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Home › Hyundai › 2004 › Sonata GL, 2.4 S, Automatic › Repair and Diagnosis › Transmission › Automatic Trans › Automatic Transaxle System › Automatic Transaxle System › Basic Inspection Item Adjustment › A/T Control Component Check

A/T Control Component Check

  1. THROTTLE POSITION SENSOR CHECK

    The TP Sensor is a variable resistor type that rotates with the throttle body shaft to sense the throttle valve angle. As the throttle shaft rotates, the output voltage of the TP Sensor changes. The ECM detects the throttle valve opening based on voltage change. Refer to THROTTLE POSITION (TP) SENSOR .

    Fig 1: Identifying Throttle Position Sensor Connector
    G00753699Courtesy of HYUNDAI MOTOR CO.
  2. OIL TEMPERATURE SENSOR CHECK
    1. Remove the oil temperature sensor.
    2. Measure the resistance between terminals No. 1 and No. 2 of the oil temperature sensor connector.
      3. Fig 2: Oil Temperature Sensor Standard Value Table
      G00753700Courtesy of HYUNDAI MOTOR CO.
      Fig 3: Checking Oil Temperature Sensor
      G00753701Courtesy of HYUNDAI MOTOR CO.
  3. VEHICLE SPEED SENSOR CHECK
    1. Remove the vehicle speed sensor and connect a 3-10 k/ohms resistance as shown in the illustration.
    2. Turn the shaft of the vehicle speed sensor and check that there is voltage between terminals 1-2 (1 turn = 4 pulses).
    Fig 4: Checking Vehicle Speed Sensor
    G00753702Courtesy of HYUNDAI MOTOR CO.
  4. A/T CONTROL RELAY CHECK
    1. Remove the A/T control relay.
    2. Use jumper wires to connect A/T control relay terminal (2) to the battery(+) terminal and terminal (4) to the battery(-) terminal.
    3. Check the continuity between terminal (1) and terminal (3) of the A/T control relay when the jumper wires are connected to and disconnected from the battery.
    4. If there is a problem, replace the A/T control relay.
    Fig 5: A/T Control Relay Continuity Table
    G00753703Courtesy of HYUNDAI MOTOR CO.
    Fig 6: Checking A/T Control Relay Continuity
    G00753704Courtesy of HYUNDAI MOTOR CO.
  5. SOLENOID VALVE CHECK
    1. Remove the valve body cover.
    2. Disconnect the connectors of each solenoid valve.
      Fig 7: Identifying Solenoids
      G00753705Courtesy of HYUNDAI MOTOR CO.
    3. Measure the resistance between terminals 1 and 2 of each solenoid valve.
      Fig 8: Solenoid Standard Value Table
      G00753706Courtesy of HYUNDAI MOTOR CO.
      Fig 9: Checking Solenoid Resistance
      G00753707Courtesy of HYUNDAI MOTOR CO.
    4. If the resistance is outside the standard value, replace the solenoid valve.
      NOTE: Resistance of the solenoid valve connector.
    Fig 10: Resistance Of Solenoid Valve Connector
    G00753708Courtesy of HYUNDAI MOTOR CO.
    Fig 11: Identifying Solenoid Connector Terminals
    G00753709Courtesy of HYUNDAI MOTOR CO.
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