INTRODUCTION
Note. Before using sensor operating range information, check for any related Technical Service Bulletins (TSBs).
Sensor operating range information can help determine if a sensor is out of calibration. An out-of-calibration sensor may not set a diagnostic trouble code, but it may cause driveability problems.
Note. Unless stated otherwise, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.
PRIUS
| WARNING | When performing any inspection or service procedure on this vehicle, ensure following service precautions are followed to prevent personal injury or death due to the extremely high voltage. |
The following service precautions must be followed
Scheme 1
- Ensure ignition is off and ignition key is removed from ignition before performing any inspection or service procedure in engine compartment, as engine may automatically start and shut off when ignition is on and READY light is illuminated. READY light is displayed just above the shift lever position indicator on instrument cluster at center of instrument panel.
- Read all service and warning labels in engine compartment before performing any procedures in engine compartment.
- All high-voltage wiring harness connectors contain Orange connectors. DO NOT touch any wiring harness that contains Orange connectors.
- High-voltage battery and other high-voltage components may be identified by HIGH VOLTAGE caution labels on them. DO NOT touch these components.
- If necessary to inspect or service high-voltage system, ensure ignition is off. Remove service plug and wait at least 5 minutes to ensure high voltage is fully discharged before touching any high-voltage wiring harness, connectors or components. Service plug is located on service plug assembly at driver's side front corner of trunk compartment, near high-voltage battery. (Scheme 1) Ensure service plug is stored in a location in which no one may install service plug while technician is working on the vehicle.
- If necessary to touch any high-voltage wiring harness, connectors or components, ensure service plug is removed and battery voltage or less exists at electrical connector. Use Toyota insulated gloves when touching any high-voltage wiring harness, connectors or components. Ensure insulated gloves are dry and in good condition. Ensure that no holes exist in insulated gloves. Test by applying air to insulated glove before touching any high-voltage wiring harness, connectors or components.
- DO NOT wear any metal objects while working on vehicle which may accidently drop and cause a short circuit.
- If any high-voltage wiring harness connector is disconnected, ensure terminal on wiring harness connector is wrapped with tape to prevent wiring harness connector from contacting any surface.
- If servicing high-voltage system, place sign on roof of vehicle to indicate to other technicians that high-voltage system is being serviced.
Camry 2.4L 4-Cylinder & Camry Solara 2.4L 4-Cylinder
For accelerator pedal position sensor testing procedures, see ACCELERATOR PEDAL POSITION SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - 4-CYLINDER article.
Camry 3.0L V6
For accelerator pedal position sensor testing procedures, see ACCELERATOR PEDAL POSITION SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - V6 & V8 article.
Land Cruiser, Sequoia, Tundra 4.7L V8 & 4Runner
For accelerator pedal position sensor testing procedures, see THROTTLE BODY under IDLE CONTROL SYSTEMS in SYSTEM & COMPONENT TESTING - V6 & V8 article.
MR2 With Sequential Manual Transaxle
There are 2 types of manual transaxles used. Sequential manual transaxle may be identified by the shift lever pattern which consists of "R", "N", "S" and "+" in place of the conventional type shift lever pattern and there is no clutch pedal. This model uses an accelerator pedal position sensor. For accelerator pedal position sensor testing procedures, see THROTTLE BODY under IDLE CONTROL SYSTEMS in SYSTEM & COMPONENT TESTING - 4-CYLINDER article.
| WARNING | Read service precautions before proceeding with service procedure. See SERVICE PRECAUTIONS . |
For accelerator pedal position sensor testing procedures, see ACCELERATOR PEDAL POSITION SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - 4-CYLINDER article.
AIR/FUEL SENSOR
Note. Air/Fuel (A/F) sensor may also be referred to as Air/Fuel (A/F) ratio sensor.
Avalon, Camry, Camry Solara 2.4L 4-Cylinder, Camry Solara 3.0L V6 With A/T, Highlander, RAV4, Sienna, Tacoma, Tundra 3.4L V6 & 4Runner
For Air/Fuel (A/F) sensor testing procedures, see AIR/FUEL SENSOR under ENGINE SENSORS & SWITCHES in appropriate SYSTEM & COMPONENT TESTING article.
