Двигатель. COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
Система Управления Двигателем 1Nd-Tv. COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
INSPECT SUPPLY PUMP ASSEMBLY (FUEL TEMPERATURE SENSOR)
CHECK HARNESS AND CONNECTOR (FUEL TEMPERATURE SENSOR - ECM)
DTC P0182 Fuel Temperature Sensor "A" Circuit Low Input |
DTC P0183 Fuel Temperature Sensor "A" Circuit High Input |
DESCRIPTION
The fuel temperature sensor monitors the fuel temperature. A thermistor built into the sensor changes the resistance value according to the fuel temperature. The lower the fuel temperature is, the greater the thermistor resistance becomes, and the higher the temperature is, the lower the resistance becomes (see figure 1).The fuel temperature sensor is connected to the ECM. The 5 V power source voltage in the ECM is applied to the fuel temperature sensor from terminal THF via resistor R. Resistor R and the fuel temperature sensor are connected in series. When the resistance value of the fuel temperature sensor changes in accordance with the fuel temperature, the voltage at terminal THF also changes. Based on this signal, the ECM corrects the pressure control compensation of the supply pump and errors.
- УКАЗАНИЕ:
- When the fuel temperature sensor output is outside the normal range, the ECM determines this as a malfunction.
| DTC No. | DTC Detection Condition | Trouble Area |
| P0182 P0183 | Open or short in fuel temperature sensor circuit for 2.0 seconds (The MIL is illuminated and a DTC is immediately set when a malfunction is detected) |
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- УКАЗАНИЕ:
- These DTCs are set when the engine idles for approximately 15 seconds.
WIRING DIAGRAM
INSPECTION PROCEDURE
- УКАЗАНИЕ:
- Read freeze frame data using an intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
| 1.INSPECT SUPPLY PUMP ASSEMBLY (FUEL TEMPERATURE SENSOR) |
Disconnect the fuel temperature sensor connector.
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Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection Condition Specified Condition B72-1 - B72-2 -20°C (-4°F) 13.92 to 17.01 kΩ B72-1 - B72-2 0°C (32°F) 5.31 to 6.49 kΩ B72-1 - B72-2 20°C (68°F) 2.25 to 2.75 kΩ B72-1 - B72-2 40°C (104°F) 1.06 to 1.29 kΩ B72-1 - B72-2 60°C (140°F) 0.54 to 0.66 kΩ B72-1 - B72-2 80°C (176°F) 0.29 to 0.36 kΩ B72-1 - B72-2 100°C (212°F) 0.17 to 0.20 kΩ
- OK:
- The fuel temperature sensor resistance is within the standard range.
Reconnect the fuel temperature sensor connector.
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| OK | |
| 2.CHECK HARNESS AND CONNECTOR (FUEL TEMPERATURE SENSOR - ECM) |
Disconnect the fuel temperature sensor connector.
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Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance (check for open):
Tester Connection Condition Specified Condition B72-1 - B77-39 (THF) Always Below 1 Ω B72-2 - B77-18 (ETHF) Always Below 1 Ω
- Standard resistance (check for short):
Tester Connection Condition Specified Condition B72-1 or B77-39 (THF) - Body ground Always 10 kΩ or higher B72-2 or B77-18 (ETHF) - Body ground Always 10 kΩ or higher
Reconnect the fuel temperature sensor connector.
Reconnect the ECM connector.
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| OK | ||
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