STEERING LOCK SYSTEM Power Source Circuit

DESCRIPTION

This circuit supplies power source voltage from the battery to terminal B of the steering lock ECU.

The diagnosis information of the steering lock ECU is transmitted to the intelligent tester via the certification ECU (smart key ECU assembly) as the steering lock ECU is not connected to the CAN communication system.

WIRING DIAGRAM

A01X3JCE02
*a from Battery
*b STR LOCK
*c Steering Lock Motor
*d Steering Lock Actuator Assembly (Steering Lock ECU)

CAUTION / NOTICE / HINT

Tech Tips

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 FUSE (STR LOCK)


    1. Remove the STR LOCK fuse from the engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      STR LOCK fuse Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

  2. CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - BATTERY)

    A01X2K6E02
    *1 Front view of wire harness connector: (to Steering Lock ECU)

    1. Disconnect the E26 steering lock ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      E26-7 (B) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    A01X41PE02
    *1 Front view of wire harness connector: (to Steering Lock ECU)

    1. Disconnect the E26 steering lock ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E26-1 (GND) - Body ground Always Below 1 Ω
      E26-2 (SGND) - Body ground Always Below 1 Ω

    OK

    GO TO STEERING LOCK SYSTEM (PROBLEM SYMPTOMS TABLE) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR