Power Steering System (Diagnostics - Introduction): Other Scion tC II рестайлинг

PRECAUTION [05/2013 - 01/2014]

1. EXPRESSIONS OF IGNITION SWITCH HINT: The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this Service Information. Expression Switch Type Ignition Switch (Position) Engine Switch (Condition) Ignition switch off LOCK Off Ignition switch ON ON On (IG) Ignition switch ACC ACC On (ACC) Engine start START Start
2. PRECAUTION FOR DISCONNECTING BATTERY CABLE NOTE: When disconnecting the cable from the negative (-) battery terminal, some systems need to be initialized after the cable is reconnected. Refer to «INITIALIZATION [05/2013 - 01/2014]»(ref-615109-S22240423792014050900000) .
3. HANDLING PRECAUTIONS FOR SRS AIRBAG SYSTEM The vehicle is equipped with a Supplemental Restraint System (SRS). Failure to carry out service operations in the correct sequence could cause the SRS to unexpectedly deploy during servicing. This may cause a serious accident. Before servicing (including inspection, replacement, removal and installation of parts), be sure to read the precautionary notices for the Supplemental Restraint System. Refer to «PRECAUTION [05/2013 - 01/2014]»(ref-615289-S06154869092014050900000) .
4. PRECAUTIONS FOR REMOVAL, INSTALLATION AND REPLACEMENT OF ELECTRONIC POWER STEERING COMPONENTS After replacing the power steering ECU assembly or steering column assembly, clear the rotation angle sensor calibration value, initialize the rotation angle sensor and calibrate the torque sensor zero point. Refer to «CALIBRATION [05/2013 - ]»(ref-615122-S16222205482014050900000) .
5. HANDLING PRECAUTION When handling the electronic parts: Do not subject electronic parts such as ECUs and relays to shocks. Replace parts with new ones if dropped or subjected to a severe blow. Do not expose any electronic parts to high temperatures or humidity. In order to prevent deformation or malfunctions due to static electricity, do not touch the connector terminals. Before disconnecting the connectors related to the electronic power steering system, turn the ignition switch to ON, center the steering wheel, and then turn the ignition switch off.
6. PRECAUTIONS FOR CAN COMMUNICATION CAN communication lines are used to receive information from the skid control ECU and ECM, and to transmit warnings to the combination meter. When there are any problems in the CAN communication lines, DTCs of the CAN communication line are stored. Perform troubleshooting for the communication line problems when CAN communication DTCs are stored. Be sure to start troubleshooting of the power steering system after confirming that the CAN communication system is normal. Since the CAN communication line has a certain length and route, it cannot be repaired temporarily with a bypass wire, etc.

PRECAUTION [01/2014 - ]

1. EXPRESSIONS OF IGNITION SWITCH HINT: The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this Service Information. Expression Switch Type Ignition Switch (Position) Engine Switch (Condition) Ignition switch off LOCK Off Ignition switch ON ON On (IG) Ignition switch ACC ACC On (ACC) Engine start START Start
2. PRECAUTION FOR DISCONNECTING BATTERY CABLE NOTE: When disconnecting the cable from the negative (-) battery terminal, some systems need to be initialized after the cable is reconnected. Refer to «INITIALIZATION [01/2014 - ]»(ref-615109-S31931454042014050900000) .
3. HANDLING PRECAUTIONS FOR SRS AIRBAG SYSTEM The vehicle is equipped with a Supplemental Restraint System (SRS). Failure to carry out service operations in the correct sequence could cause the SRS to unexpectedly deploy during servicing. This may cause a serious accident. Before servicing (including inspection, replacement, removal and installation of parts), be sure to read the precautionary notices for the Supplemental Restraint System. Refer to «PRECAUTION [01/2014 - ]»(ref-615289-S05356892732014050900000) .
4. PRECAUTIONS FOR REMOVAL, INSTALLATION AND REPLACEMENT OF ELECTRONIC POWER STEERING COMPONENTS After replacing the power steering ECU assembly or steering column assembly, clear the rotation angle sensor calibration value, initialize the rotation angle sensor and calibrate the torque sensor zero point. Refer to «CALIBRATION [05/2013 - ]»(ref-615122-S16222205482014050900000) .
5. HANDLING PRECAUTION When handling the electronic parts: Do not subject electronic parts such as ECUs and relays to shocks. Replace parts with new ones if dropped or subjected to a severe blow. Do not expose any electronic parts to high temperatures or humidity. In order to prevent deformation or malfunctions due to static electricity, do not touch the connector terminals. Before disconnecting the connectors related to the electronic power steering system, turn the ignition switch to ON, center the steering wheel, and then turn the ignition switch off.
6. PRECAUTIONS FOR CAN COMMUNICATION CAN communication lines are used to receive information from the skid control ECU and ECM, and to transmit warnings to the combination meter. When there are any problems in the CAN communication lines, DTCs of the CAN communication line are stored. Perform troubleshooting for the communication line problems when CAN communication DTCs are stored. Be sure to start troubleshooting of the power steering system after confirming that the CAN communication system is normal. Since the CAN communication line has a certain length and route, it cannot be repaired temporarily with a bypass wire, etc.

