Engine Controls - Sensor Operating Range Charts: 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 can cause driveability problems.
NOTE:
Unless stated otherwise in test procedure, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance. If sensor connector has more than 2 terminals, see appropriate SYSTEM & COMPONENT TESTING article for terminal identification.
ACCELERATOR PEDAL POSITION SENSOR RESISTANCE (ES300, IS300, GS300, GS430, LS430 & SC430)
| Application | Terminals | Ohms @ 68°F (20°C) |
|---|---|---|
| ES300 | VCP1 & EP1 | 2250-4750 |
| ..... | VCP2 & EP2 | 2250-4750 |
| IS300 | VC & E2 | 1200-3200 |
| GS300, GS430, LS430 & SC430 | VCP1 & EP1 | 1500-6000 |
| ..... | VCP2 & EP2 | 1500-6000 |
ACCELERATOR PEDAL POSITION SENSOR VOLTAGE (GX470 & LX470)
| Accelerator Pedal Position | Voltage | |
|---|---|---|
| Sensor No. 1 | ||
| Released | .5-1.1 | |
| Depressed | 2.6-4.5 | |
| Sensor No. 2 | ||
| Pedal Released | 1.2-2.0 | |
| Pedal Depressed | 3.4-5.3 | |
AIR/FUEL RATIO SENSOR RESISTANCE (ES300 & RX300)
| Terminal No. | Ohms | |
|---|---|---|
| 1 (HT)-2 (+B) | ||
| Temperature °F (°C) | ||
| 68 (20) | .8-1.4 | |
| 1472 (800) | 1.8-3.2 | |
| 1 (HT)-4(E1) | No Continuity | |
CAMSHAFT POSITION SENSOR RESISTANCE
| Temperature °F (°C) | Ohms |
|---|---|
| 14-122 (-10-50) | 835-1400 |
| 123-212 (51-100) | 1060-1645 |
CAMSHAFT TIMING OIL CONTROL VALVE RESISTANCE
| Application | Ohms @ 68°F (20°C) |
|---|---|
| ES300, GS300, GS430, LS430, RX300 & SC430 | 6.9-7.9 |
| IS300 | 5.5-12.0 |
CRANKSHAFT POSITION SENSOR RESISTANCE
| Temperature °F (°C) | Ohms |
|---|---|
| 14-122 (-10-50) | 1630-2740 |
| 123-212 (51-100) | 2065-3225 |
ENGINE COOLANT TEMPERATURE (ECT) SENSOR
| Temperature °F (°C) | kOhms |
|---|---|
| 68 (20) | 2.32-2.59 |
| 176 (80) | .310-.326 |
KNOCK SENSOR (KS) CONTINUITY
| Measure Continuity Between | Continuity |
|---|---|
| Knock Sensor Terminal & Sensor Body | No |
MASS AIR FLOW METER RESISTANCE
| Temperature °F (°C) | kOhms | |
|---|---|---|
| ES300, GS300, GS430, IS300, LS430, RX300 | ||
| -4 (-20) | 13.6-18.4 | |
| 68 (20) | 2.21-2.69 | |
| 140 (60) | .49-.67 | |
| GX470 & LX470 | ||
| -4 (-20) | 12.5-16.9 | |
| 68 (20) | 2.19-2.67 | |
| 140 (60) | .5-.68 | |
OXYGEN SENSOR HEATER RESISTANCE
| Temperature °F (°C) | Ohms | |
|---|---|---|
| Terminal 1 (HT)-2 (+B) | ||
| 68 (20) | 11-16 | |
| 1472 (800) | 23-32 | |
THROTTLE POSITION SENSOR RESISTANCE
| Application | Terminals | Ohms @ 68°F (20°C) | |||
|---|---|---|---|---|---|
| RX300 (1) | |||||
| Throttle Valve Fully Closed | VTA & E2 | 200-6300 | |||
| Throttle Valve Fully Open | VTA & E2 | 2000-10,200 | |||
| ..... | VC & E2 | 2500-5900 | |||
| ES300 & IS300 | VC & E2 | 1200-3200 | |||
| GS300, GS430, LS430 & SC430 | VC & ETA | 1250-2350 | |||
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VAPOR PRESSURE SENSOR VOLTAGE (GS300, GS430, GX470, IS300, LS430, LX470 & RX300)
| Connection | Voltage |
|---|---|
| VC-E2 | 4.5-5.5 |
VARIABLE VALVE TIMING (VVT) SENSOR RESISTANCE (GS430, LS430 & RX300)
| Temperature °F (°C) | (1) Ohms | ||
|---|---|---|---|
| 14-122 (-10-50) | 835-1400 | ||
| 123-212 (51-100) | 1060-1645 | ||
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