Component Inspection

Check "INPUT SPEED SENSOR"

Ignition "OFF".
Disconnect the "INPUT SPEED SENSOR" connector.
Measure resistance between terminal "1", "2" and "2", "3" and "1", "3" of the "INPUT SPEED SENSOR" connector.
Specification: Refer to "INPUT SPEED SENSOR REFERENCE DATA "

Fig 1: Measure Resistance Between Terminal 1, 2 & 2, 3 & 1, 3 Of Input Speed Sensor Connector
Courtesy of HYUNDAI MOTOR CO.

Is resistance within specifications?

INPUT SPEED SENSOR REFERENCE DATA

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

YES:

Go to step 2.

NO:

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 scan tool and select a SIMU-SCAN.
4. Simulate frequency to INPUT SPEED SENSOR signal circuit.
  
  Fig 2: Simulating Frequency To INPUT SPEED SENSOR Signal Circuit
  Courtesy of HYUNDAI MOTOR CO.
5. Is "INPUT SPEED SENSOR" signal value changed according to simulation frequency?
  YES:
  - 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:
  - Substitute with a known-good PCM/TCM and check for proper operation. If the problem is corrected, replace PCM/TCM as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.