Toyota Yaris: Power Steering System / Power Steering Torque Sensor "B" Supply Voltage Circuit Voltage Above Threshold (C151B17)

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Steering / Power Assist Systems / Power Steering System / Power Steering Torque Sensor "B" Supply Voltage Circuit Voltage Above Threshold (C151B17)

DESCRIPTION

The power steering ECU assembly supplies a voltage of 5 V to the torque sensor (electric power steering column sub-assembly) and monitors the voltage value of the Hall IC inside the torque sensor (electric power steering column sub-assembly) which changes in response to changes in the magnetic flux density (steering torque) detected by the Hall IC, and calculates the assist torque.

While DTC C151B17 is detected, power assist is stopped or assist amount is limited due to fail-safe operation.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Return-to-normal Condition

Note

C151B17

Power Steering Torque Sensor "B" Supply Voltage Circuit Voltage Above Threshold

TRQV2 voltage is 5.6 V or more

  • Torque sensor (Electric power steering column sub-assembly)
  • Power steering ECU assembly

EPS warning light: Comes on

Ignition switch ON again

-

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When the electric power steering column sub-assembly has been replaced, perform Power Steering ECU Initial Setting (assist map writing).

    Click here

  • When the power steering ECU assembly has been replaced, perform Power Steering ECU Initial Setting (assist map writing).

    Click here

PROCEDURE

1.

INSPECT TORQUE SENSOR (ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY) (CHECK FOR SHORT)

(a) Disconnect the z7 power steering ECU assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

z7-3 (TRQV2) - Body ground

Always

10 kΩ or higher

z7-3 (TRQV2) - z7-2 (TRQG2)

Always

10 kΩ or higher

NG

REPLACE ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY

OK

2.

INSPECT POWER STEERING ECU ASSEMBLY (POWER SOURCE OF TORQUE SENSOR)

(a) Start the engine.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

z7-3 (TRQV2) - z7-2 (TRQG2)

Engine running

4.5 to 5.5 V

*a

Component with harness connected

(Power Steering ECU Assembly)

OK

REPLACE ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY

NG

REPLACE POWER STEERING ECU ASSEMBLY

    Power Steering Torque Sensor "A" Supply Voltage Circuit Voltage Above Threshold (C151A17)

    DESCRIPTION The power steering ECU assembly supplies a voltage of 5 V to the torque sensor (electric power steering column sub-assembly) and monitors the voltage value of the Hall IC inside the torque sensor (electric power steering column sub-assembly) which changes in response to changes in the magnetic flux density (steering torque) detected by the Hall IC, and calculates the assist torque...

    Power Steering Motor "A" Supply Voltage Circuit Voltage Below Threshold (C155A16,C155A17,C155B16,C155B17)

    DESCRIPTION If a problem occurs in the system, the power source relay circuit and the motor relay circuit are shut off to stop power assist. The ECU must be replaced when there is a problem with the relays because the relays are built into the ECU...

    Other information:

    Toyota Yaris XP210 (2020-2022) Reapir and Service Manual: Reassembly


    REASSEMBLY PROCEDURE 1. INSTALL SPARK PLUG TUBE HINT: When using a new cylinder head sub-assembly, the spark plug tubes must be replaced. (a) Apply adhesive to a new spark plug tube as shown in the illustration. Adhesive: Toyota Genuine Adhesive 1324, Three Bond 1324 or equivalent Standard Application Width: 1...

    Toyota Yaris XP210 (2020-2022) Reapir and Service Manual: Components


    COMPONENTS ILLUSTRATION *1 BACK DOOR TRIM COVER *2 BACK DOOR TRIM BOARD *3 BACK DOOR OUTSIDE GARNISH SUB-ASSEMBLY - - N*m (kgf*cm, ft.*lbf): Specified torque - - ILLUSTRATION *1 SYMBOL EMBLEM *2 NO. 2 BACK DOOR NAME PLATE *3 NO...

    Categories

    Liftgate/Trunk Lid

    WARNING

    Never allow a person to ride in the luggage compartment/trunk

    Allowing a person to ride in the luggage compartment/trunk is dangerous. The person in the luggage compartment/trunk could be seriously injured or killed during sudden braking or a collision.

    Do not drive with the liftgate/trunk lid open

    read more

     
    Copyright © 2022 www.toyaris4.com