Component Inspection

Check "INPUT SPEED SENSOR" 

1. Ignition "OFF".
2. Disconnect the "INPUT SPEED SENSOR" connector
3. Measure resistance between terminal "1", "2" and "2", "3" and "1", "3" of the "INPUT SPEED SENSOR" connector.
   1. Specification : Refer to "Reference data"
      Fig 1: Measuring Resistance Between Terminal 1, 2 And 3 Of Input Speed Sensor Connector

      Courtesy of HYUNDAI MOTOR CO.
4. Is resistance within specifications?
   INPUT SENSOR SPECIFICATION
   
   

   Data	Reference Data
   Current	22 mA
   Air Gab	Input sensor	1.3 mm
   	Output sensor	0.85 mm
   Resistance	Input sensor	Above 4 MΩ
   	Output sensor	Above 4 MΩ
   Voltage	High	4.8 ~ 5.2V
   	Low	Below 0.8V

   YES

   1. Go to "CHECK PCM/TCM" as below

   NO

   1. Replace "INPUT SPEED SENSOR" as necessary and Go to "VERIFICATION OF VEHICLE REPAIR " procedure

Check PCM/TCM 

1. Ignition "ON" & Engine "OFF".
2. Connect "INPUT SPEED SENSOR" connector.
3. Install scantool and slect a SIMU-SCAN,
4. Simulate frequency to INPUT SPEED SENSOR signal circuit.
   Fig 2: Scantool Display - Simulation Input Speed Sensor Frequency (Input 150Hz)

   Courtesy of HYUNDAI MOTOR CO.
   Fig 3: Scantool Display - Simulation Input Speed Sensor Frequency (Input 250Hz)

   Courtesy of HYUNDAI MOTOR CO.

   * The values are subject to change according to vehicle model or conditions

5. Is "INPUT SPEED SENSOR" signal value changed according to simulation frequency?

   YES

   1. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

   NO

   1. Substitute with a known-good PCM/TCM and check for proper operation. If the problem is corrected, replace PCM/TCM as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.