AIRFLOW METER
Note. Airflow meter may be referred to as Mass Airflow (MAF) meter.
| WARNING | On Prius, read service precautions before proceeding with service procedure. See SERVICE PRECAUTIONS . |
All Models
For airflow meter terminal identification and testing procedures, see AIRFLOW METER under ENGINE SENSORS & SWITCHES in appropriate SYSTEM & COMPONENT TESTING article. Ensure resistance is within specification in relation to specified temperature. See AIRFLOW METER RESISTANCE table.
| Application & Temperature | Ohms | ||
|---|---|---|---|
| Avalon | |||
| 4°F (-20°C) | 13,600-18,400 | ||
| 68°F (20°C) | 2210-2690 | ||
| 140°F (60°C) | 490-670 | ||
| Camry | |||
| 4°F (-20°C) | 13,600-18,400 | ||
| 68°F (20°C) | 2210-2690 | ||
| 140°F (60°C) | 493-667 | ||
| Camry Solara | |||
| 2.4L 4-Cyl. | |||
| 4°F (-20°C) | 13,600-18,400 | ||
| 68°F (20°C) | 2210-2690 | ||
| 140°F (60°C) | 490-670 | ||
| 3.0L V6 | |||
| 4°F (-20°C) | 14,600-17,800 | ||
| 68°F (20°C) | 2210-2690 | ||
| 140°F (60°C) | 290-350 | ||
| Celica & ECHO | |||
| 4°F (-20°C) | 13,600-18,400 | ||
| 68°F (20°C) | 2210-2690 | ||
| 140°F (60°C) | 490-670 | ||
| Corolla | |||
| 4°F (-20°C) | 13,600-18,400 | ||
| 68°F (20°C) | 2200-2700 | ||
| 140°F (60°C) | 500-700 | ||
| Highlander | |||
| 4°F (-20°C) | 13,600-18,400 | ||
| 68°F (20°C) | 2210-2690 | ||
| 140°F (60°C) | 493-667 | ||
| Land Cruiser | |||
| 4°F (-20°C) | 12,500-16,900 | ||
| 68°F (20°C) | 2190-2670 | ||
| 140°F (60°C) | 500-680 | ||
| MR2, Prius & RAV4 | |||
| 4°F (-20°C) | 13,600-18,400 | ||
| 68°F (20°C) | 2210-2690 | ||
| 140°F (60°C) | 490-670 | ||
| Sequoia | |||
| 4°F (-20°C) | 12,500-16,900 | ||
| 68°F (20°C) | 2190-2670 | ||
| 140°F (60°C) | 500-680 | ||
| Sienna | |||
| 4°F (-20°C) | 13,600-18,400 | ||
| 68°F (20°C) | 2210-2690 | ||
| 140°F (60°C) | 490-670 | ||
| Tacoma | |||
| 2.4L 4-Cyl. & 2.7L 4-Cyl. | |||
| 4°F (-20°C) | 10,000-20,000 | ||
| 32°F (0°C) | 4000-7000 | ||
| 68°F (20°C) | 2000-3000 | ||
| 104°F (40°C) | 900-1300 | ||
| 140°F (60°C) | 400-700 | ||
| 176°F (80°C) | 200-400 | ||
| 3.4L V6 | |||
| 4°F (-20°C) | 13,600-18,400 | ||
| 68°F (20°C) | 2200-2700 | ||
| 140°F (60°C) | 500-700 | ||
| Tundra | |||
| 3.4L V6 | |||
| 4°F (-20°C) | 13,600-18,400 | ||
| 68°F (20°C) | 2200-2700 | ||
| 140°F (60°C) | 500-700 | ||
| 4.7L V8 | |||
| 4°F (-20°C) | 12,500-16,900 | ||
| 68°F (20°C) | 2190-2670 | ||
| 140°F (60°C) | 500-680 | ||
| 4Runner | |||
| 4°F (-20°C) | 13,600-18,400 | ||
| 68°F (20°C) | 2200-2700 | ||
| 140°F (60°C) | 500-700 | ||
AIRFLOW METER RESISTANCE
| WARNING | On Prius, read service precautions before proceeding with service procedure. See SERVICE PRECAUTIONS . |
For camshaft position sensor testing procedures, see CAMSHAFT POSITION SENSOR under IGNITION SYSTEMS in appropriate BASIC DIAGNOSTIC PROCEDURES article. Ensure resistance is within specification. See CAMSHAFT POSITION SENSOR RESISTANCE table.
