INTRODUCTION
Sensor operating range information can help determine if a sensor is out of calibration. An out-of-calibration sensor may not set a trouble code, but it may cause driveability problems.
Note. See appropriate SELF-DIAGNOSTICS article or SYSTEM & COMPONENT TESTING article for additional sensor testing procedures. Unless stated otherwise in test procedure, perform all tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.
Acceleration/Rough Road Sensor
Start engine and allow to idle. Backprobe acceleration sensor and measure voltage between ground and terminal No. 1. See ACCELERATION/ROUGH ROAD SENSOR VOLTAGE table. Replace acceleration sensor if voltage signal is not as specified.
| Condition | (1) Volts |
|---|
| Accent, Elantra & Tiburon |
| Idling | (Fixed Value) 2.3-2.7 |
| Driving | (Varying Value) 0.5-4.5 |
| (1) Backprobe sensor connector and measure voltage between ground and sensor terminal No. 1. |
| (1) | Backprobe sensor connector and measure voltage between ground and sensor terminal No. 1. |
ACCELERATION/ROUGH ROAD SENSOR VOLTAGE
Camshaft Position (CMP) Sensor
Camshaft position sensor testing requires use of scan tool. See related DTC in appropriate SELF-DIAGNOSTICS article.
Crankshaft Position (CKP) Sensor
| Output Frequency | (1) Specification |
|---|
| Accent |
| Idle RPM | 700-900 Hz |
| 3000 RPM | 2800-3200 Hz |
| Elantra & Tiburon |
| Idle RPM | 600-1000 Hz |
| 3000 RPM | 2700-3300 Hz |
| Sonata | (2) |
| (1) Check using OBD-II compliant scan tool. (2) Information is not available from manufacturer. |
| (1) | Check using OBD-II compliant scan tool. |
| (2) | Information is not available from manufacturer. |
CRANKSHAFT POSITION (CKP) SENSOR SPECIFICATION
Engine Coolant Temperature (ECT) Sensor
To check sensor resistance, turn ignition off. Carefully remove ECT sensor. With sensing portion of ETC sensor immersed in cool water, check resistance as water is heated. To check sensor voltage, backprobe ECT sensor connector or ECM connector terminals during engine operation. See ETC SENSOR SPECIFICATIONS table.
| Temperature °F (°C) | Ohms | (1) Output Voltage |
|---|
| 14 (-10) | 8160-10,740 | (2) |
| 32 (0) | 5180-6600 | 4.05 |
| 68 (20) | 2270-2730 | 3.44 |
| 104 (40) | 1059-1281 | 2.72 |
| 140 (60) | 538-650 | (2) |
| 176 (80) | 298-322 | 1.25 |
| 194 (90) | 219-243 | (2) |
| (1) Backprobe ECT harness connector or ECM harness connector during engine operation. (2) Value is not available from manufacturer. |
| (1) | Backprobe ECT harness connector or ECM harness connector during engine operation. |
| (2) | Value is not available from manufacturer. |
ETC SENSOR SPECIFICATIONS
Fuel Tank Pressure (FTP) Sensor
Start engine and allow to idle at normal operating temperature. Backprobe fuel tank pressure sensor connector terminal. After engine has operated for approximately 20 minutes, measure sensor output voltage between sensor ground and sensor signal terminals. See appropriate wiring diagram in WIRING DIAGRAMS article. See FTP SENSOR OUTPUT VOLTAGE .
| Pressure Psi (kg/cm 2 ) | (1) Output Voltage |
|---|
| 0.36 (-.025) | 0.5 |
| 0.0 (0.0) (2) | 2.5 |
| 0.36 (.025) | 4.5 |
| (1) Check sensor output voltage after engine has operated at idle for approximately 20 minutes. (2) Check with fuel filler cap removed. |
| (1) | Check sensor output voltage after engine has operated at idle for approximately 20 minutes. |
| (2) | Check with fuel filler cap removed. |
FTP SENSOR OUTPUT VOLTAGE
Heated Oxygen Sensor (HO2S)
Testing requires use of OBD-II compliant scan tool. See related DTC in appropriate SELF-DIAGNOSTICS article.
