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honda crv 2011 + gauges circuit diagram - gauge control module: tach + fuel level sensor
1. Throttle position sensor
Function: The throttle position sensor is used to monitor the opening angle of the throttle, determine the idle speed, full load and acceleration/deceleration conditions, and implement the throttle opening status. Corresponding control of various fuel injection quantities. Failure effect: the idle speed varies from high to low, or it may cause runaway.
2. Inlet valve pressure sensor
Function: air inlet pressure sensor provides engine load information, i.e. In case of the pressure measurement of the intake pipe, indirectly measure the intake air volume entering the engine, and then convert the intake air volume into an electrical signal through the internal circuit to provide it to the computer. Failure effect: the engine is not easy to start, or the idle speed is unstable.
3. Intake air temperature sensor
Function: provide air temperature information for correcting fuel injection quantity and ignition timing. Failure effect: low idle speed, easy to shut down.
4. Crankshaft angle sensor
Function: It is used to provide speed and crankshaft phase information and provide reference points for fuel injection timing and ignition timing. Failure effect: the engine cannot be started or the engine suddenly stops after starting.
5. Coolant temperature sensor
Function: to monitor the engine coolant temperature, convert it into a voltage signal and send it to the computer. The ECU controls the fuel injection quantity, ignition timing and idle speed according to this signal. Failure effect: low idle speed.
6. Oxygen sensor
Function: It is the main element that provides mixer concentration information, is used to correct fuel injection quantity, realizes closed-loop control of air fuel ratio, and ensures that the actual air fuel ratio of the engine is close to the theoretical air fuel ratio. Failure effect: unstable idle speed and excessive consumption.
7. Knock sensor
Function: It is used to provide knock information, correct ignition timing, and realize knock closed-loop control. Failure effect: when the knock signal point cannot be provided before the knock is about to occur, the computer cannot receive the signal "peak value", and the ignition advance angle cannot be reduced, resulting in knock.
8. Three way catalyst
Function: the three-way catalyst is installed in front of the muffler in the exhaust pipe, It can simultaneously reduce three pollutants in the tail gas (For the content of carbon monoxide CO, unburned carbon oxide HC and oxide Nox, when the air-fuel ratio of the engine is close to the theoretical air-fuel ratio, the three-way catalytic converter has the highest conversion efficiency. When the high temperature of 300 ℃~800 ℃ of harmful gas is oxidized and reduced through the three-way catalytic converter center via the noble catalyst attached to the ceramic monomer, it is converted into harmless gas. Failure effect: the exhaust gas cannot meet the standard.
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