| Application | Ohms | |||
|---|---|---|---|---|
| Avalon & Camry | ||||
| Cold (1) | 835-1400 | |||
| Hot (2) | 1060-1645 | |||
| Camry Solara | ||||
| 2.4L 4-Cyl. | ||||
| Cold (1) | 835-1400 | |||
| Hot (2) | 1060-1645 | |||
| 3.0L V6 | ||||
| Denso Sensor (3) | ||||
| Cold (1) | 835-1400 | |||
| Hot (2) | 1060-1645 | |||
| Wabash Sensor (3) | ||||
| Cold (1) | 1690-2560 | |||
| Hot (2) | 2145-3010 | |||
| Celica & Corolla | ||||
| Cold (1) | 835-1400 | |||
| Hot (2) | 1060-1645 | |||
| ECHO & Prius | ||||
| Cold (1) | 1630-2740 | |||
| Hot (2) | 2065-3225 | |||
| Highlander, Land Cruiser, MR2, RAV4, Sequoia, Sienna, Tacoma, Tundra & 4Runner | ||||
| Cold (1) | 835-1400 | |||
| Hot (2) | 1060-1645 | |||
| (1) Cold is with temperature of 14-122°F (-10-50°C). (2) Hot is with temperature of 122-212°F (50-100°C). (3) This is manufacturer of camshaft position sensor. | ||||
| (1) | Cold is with temperature of 14-122°F (-10-50°C). |
| (2) | Hot is with temperature of 122-212°F (50-100°C). |
| (3) | This is manufacturer of camshaft position sensor. |
CAMSHAFT POSITION SENSOR RESISTANCE
| WARNING | On Prius, read service precautions before proceeding with service procedure. See SERVICE PRECAUTIONS . |
For crankshaft position sensor testing procedures, see CRANKSHAFT POSITION SENSOR under IGNITION SYSTEMS in appropriate BASIC DIAGNOSTIC PROCEDURES article. Ensure resistance is within specification. See CRANKSHAFT POSITION SENSOR RESISTANCE table.
| Application | Ohms | ||
|---|---|---|---|
| Avalon | |||
| Cold (1) | 1630-2740 | ||
| Hot (2) | 2065-3225 | ||
| Camry & Camry Solara | |||
| 2.4L 4-Cyl. | |||
| Cold (1) | 985-1600 | ||
| Hot (2) | 1265-1890 | ||
| 3.0L V6 | |||
| Cold (1) | 1630-2740 | ||
| Hot (2) | 2065-3225 | ||
| Celica & Corolla | |||
| Cold (1) | 1630-2740 | ||
| Hot (2) | 2065-3225 | ||
| ECHO | |||
| Cold (1) | 985-1600 | ||
| Hot (2) | 1265-1890 | ||
| Highlander | |||
| 2.4L 4-Cyl. | |||
| Cold (1) | 985-1600 | ||
| Hot (2) | 1265-1890 | ||
| 3.0L V6 | |||
| Cold (1) | 1630-2740 | ||
| Hot (2) | 2065-3225 | ||
| Land Cruiser & MR2 | |||
| Cold (1) | 1630-2740 | ||
| Hot (2) | 2065-3225 | ||
| Prius & RAV4 | |||
| Cold (1) | 985-1600 | ||
| Hot (2) | 1265-1890 | ||
| Sequoia, Sienna, Tacoma, Tundra & 4Runner | |||
| Cold (1) | 1630-2740 | ||
| Hot (2) | 2065-3225 | ||
| (1) Cold is with temperature of 14-122°F (-10-50°C). (2) Hot is with temperature of 122-212°F (50-100°C). | |||
| (1) | Cold is with temperature of 14-122°F (-10-50°C). |
| (2) | Hot is with temperature of 122-212°F (50-100°C). |
CRANKSHAFT POSITION SENSOR RESISTANCE
Camry 3.0L V6, Camry Solara 3.0L V6 & Tacoma 2.7L 4-Cylinder 3RZ-FE
For EGR gas temperature sensor testing procedures, see EGR GAS TEMPERATURE SENSOR under ENGINE SENSORS & SWITCHES in appropriate SYSTEM & COMPONENT TESTING article. Ensure resistance is within specification in relation to specified temperature. See EGR GAS TEMPERATURE SENSOR RESISTANCE table.
