READ VALUE USING INTELLIGENT TESTER (INTAKE AIR TEMPERATURE)
READ VALUE USING INTELLIGENT TESTER (CHECK FOR OPEN IN WIRE HARNESS)
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)
READ VALUE USING INTELLIGENT TESTER (CHECK FOR SHORT IN WIRE HARNESS)
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)
DTC P0110 Intake Air Temperature Circuit Malfunction |
DESCRIPTION
- The intake air temperature sensor, mounted on the mass air flow meter, monitors the intake air temperature. The intake air temperature sensor has a built-in thermistor with a resistance that varies according to the temperature of the intake air. When the intake air temperature becomes low, the resistance of the thermistor increases. When the temperature becomes high, the resistance drops. These variations in resistance are transmitted to the ECM as voltage changes (see Fig. 1).
- The intake air temperature sensor is powered by a 5 V supply from the THA terminal of the ECM, via resistor R.
Resistor R and the intake air temperature sensor are connected in series. When the resistance value of the intake air temperature sensor changes, the voltage at terminal THA varies accordingly. Based on this signal, the ECM increases the fuel injection volume when the engine is cold to improve driveability.
- УКАЗАНИЕ:
- When the intake air temperature sensor output is outside the normal range, the ECM determines this as a malfunction.
| DTC No. | DTC Detection Condition | Trouble Area |
| P0110 | Condition (a) or (b) continues for 2.0 seconds or more: (a) Intake air temperature sensor output is less than -40°C (-40°F) (The MIL is illuminated and a DTC is set when the same malfunction is detected on 2 consecutive trips*) (b) Intake air temperature sensor output is more than 135°C (275°F) (The MIL is illuminated and a DTC is set when the same malfunction is detected on 2 consecutive trips*) *: One trip is counted when the ignition switch is turned from off to the ON position and back to off |
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- УКАЗАНИЕ:
- When DTC P0110 is set, check the intake air temperature by selecting the following menu items on an intelligent tester: Powertrain / Engine and ECT / Data List / Intake Air.
- DTC P0110 is set when the engine idles for approximately 15 seconds.
| Temperature Displayed | Malfunction |
| -40°C (-40°F) | Open circuit |
| 140°C (284°F) or higher | Short circuit |
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.READ VALUE USING INTELLIGENT TESTER (INTAKE AIR TEMPERATURE) |
Connect the intelligent tester to the DLC3.
Turn the ignition switch to the ON position.
Turn the tester on.
Enter the following menu items: Powertrain / Engine and ECT / Data List / Intake Air.
Read the value.
- OK:
- Same as actual Intake Air Temperature (IAT).
- Result:
Result Proceed to Temperature displayed -40°C (-40°F) A Temperature displayed 140°C (284°F) or higher B Temperature displayed same as actual intake air temperature C
- УКАЗАНИЕ:
- If there is an open circuit, the intelligent tester indicates -40°C (-40°F).
- If there is a short circuit, the intelligent tester indicates 140°C (284°F) or higher.
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| A | |
| 2.READ VALUE USING INTELLIGENT TESTER (CHECK FOR OPEN IN WIRE HARNESS) |
Disconnect the mass air flow meter connector.
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Connect terminals THA and E2 of the mass air flow meter wire harness side connector.
Connect the intelligent tester to the DLC3.
Turn the ignition switch to the ON position.
Turn the tester on.
Enter the following menu items: Powertrain / Engine and ECT / Data List / Intake Air.
Read the value.
- Standard:
- 140°C (284°F) or higher
Reconnect the mass air flow meter connector.
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| OK | ||
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| 3.CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) |
Disconnect the mass air flow meter connector.
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Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection Condition Specified Condition B57-4 (THA) - B77-7 (THA) Always Below 1 Ω B57-5 (E2) - B77-6 (ETHA) Always Below 1 Ω
Reconnect the mass air flow meter connector.
Reconnect the ECM connector.
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| OK | ||
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| 4.READ VALUE USING INTELLIGENT TESTER (CHECK FOR SHORT IN WIRE HARNESS) |
Disconnect the mass air flow meter connector.
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Connect the intelligent tester to the DLC3.
Turn the ignition switch to the ON position.
Turn the tester on.
Enter the following menu items: Powertrain / Engine and ECT / Data List / Intake Air.
Read the value.
- Standard:
- -40°C (-40°F)
Reconnect the mass air flow meter connector.
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| OK | ||
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| 5.CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) |
Disconnect the mass air flow meter connector.
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Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection Condition Specified Condition B57-4 (THA) or B77-7 (THA) - Body ground Always 10 kΩ or higher
Reconnect the mass air flow meter connector.
Reconnect the ECM connector.
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| OK | ||
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