Measurement examples

Measurement examples

This TiePie automotive diagnostics section shows measurement examples from a number of sensors and actuators that are used in the automotive industry. The examples explain how the sensors and actuators work and how the lab scope needs to be setup in order to measure their signals and check for correct functioning.

For each sensor and actuator a diagram is included, showing the connections to the ECU, power supply and other components. Also the measuring positions are shown in the diagram. A picture shows how to connect the Automotive scope ATS5004D with a Measure lead TP-C1812B and Back Probe TP-BP85 to the sensor or actuator.

Common

In the articles below, extra functionality of the Multi Channel oscilloscope software for measuring on sensors and actuators is described.

Miscellaneous

Miscellaneous measurements with measured data.

  • Performing a power measurement
    Performing a power measurement

    Engine power measurement (kW and hp) with accelerometer and lab scope, performed while driving a vehicle, without dyno or other test facilities.

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  • Performing a relative compression test
    Performing a relative compression test

    The relative compression test in Multi Channel oscilloscope software is briefly explained, with instructions on how to perform a relative compression test with just a lab scope and current clamp.

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  • Diesel return flow measurement
    Diesel return flow measurement

    With a lab scope and an Diesel Return Flow Sensor RFS400 the return flow from common rail diesel injectors is measured. The signals from the Diesel Return Flow Sensor RFS400 are shown and can be downloaded. To help determining whether the injectors are functioning correctly, different deviations from the example signal are mentioned along with possible causes.

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  • Performing a smooth running test
    Performing a smooth running test

    A smooth engine running test is performed with a lab scope to check the condition of main input and output signal from an engine management system. The smooth engine running test is performed on engines that run troublesome, misfire or have erratic fault at higher RPM's. Example signals are shown and can be downloaded.

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Sensors

The list below contains measurements on common automotive sensors with measured data.

  • ABS sensor inductive
    ABS sensor inductive

    With a lab scope an inductive ABS sensor is measured on a wheel that is turned by hand. The signal from the sensor is shown and can be downloaded. To help determining whether an inductive ABS sensor is functioning correctly, different possible deviations from the example signal are mentioned along with possible causes.

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  • ABS sensor Hall
    ABS sensor Hall

    With a lab scope a 2 wire Hall effect ABS sensor signal voltage is measured with the wheel turned by hand. The signal from the sensor is shown and can be downloaded. To help determining whether the 2 wire Hall effect ABS sensor is functioning correctly, different deviations from the example signal are mentioned along with possible causes.

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  • Acceleration pedal sensor
    Acceleration pedal sensor

    With a lab scope an acceleration pedal position sensor is measured with the key turned on and no running engine. The signal from the sensor is shown and can be downloaded. To help determining whether an acceleration pedal position sensor is functioning correctly, different possible deviations from the example signal are mentioned along with probable causes.

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  • Mass Air Flow (MAF) vane sensor
    Mass Air Flow (MAF) vane sensor

    With a lab scope an air flow sensor is measured under the following conditions: key on, cranking, idle, 2000 RPM, 3000 RPM and back to idle with an engine at operating temperature. The signal from the sensor is shown and can be downloaded. To help determining whether an air flow sensor is functioning correctly, different deviations from the example signal are mentioned along with possible causes.

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  • Mass Air Flow (MAF) hot wire sensor
    Mass Air Flow (MAF) hot wire sensor

    With a lab scope a Mass Air Flow (MAF) sensor is measured under the following conditions: key on, cranking, idle, 2000 RPM, 3000 RPM and back to idle with an engine at operating temperature. The signal from the sensor is shown and can be downloaded. To help determining whether a MAF sensor is functioning correctly, different possible deviations from the example signal are mentioned along with probable causes.