Heated Oxygen Sensor (HO2S) Heater
| Temperature °F (°C) | (1) Ohms |
|---|
| 72 (22) | 1.7-2.5 |
| 752 (400) (2) | 30 or more |
| (1) Check between sensor terminals No. 3 and 4 with ignition off and sensor disconnected. (2) Before checking HO2S heater resistance, operate engine at idle until measured coolant temperature is 176-203°F (80-95°C). |
| (1) | Check between sensor terminals No. 3 and 4 with ignition off and sensor disconnected. |
| (2) | Before checking HO2S heater resistance, operate engine at idle until measured coolant temperature is 176-203°F (80-95°C). |
HEATED OXYGEN SENSOR (HO2S) HEATER RESISTANCE
Intake Air Temperature (IAT) Sensor
| Temperature °F (°C) | (1) Volts |
|---|
| 32 (0) | 3.3-3.7 |
| 68 (20) | 2.4-2.8 |
| 104 (40) | 1.6-2.0 |
| 176 (80) | 0.5-0.9 |
| (1) Backprobe IAT sensor connector and check voltage between IAT terminals No. 1 and 2. |
| (1) | Backprobe IAT sensor connector and check voltage between IAT terminals No. 1 and 2. |
IAT SENSOR TEMPERATURE-TO-VOLTAGE SPECIFICATIONS
Knock Sensor
Before checking knock sensor resistance, ensure sensor is properly mounted. Knock sensor mounting bolt should be tightened to 11-18 ft. lbs. (15-25 N.m).
| Temperature °F (°C) | (1) Ohms |
|---|
| 68 (20) | 5,000,000 |
| (1) Check between sensor terminals with sensor disconnected. |
| (1) | Check between sensor terminals with sensor disconnected. |
KNOCK SENSOR RESISTANCE SPECIFICATIONS
Mass Airflow (MAF) Sensor
Start engine and allow to idle when coolant temperature is 176-203°F (80-95°C). Backprobe connector and measure MAF sensor output voltage between ground and signal circuit. See MASS AIRFLOW SENSOR OUTPUT VOLTAGE table. See appropriate wiring diagram in WIRING DIAGRAMS article.
| Engine Speed | Volts |
|---|
| Accent, Elantra & Tiburon |
| Idle (800 RPM) | 0.7-1.1 |
| 3000 RPM | 1.3-2.0 |
| Sonata |
| Idle (700 RPM) | 0.5 |
| 2000 RPM | 1.0 |
MASS AIRFLOW SENSOR OUTPUT VOLTAGE
Throttle Position (TP) Sensor
- Turn ignition on. Backprobe TP sensor connector and measure signal voltage between ground and sensor signal terminal. See appropriate wiring diagram in WIRING DIAGRAMS article. See «THROTTLE POSITION (TP) SENSOR SPECIFICATIONS»(/hyundai/sonata/iv-1998-2001/remont/sensor-range-charts/#engine-controls-sensor-operating-range-charts) table.
- Turn ignition off. Disconnect TP sensor connector. Measure TP sensor resistance between sensor ground terminal and sensor power supply. Resistance should change smoothly from idle position to wide open throttle position. See appropriate wiring diagram in WIRING DIAGRAMS article. See «THROTTLE POSITION (TP) SENSOR SPECIFICATIONS»(/hyundai/sonata/iv-1998-2001/remont/sensor-range-charts/#engine-controls-sensor-operating-range-charts) table.
| Throttle Position | Specification |
|---|
| Accent, Elantra & Tiburon |
| Standard Value | (1) 700-3000 Ohms |
| Idle Position | (1) 2300-3400 Ohms |
| Idle Position | (2) 0.10-0.88 Volts |
| Open (WOT) | (2) 4.25-4.80 Volts |
| Sonata |
| Standard Value | (3) 3500-6500 Ohms |
| Closed | (4) 0.45-0.55 Volts |
| Open (WOT) | (4) 4.50-5.50 Volts |
| (1) Check between TP sensor terminals No. 2 and 3. (Scheme 1) (2) Backprobe between ground and connected TP sensor terminal No. 1, and measure voltage. (Scheme 1) (3) On 2.4L engine, check between TP sensor terminals No. 1 and 4. (Scheme 2) On 2.5L engine, check between TP sensor terminals No. 2 and 3. (Scheme 1)(4) On 2.4L engine, backprobe between ground and connected TP sensor terminal No. 3, and measure voltage. (Scheme 2) On 2.5L engine, backprobe between ground and connected TP sensor terminal No. 1, and measure voltage. (Scheme 1) |
| (1) | Check between TP sensor terminals No. 2 and 3. (Scheme 1) |
| (2) | Backprobe between ground and connected TP sensor terminal No. 1, and measure voltage. (Scheme 1) |
| (3) | On 2.4L engine, check between TP sensor terminals No. 1 and 4. (Scheme 2) On 2.5L engine, check between TP sensor terminals No. 2 and 3. (Scheme 1) |
| (4) | On 2.4L engine, backprobe between ground and connected TP sensor terminal No. 3, and measure voltage. (Scheme 2) On 2.5L engine, backprobe between ground and connected TP sensor terminal No. 1, and measure voltage. (Scheme 1) |
THROTTLE POSITION (TP) SENSOR SPECIFICATIONS
Scheme 1
Scheme 2
Vehicle Speed Sensor (VSS)
VSS testing requires use of scan tool. See related DTC in appropriate SELF-DIAGNOSTICS article.
