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" See RESISTANCE REFERENCE .

Fig 1: Measuring Resistance Between Input Speed Sensor Connector Terminals
Courtesy of HYUNDAI MOTOR CO.

Is resistance within specifications?

[REFERENCE DATA]

RESISTANCE REFERENCE

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 " 2CHECK PCM" as below.

NO

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

CHECK PCM
1. Ignition "ON" & Engine "OFF".
2. Connect "INPUT SPEED SENSOR" connector.
3. Install scantool and select a SIMU-SCAN.
4. Simulate frequency to INPUT SPEED SENSOR signal circuit.
  
  Fig 2: Monitor Scantool Data - NT (INPUT SPEED)
  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.