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  • Mass Air Flow (MAF) hot wire sensor with frequency output
    Mass Air Flow (MAF) hot wire sensor with frequency output

    With a lab scope a hot wire mass air flow (MAF) sensor with frequency output is measured under the following conditions: key on, cranking, idle, 2000 RPM, 3000 RPM and back to idle with an engine at operating temperature. The signal from the sensor is shown and can be downloaded. To help determining whether the hot wire mass air flow (MAF) sensor with frequency output is functioning correctly, different deviations from the example signal are mentioned along with possible causes.

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  • Camshaft sensor Hall
    Camshaft sensor Hall

    With a lab scope a Hall effect camshaft sensor is measured during cranking of an engine. The signal from the sensor is shown and can be downloaded. To help determining whether a Hall effect camshaft sensor is functioning correctly, different possible deviations from the example signal are mentioned along with probable causes.

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  • Camshaft sensor inductive
    Camshaft sensor inductive

    With a lab scope an inductive camshaft sensor is measured during cranking of an engine, as well as during idling. The signal from the sensor is shown and can be downloaded. To help determining whether an inductive camshaft sensor is functioning correctly, different possible deviations from the example signal are mentioned along with probable causes.

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  • Crankshaft sensor Hall
    Crankshaft sensor Hall

    With a lab scope a Hall effect crankshaft sensor is measured during cranking of an engine. The signal from the sensor is shown and can be downloaded. To help determining whether a Hall effect crankshaft sensor is functioning correctly, different possible deviations from the example signal are mentioned along with probable causes.

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  • Crankshaft sensor inductive
    Crankshaft sensor inductive

    With a lab scope an inductive crankshaft sensor is measured during cranking of an engine, as well as during idling. The signal from the sensor is shown and can be downloaded. To help determining whether an inductive crankshaft sensor is functioning correctly, different possible deviations from the example signal are mentioned along with probable causes.

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  • Lambda sensor (zirconia)
    Lambda sensor (zirconia)

    With a lab scope a zirconia lambda sensor is measured on an idling engine at operating temperature. The signal from the sensor is shown and can be downloaded. To help determining whether a zirconia lambda sensor and its heating is functioning correctly, different possible deviations from the example signals are mentioned along with probable causes.

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  • Broadband lambda sensor
    Broadband lambda sensor

    With a lab scope a broadband oxygen sensor signal voltage is measured. The sensor signal is shown and can be downloaded. To help determining whether the broadband oxygen sensor is functioning correctly, different deviations from the example signal are mentioned along with possible causes.

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  • Manifold Absolute Pressure (MAP) sensor
    Manifold Absolute Pressure (MAP) sensor

    With a lab scope a Manifold Absolute Pressure (MAP) sensor is measured under the following conditions: key on, cranking, idle, 2000 RPM, 3000 RPM and back to idle with an engine at operating temperature. The signal from the sensor is shown and can be downloaded. To help determining whether a MAP sensor is functioning correctly, different possible deviations from the example signal are mentioned along with probable causes.

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  • Coolant temperature sensor
    Coolant temperature sensor

    With a lab scope a coolant temperature sensor is measured from an engine in a warming up stage. The signal from the sensor is shown and can be downloaded. To help determining whether a coolant temperature sensor is functioning correctly, different possible deviations from the example signal are mentioned along with probable causes.

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  • Throttle valve position sensor single
    Throttle valve position sensor single

    With a lab scope a throttle valve position sensor is measured with the key turned on and no running engine. The signal from the sensor is shown and can be downloaded. To help determining whether a throttle valve position sensor is functioning correctly, different possible deviations from the example signal are mentioned along with probable causes.

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  • Throttle valve position sensor dual
    Throttle valve position sensor dual

    With a lab scope a throttle valve position sensor is measured with the key turned on and engine off. The signal from the sensor is shown and can be downloaded. To help determining whether a throttle valve position sensor is functioning correctly, different possible deviations from the example signal are mentioned along with possible causes.

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Actuators

The list below contains measurements on common automotive actuators with measured data.

