Toyota Yaris: Power Steering Ecu / Removal

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Steering / Power Assist Systems / Power Steering Ecu / Removal

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during the power steering ECU assembly removal/installation are shown below.

Necessary Procedures After Parts Removed/Installed/Replaced

Replaced Part or Performed Procedure

Necessary Procedure

Effect/Inoperative Function when Necessary Procedure not Performed

Link

Power steering ECU assembly

Assist map writing

  • DTCs are stored
  • EPS warning light illuminates

Update ECU security key

Vehicle control history (RoB) are stored

HINT:

When the cable is disconnected/reconnected to the auxiliary battery terminal, systems temporarily stop operating. However, each system has a function that completes learning the first time the system is used.

  • Learning completes when vehicle is driven

    Effect/Inoperative Function When Necessary Procedures are not Performed

    Necessary Procedures

    Link

    Lane tracing assist system

    Drive the vehicle straight ahead at 35 km/h (22 mph) or more for 5 second or more.

    Pre-collision system

    Stop and start system

    Drive the vehicle until stop and start control is permitted (approximately 5 to 60 minutes)

  • Learning completes when vehicle is operated normally

    Effect/Inoperative Function When Necessary Procedures are not Performed

    Necessary Procedures

    Link

    Power door lock control system

    • Back door opener

    Perform door unlock operation with door control switch or electrical key transmitter sub-assembly switch.

    Air conditioning system

    After the ignition switch is turned to ON, the servo motor standard position is recognized.

    -

PROCEDURE

1. REMOVE STEERING COLUMN ASSEMBLY

Click here

2. REMOVE STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY

Click here

3. REMOVE POWER STEERING ECU ASSEMBLY

NOTICE:

  • Do not drop the power steering ECU assembly, strike it with tools or subject it to impacts.
  • If the power steering ECU assembly is subjected to an impact, replace it with a new one.
  • Do not pull the wire harness of the electric power steering column sub-assembly.
  • Do not allow any moisture to come into contact with the power steering ECU assembly.
  • Do not loosen any bolts not mentioned in the procedure.
  • Do not allow any foreign matter to contaminate the power steering ECU assembly.

(a) Disconnect the connector.

(b) Remove the 2 bolts and power steering ECU assembly from the electric power steering column sub-assembly.

4. REMOVE ELECTRIC POWER STEERING MOTOR SHAFT DAMPER

(a) Remove the electric power steering motor shaft damper from the electric power steering column sub-assembly.

    Power Steering Ecu

    ..

    Installation

    INSTALLATION CAUTION / NOTICE / HINT NOTICE: After performing the update ECU security key procedure, make sure to perform the initialization procedure for when the cable has been disconnected and reconnected to the negative (-) auxiliary battery terminal...

    Other information:

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    Categories

    Turning the Engine Off

    Stop the vehicle completely. Manual transaxle: Shift into neutral and set the parking brake.

    Automatic transaxle: Shift the selector lever to the P position and set the parking brake.

    Press the push button start to turn off the engine. The ignition position is off.

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