Section 44 (Engine Controls - Sensor Operating Range Charts): Introduction
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2003 Lexus SC 430, 2003 Lexus RX 300, 2003 Lexus LX 470, 2003 Lexus LS 430, and 2003 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.
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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