  • Direct injection servo hydraulic voltage and current
    Direct injection servo hydraulic voltage and current

    Lab scope measurement of servo hydraulic injector voltage and current on an idling engine at operating temperature. The measured voltage and current is shown and can be downloaded. To help determining whether the servo hydraulic injector is functioning correctly, different possible deviations from the example signal are mentioned along with possible causes.

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  • Direct petrol-injection voltage and current
    Direct petrol-injection voltage and current

    Lab scope measurement of direct petrol injector voltage and current on an idling engine at operating temperature. The signals from the direct petrol injector are shown and can be downloaded. To help determining whether the direct petrol injector is functioning correctly, different deviations from the example signal are mentioned along with possible causes.

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  • Indirect injection current
    Indirect injection current

    With a lab scope an injector current is measured on an idling engine at operating temperature. The measured current is shown and can be downloaded. To help determining whether the injector is functioning correctly, different possible deviations from the example signal are mentioned along with possible causes.

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  • Indirect injection voltage
    Indirect injection voltage

    A lab scope is used to measure an injector signal voltage on an idling engine at operating temperature. The signal from the sensor is shown and can be downloaded. To help determining whether the injector is functioning correctly, different possible deviations from the example signal are mentioned along with possible causes.

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  • COP ignition
    COP ignition

    With a lab scope a COP ignition is measured with a Coil-on-Plug probe TP-COP750. The signal from the COP ignition is shown and can be downloaded. To help determining whether the COP ignition is functioning correctly, different deviations from the example signal are mentioned along with possible causes.

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  • Canister purge valve
    Canister purge valve

    With a lab scope a canister purge valve signal voltage is measured on an idling engine at operating temperature. The signal from the sensor is shown and can be downloaded. To help determining whether the canister purge valve is functioning correctly, different possible deviations from the example signal are mentioned along with possible causes.

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  • Throttle valve control motor DC
    Throttle valve control motor DC

    With a lab scope a throttle valve control motor signal voltage is measured with the key on and engine off. The signal from the actuator is shown and can be downloaded. To help determining whether the throttle valve control motor is functioning correctly, different deviations from the example signal are mentioned along with possible causes.

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  • Throttle valve control stepper motor
    Throttle valve control stepper motor

    With a lab scope throttle valve position stepper motor control signals are measured with a revved engine at operating temperature. The signal from the actuator is shown and can be downloaded. To help determining whether the throttle valve position stepper motor is functioning correctly, different deviations from the example signal are mentioned along with possible problem causes.

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  • Idle air control valve
    Idle air control valve

    With a lab scope an idle air control valve signal voltage is measured under various conditions. The signal from the actuator is shown and can be downloaded. To help determining whether the idle air control valve is functioning correctly, different deviations from the example signal are mentioned along with possible causes.

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Combination measurements

The list below contains measurements on conbinations of common automotive actuators and sensors with measured data.

  • Turbo pressure regulation system
    Turbo pressure regulation system

    Lab scope measurement of a turbo charge pressure regulation system on a car during acceleration. The signals from the turbo charge pressure regulation system are shown and can be downloaded. To help determining whether the turbo charge pressure regulation system is functioning correctly, different deviations from the example signals are mentioned along with possible causes.

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  • EGR valve DC motor and position sensor
    EGR valve DC motor and position sensor

    Lab scope measurement of an EGR valve position DC motor and position sensor on an engine under various conditions. The signal from the DC motor and position sensor are shown and can be downloaded. To help determining whether the EGR valve is functioning correctly, different deviations from the example signal are mentioned along with possible causes.

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  • Fuel pressure sensor and fuel metering valve
    Fuel pressure sensor and fuel metering valve

    With a lab scope a fuel pressure sensor and fuel metering valve signal voltage are measured on an engine under various conditions. The signal from the fuel pressure sensor and metering valve are shown and can be downloaded. To help determining whether the fuel pressure sensor and metering valve are functioning correctly, different deviations from the example signal are mentioned along with possible causes.

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