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Scheme 5

FREEZE FRAME DATA [05/2013 - ]

1. FREEZE FRAME DATA NOTE: Freeze frame data values will vary depending on the measurement conditions, surroundings and vehicle conditions. For this reason, there may be a problem even when the values are within the specifications. Turn the ignition switch to ON and park the vehicle on level ground. Check the freeze frame data by using the Techstream. Turn the ignition switch off. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Check the freeze frame data on the Techstream. EMPS Tester Display Measurement/Range Normal Condition Diagnostic Note Meter Vehicle Velocity Vehicle speed from meter/ Min.: 0.0 km/h (0 mph) Max.: 300.0 km/h (186.4 mph) 0 km/h (0 mph) The vehicle is stopped. No significant fluctuation The vehicle is driven at a constant speed. Engine Revolution Engine speed/ Min.: 0 rpm Max.: 12800 rpm No significant fluctuation The engine is running at a constant speed. Motor Actual Current Amount of current to motor/ Min.: -327.68 A Max.: 327.67 A Value changes in proportion to steering effort The engine is running and steering wheel is being turned. Command Value Current Amount of current requested for motor/ Min.: -327.68 A Max.: 327.67 A Value changes in proportion to steering effort The engine is running and steering wheel is being turned. Steering Angle Velocity Steering angle speed/ Min.: -32768 deg/s Max.: 32767 deg/s Value changes in proportion to steering effort The engine is running and steering wheel is being turned. Thermistor Temperature ECU substrate temperature/ Min.: -50.0°C (-58°F) Max.: 150.0°C (302°F) - Ignition switch ON PIG Power Supply Power source voltage for motor activation/ Min.: 0.0000 V Max.: 20.1531 V 11 to 14 V The engine is running and power steering is operating. IG Power Supply ECU power source voltage/ Min.: 0.0000 V Max.: 20.1531 V 11 to 14 V Ignition switch ON Steering Wheel Torque Steering wheel torque/ Min.: -7.00 Nm Max.: 7.00 Nm Value changes in proportion to steering effort The engine is running and steering wheel is being turned. Motor Rotation Angle Motor rotation angle/ Min.: 0.000 deg Max.: 360.000 deg During steering operation, motor rotation angle value changes from 0 to 360° The engine is running and steering wheel is being turned. Command Val Current 2 Amount of current demanded by motor 2/ Min.: -327.68 A Max.: 327.67 A Value changes in proportion to steering effort The engine is running and steering wheel is being turned. PIG2 Voltage Rear pressurization voltage of coil/ Min.: 0.000 V Max.: 98.000 V Approximately 27 V The engine is running and steering wheel is not being turned. Value changes within 4 to 35 V range The engine is running and steering wheel is being turned. Motor Voltage Motor power supply voltage/ Min.: 0.000 V Max.: 98.000 V Approximately 27 V The engine is running and steering wheel is not being turned. Value changes within 4 to 35 V range The engine is running and steering wheel is being turned. Motor Terminal Volt(U) Motor terminal voltage (U phase)/ Min.: 0.000 V Max.: 98.000 V Value changes within 4 to 35 V range The engine is running and steering wheel is being turned. Motor Terminal Volt(V) Motor terminal voltage (V phase)/ Min.: 0.000 V Max.: 98.000 V Value changes within 4 to 35 V range The engine is running and steering wheel is being turned. Motor Terminal Volt(W) Motor terminal voltage (W phase)/ Min.: 0.000 V Max.: 98.000 V Value changes within 4 to 35 V range The engine is running and steering wheel is being turned. Torque Sensor 1 Output Torque sensor 1 output value/ Min.: 0.0000 V Max.: 4.9725 V 2.3 to 2.7 V The engine is running and steering wheel is not turned (no load). 2.5 to 3.8 V The engine is running and steering wheel is turned to right with vehicle stopped. 1.2 to 2.5 V The engine is running and steering wheel is turned to left with vehicle stopped. Torque Sensor 2 Output Torque sensor 2 output value/ Min.: 0.0000 V Max.: 4.9725 V 2.3 to 2.7 V The engine is running and steering wheel is not turned (no load). 1.2 to 2.5 V The engine is running and steering wheel is turned to right with vehicle stopped. 2.5 to 3.8 V The engine is running and steering wheel is turned to left with vehicle stopped. TRQ1 Zero Point Value Torque sensor 1 zero point voltage/ Min.: 0.0000 V Max.: 4.9725 V Value differs depending on vehicle The engine is running and steering wheel is not being turned. TRQ2 Zero Point Value Torque sensor 2 zero point voltage/ Min.: 0.0000 V Max.: 4.9725 V Value differs depending on vehicle The engine is running and steering wheel is not being turned. PS Assist Signal Power steering assist signal/ ON or OFF OFF The engine is not running. ON The engine is running.

FAIL-SAFE CHART [05/2013 - ]

If a problem occurs in the power steering system, the power steering warning light will come on in the combination meter and the power steering assist will be stopped, locked at a particular point, or decreased to protect the system.

POWER STEERING SYSTEM

HINT

1. *1: A DTC is stored while the engine is running.
2. *2: A DTC is stored before the engine is started.
3. The amount of power assist may be decreased to prevent the motor and ECUs from overheating if the steering wheel is continuously turned when the vehicle is either stopped or driven at a low speed, or if the steering wheel is kept at either full lock position for a long time. In such cases, the amount of power assist returns to normal if the steering wheel is not turned for approximately 10 minutes with the engine idling.
4. If the battery is not sufficiently charged or the voltage decreases temporarily, the amount of power assist will be reduced and the power steering warning light will come on. In such cases, the amount of power assist returns to normal when the battery voltage recovers.