Power Steering System (For Hatchback) Test Mode Procedure

Steering. Yaris. Ncp93, 131
Power Assist Systems. Yaris. Ncp93, 131

  1. ENTER TEST MODE

  1. CHECK TEST MODE DISPLAY

  1. CHECK VEHICLE SPEED SIGNAL (w/o ABS)

  1. READ TEST MODE CODE

  1. END OF TEST MODE

Power Steering System (For Hatchback) -- Test Mode Procedure


NOTICE:
The torque sensor zero point calibration is performed automatically when the test mode inspection is conducted after the power steering ECU has been replaced with a new one.
HINT:
  1. Speed sensor signals can be checked easily in test mode.
  2. Test mode code C1571 is stored during the transition to test mode. This code does not indicate a malfunction since the code will be cleared when the ECU determines that the sensor is normal.
  3. The test mode code is cleared simultaneously when test mode is terminated.

ENTER TEST MODE

  1. Turn the ignition switch off.

  2. Connect the Techstream to the DLC3.

  3. Start the engine.

  4. Turn the Techstream on.

  5. Enter the following menus: Chassis / EMPS / Utility / Signal Check.


CHECK TEST MODE DISPLAY


    Yaris. Ncp93, 131.Power Assist Systems.Power Steering System (For Sedan).Power Steering System (For Hatchback) Test Mode Procedure

  1. The EPS warning light blinks as shown on the left when test mode is entered.

    NOTICE:
    If the torque sensor zero point calibration has not been performed, the EPS warning comes on until the torque sensor zero point calibration is completed, and shows the test mode blink pattern after the torque sensor zero point calibration is completed.

CHECK VEHICLE SPEED SIGNAL (w/o ABS)


  1. Drive the vehicle until the vehicle speed reaches 10 km/h (6 mph) or more.


    Yaris. Ncp93, 131.Power Assist Systems.Power Steering System (For Sedan).Power Steering System (For Hatchback) Test Mode Procedure


READ TEST MODE CODE

  1. Check the DTCs in test mode.

    Test Mode DTC
    		Test Signal
    		Test Mode DTC Clear Condition
    		Trouble areas
    C1571
    		Vehicle speed check
    		Vehicle speed 10 km/h (6 mph) or more
    		If the DTC cannot be cleared, any of the following areas may be malfunctioning:
    1. Vehicle speed signal circuit
    2. Power steering ECU
    NOTICE:
    Test mode code is cleared when test mode is terminated.

END OF TEST MODE

  1. Return to normal mode by following the instructions on the tester screen.

  2. Turn the ignition switch off and disconnect the tester.