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 "Reference data"

Fig 1: Measuring Resistance Between Terminal 1, 2 And 2, 3 Of Input Speed Sensor Connector
Courtesy of HYUNDAI MOTOR CO.
Is resistance within specifications?

[REFERENCE DATA]

RESISTANCE SPECIFICATIONS

Data	Reference Data
Current	22 mA
Air Gab	Input sensor	1.3 mm
Air Gab	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:

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 scantool and sleet a SIMU-SCAN,
4. Simulate frequency to INPUT SPEED SENSOR signal circuit.
  
  Fig 2: Scan Tool Data Display - CURRENT DATA
  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 and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.