drive Power Circuit


INSPECTION PROCEDURE

1.CHECK VEHICLE CONDITION

  1. Check the problem symptom of the steering lock system.

    Result:

    Condition
    		Proceed to
    Steering lock cannot be released
    		A
    Steering cannot be locked
    		B


B
Go to step 6
A


2.READ VALUE OF INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG), and turn the intelligent tester on.

  1. Select the item below in the DATA LIST, and read its value displayed on the intelligent tester.

    Entry & Start:
    Item
    		Measurement Item / Range (Display)
    		Normal Condition
    Lock/Unlock Receive
    		Steering lock command reception record/YES or NO
    		YES: Steering lock/unlock signal received
    NO: Steering lock/unlock signal not received

  1. Check if steering unlock command reception is confirmed.

    OK:
    "YES" is displayed on the tester display.


NG
CHECK ENTRY AND START SYSTEM
OK


3.INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)


    Lexus Is250, Is220D. Gse20 Ale20.Steering Column.Steering System.Electric Steering Lock Steering Lock Motor Drive Power Circuit

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

    Standard voltage:
    Tester connection
    (Symbols)
    		Condition
    		Specified condition
    J29-3 (IGE) - J29-1 (GND)
    1. Engine switch off
    2. Turn the engine switch on (ACC or IG)
    1. Motor activated: Below 1 V
    2. Motor not activated:
      10 to 12 V


OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG


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


    Lexus Is250, Is220D. Gse20 Ale20.Steering Column.Steering System.Electric Steering Lock Steering Lock Motor Drive Power Circuit

  1. Disconnect the J29 connector from the steering lock actuator assembly.

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

    Standard resistance:
    Tester connection
    (Symbols)
    		Condition
    		Specified condition
    J29-1 (GND) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - POWER SOURCE CONTROL ECU)


    Lexus Is250, Is220D. Gse20 Ale20.Steering Column.Steering System.Electric Steering Lock Steering Lock Motor Drive Power Circuit

  1. Disconnect the J55 connector from the power source control ECU.

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

    Standard resistance:
    Tester connection
    (Symbols)
    		Condition
    		Specified condition
    J29-3 (IGE) - J55-32 (SLR+)
    		Always
    		Below 1 Ω
    J29-3 (IGE) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE POWER SOURCE CONTROL ECU

6.INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)


    Lexus Is250, Is220D. Gse20 Ale20.Steering Column.Steering System.Electric Steering Lock Steering Lock Motor Drive Power Circuit

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

    Standard voltage:
    Tester connection
    (Symbols)
    		Condition
    		Specified condition
    J29-3 (IGE) - J29-1 (GND)
    		Specified condition is checked after performing the following:
    1. Shift the shift lever to the P position
    2. Turn the engine switch off
    3. Open the driver's door
    1. Motor activated: Below 1 V
    2. Motor not activated:
      10 to 12 V


OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG


7.CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - POWER SOURCE CONTROL ECU)


    Lexus Is250, Is220D. Gse20 Ale20.Steering Column.Steering System.Electric Steering Lock Steering Lock Motor Drive Power Circuit

  1. Disconnect the J29 connector from the steering lock actuator assembly.

  1. Disconnect the J55 connector from the power source control ECU.

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

    Standard resistance:
    Tester connection
    (Symbols)
    		Condition
    		Specified condition
    J29-3 (IGE) - J55-32 (SLR+)
    		Always
    		Below 1 Ω
    J29-3 (IGE) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE POWER SOURCE CONTROL ECU