| Application & Temperature | Ohms | |
|---|---|---|
| Camry | ||
| 122°F (50°C) | 69,400-88,500 | |
| 212°F (100°C) | 11,890-14,370 | |
| 302°F (150°C) | 2790-3590 | |
| Camry Solara & Tacoma | ||
| 122°F (50°C) | 64,000-97,000 | |
| 212°F (100°C) | 11,000-16,000 | |
| 302°F (150°C) | 2000-4000 | |
EGR GAS TEMPERATURE SENSOR RESISTANCE
Camry 3.0L V6 & Camry Solara 3.0L V6
For EGR position sensor testing procedures, see EGR POSITION SENSOR (CAMRY & CAMRY SOLARA) under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING - V6 & V8 article.
| WARNING | On Prius, read service precautions before proceeding with service procedure. See SERVICE PRECAUTIONS . |
For Engine Coolant Temperature (ECT) sensor location and testing procedures, see ENGINE COOLANT TEMPERATURE SENSOR under ENGINE SENSORS & SWITCHES in appropriate SYSTEM & COMPONENT TESTING article. Ensure resistance is within specification in relation to specified temperature. (Scheme 2)
Scheme 2
| WARNING | On Prius, read service precautions before proceeding with service procedure. See SERVICE PRECAUTIONS . |
For heated oxygen sensor application and sensor testing procedures, see HEATED OXYGEN SENSOR under ENGINE SENSORS & SWITCHES in appropriate SYSTEM & COMPONENT TESTING article.
| WARNING | On Prius, read service precautions before proceeding with service procedure. See SERVICE PRECAUTIONS . |
Intake air temperature sensor is incorporated in to airflow meter. For testing procedures, see AIRFLOW METER under ENGINE SENSORS & SWITCHES in appropriate SYSTEM & COMPONENT TESTING article.
| WARNING | On Prius, read service precautions before proceeding with service procedure. See SERVICE PRECAUTIONS . |
For knock sensor testing procedures, see KNOCK SENSOR under ENGINE SENSORS & SWITCHES in appropriate SYSTEM & COMPONENT TESTING article.
POWER STEERING PRESSURE SENSOR
Note. Power steering pressure sensor may also be referred to as power steering oil pressure sensor.
ECHO
Power steering pressure sensor is located on side of power steering pump. Testing information is not available from manufacturer.
For Throttle Position (TP) sensor terminal identification and testing procedures, see THROTTLE POSITION SENSOR under ENGINE SENSORS & SWITCHES in appropriate SYSTEM & COMPONENT TESTING article.
| WARNING | Read service precautions before proceeding with service procedure. See SERVICE PRECAUTIONS . |
For vacuum sensor testing procedures, se VACUUM SENSOR FOR HYDROCARBON ADSORBER CATALYST SYSTEM under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - 4-CYLINDER article.
| WARNING | On Prius, read service precautions before proceeding with service procedure. See SERVICE PRECAUTIONS . |
For vapor pressure sensor testing procedures, see VAPOR PRESSURE SENSOR under FUEL EVAPORATIVE SYSTEM under EMISSION SYSTEMS & SUB-SYSTEMS in appropriate SYSTEM & COMPONENT TESTING article.
VARIABLE VALVE TIMING SENSOR
Note. Variable Valve Timing (VVT) sensor may also be referred to as camshaft position sensor.
| WARNING | On Prius, read service precautions before proceeding with service procedure. See SERVICE PRECAUTIONS . |
Avalon, Camry 2.4L 4-Cylinder, Camry Solara 2.4L 4-Cylinder, Celica, Corolla, ECHO, Highlander, MR2, Prius, RAV4 & Sienna
For Variable Valve Timing (VVT) sensor testing procedures, see CAMSHAFT POSITION SENSOR under IGNITION SYSTEMS in appropriate BASIC DIAGNOSTIC PROCEDURES article.
Camry 2.4L 4-Cylinder, Camry Solara, Celica, Corolla, ECHO, Tacoma, Land Cruiser, Sequoia & Tundra
For vehicle speed sensor testing procedures, see VEHICLE SPEED SENSOR under ENGINE SENSORS & SWITCHES in appropriate SYSTEM & COMPONENT TESTING article.
See also:
• SERVICE PRECAUTIONS