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.
SENSOR OPERATING SPECIFICATIONS
Note. Unless stated otherwise in testing procedure, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.
AIRFLOW METER
| Application & Terminals (1) | Ohms | ||
|---|---|---|---|
| 3.0L | |||
| E2 & VC | 200-400 | ||
| E2 & THA | |||
| 4°F (20°C) | 10,000-20,000 | ||
| 32°F (0°C) | 4000-7000 | ||
| E1 & FC | |||
| Measuring Plate Fully Closed | Infinite | ||
| Measuring Plate Other Than Closed | 0 | ||
| E2 & VS | |||
| Measuring Plate Fully Closed | 200-600 | ||
| Measuring Plate Fully Opened | 20-1200 | ||
| (1) For terminal identification and testing, see I - SYS/COMP TESTS article in this section. | |||
| (1) | For terminal identification and testing, see I - SYS/COMP TESTS article in this section. |
AIRFLOW METER RESISTANCE
AIR TEMPERATURE SENSOR
Air temperature sensor may be referred to as intake air temperature sensor.
2.2L
Air temperature sensor is located in air intake, near air filter. Measure resistance between sensor terminals. For resistance specifications (Scheme 1)
All Others
Air temperature sensor is an integral part of airflow meter. Check resistance at terminals E2 and THA of airflow meter. See the AIRFLOW METER RESISTANCE table.
Scheme 1
COLD START INJECTOR TIME SWITCH
| Terminals | Temperature: °F (°C) | Ohms | |
|---|---|---|---|
| 3.0L | |||
| STA & STJ | Less Than 59 (15) | 25-45 | |
| " | Greater Than 86 (30) | 65-85 | |
| STA & Ground | N/A | 25-85 | |
| (1) For terminal identification and testing, see I - SYS/COMP TESTS article in this section. | |||
| (1) | For terminal identification and testing, see I - SYS/COMP TESTS article in this section. |
COLD START INJECTOR TIME SWITCH RESISTANCE (1)
COOLANT TEMPERATURE SENSOR
Measure coolant temperature sensor resistance between sensor terminals. For resistance specifications see scheme 2
EGR GAS TEMPERATURE SENSOR
| Temperature °F (°C) | Ohms |
|---|---|
| 122 (50) | 69-89 |
| 212 (100) | 11-15 |
| 302 (150) | 2-4 |
| (1) For terminal identification and testing, see the SYSTEM/COMPONENT TESTS article in this section. | |
| (1) | For terminal identification and testing, see the SYSTEM/COMPONENT TESTS article in this section. |
EGR GAS TEMPERATURE SENSOR RESISTANCE (1)
MANIFOLD ABSOLUTE PRESSURE SENSOR
Note. See VACUUM SENSOR at end of article.
OXYGEN (O2) SENSOR
| Application | Specification |
|---|---|
| Camry 3.0L | 11.7-14.3 Ohms @ 68°F (20°C) |
| All Others | 5.1-6.3 Ohms @ 68°F (20°C) |
| (1) Measure resistance between sensor terminals +B and HT. For terminal identification, see SYSTEM/COMPONENT TESTS article in this section. | |
| (1) | Measure resistance between sensor terminals +B and HT. For terminal identification, see SYSTEM/COMPONENT TESTS article in this section. |
O2 SENSOR HEATER RESISTANCE (1)
THROTTLE POSITION SENSOR (TPS)
| Clearance: In. (mm) (1) | Terminal (2) | Ohms | |
|---|---|---|---|
| 2.2L (3) | |||
| 0 (0) | VTA & E2 | 200-5700 | |
| .020 (.51) | IDL & E2 | 2300 Or Less | |
| .028 (.71) | IDL & E2 | Infinite | |
| Fully Open | VTA & E2 | 2000-10,200 | |
| " | VC & E2 | 2500-5900 | |
| 3.0L (3) | |||
| 0 (0) | VTA & E2 | 280-6400 | |
| .014 (.36) | IDL & E2 | 500 Or Less | |
| .028 (.71) | IDL & E2 | Infinite | |
| Fully Open | VTA & E2 | 2000-11,600 | |
| " | VC & E2 | 2700-7700 | |
| (1) Clearance is between throttle lever and throttle stop screw. (2) For terminal identification and testing, see the SYSTEM/COMPONENT TESTS article in this section. (3) Apply vacuum to throttle opener before checking TPS. | |||
| (1) | Clearance is between throttle lever and throttle stop screw. |
| (2) | For terminal identification and testing, see the SYSTEM/COMPONENT TESTS article in this section. |
| (3) | Apply vacuum to throttle opener before checking TPS. |
THROTTLE POSITION SENSOR RESISTANCE
VACUUM SENSOR
Note. Vacuum sensor may also be referred to as Manifold Absolute Pressure (MAP) sensor. Vacuum sensor is used on 2.2L.
| Application | (1) Volts |
|---|---|
| 2.2L | 4.75-5.25 |
| (1) If supply voltage is not within specification, check wiring circuit. | |
| (1) | If supply voltage is not within specification, check wiring circuit. |
VACUUM SENSOR SUPPLY VOLTAGE
| Vacuum: In. Hg | Volts |
|---|---|
| 3.94 | .3-.5 |
| 7.87 | .7-.9 |
| 11.81 | 1.1-1.3 |
| 15.75 | 1.5-1.7 |
| 19.69 | 1.9-2.1 |
VACUUM SENSOR OUTPUT VOLTAGE DROP
See also:
• AIRFLOW METER RESISTANCE
• VACUUM SENSOR