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KAL 3840
Automotive Scope / GMM
User’s Manual
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Menu Overview MENU ( ) COMPONENT TESTS MENU SENSOR TESTS MENU SENSORS ABS Sensor (Mag) ACTUATORS O2S Sensor (Zirc) ELECTRICAL Dual O2 Sensor MAIN MENU IGNITION ECT Sensor CHANGE VEHICLE (or DIESEL) Fuel Temp Sensor COMPONENT TESTS IAT Sensor SCOPE Knock Sensor GRAPHING MULTIMETER TPS Sensor VEHICLE DATA CKP Magnetic INSTRUMENT SETUP CKP Hall CKP Optical GRAPHING MULTIMETER MENU VEHICLE DATA MENU CMP Magnetic VOLT DC, AC CYLINDERS :
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Contents 1. INTRODUCTION Menu Overview Vehicle manufacturers have helped you locate a driveability problem by designing Electronic Control Units with 1. Introduction trouble-code generating capabilities. But, the ECUs aren’t perfect because they don’t cover everything (most glitches 1.1 Comparing Scan Tools, DSOs and DMMs 1- 1 and intermittents). On-board diagnostic systems are engineered with fairly wide set limits for sensors, actuators, 1.2 Vehicle Service Manuals 1- 2 connectors and termin
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If you had a DSO, you could look at the output signal from each of the wheel speed sensors. From this you would 2. SAFETY INFORMATION have discovered that the left rear wheel speed sensor had some very fast aberrations that caused the ABS computer to act strange. You replace the left rear wheel speed sensor to cure the problem. The scan tools missed this problem because no trouble codes were set and the computer communication bus was too slow to pick up the spikes. The DMMs missed this problem b
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Avoid Fires: • Disconnect the live test lead before disconnecting the common test lead. • Do not perform internal service or adjustment of this instrument unless you are qualified to do so. • Do not position head directly over carburetor or throttle body. Do not pour gasoline down carburetor or throttle body when cranking or running engine. Engine backfire can occur when air cleaner is out of normal position. Avoid Burns: • Do not use fuel injector cleaning solvents or carburetor sprays when per
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3. AUTOMOTIVE ELECTRONIC SIGNALS 3.1 PRIMARY SIGNAL TYPES FOUND IN MODERN VEHICLES Once you become familiar with basic vehicle waveforms it will not matter how new or old the vehicle is, or even who manufactured the vehicle. You will be able to recognize signals that do not look right. Direct Current (DC) Signals The types of sensors or devices in a vehicle that produce DC signals are: • Power Supplies - Battery voltage or sensor reference voltages created by the PCM. • Analog sensor signals - e
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To minimize this possible interference with the oscilloscope, keep these tips and suggestions in mind: 3.2 CRITICAL CHARACTERISTICS OF AUTOMOTIVE ELECTRONIC SIGNALS Most interference will be picked up by the oscilloscope test leads. Only 5 critical characteristics (or information types) given from the Automotive electronic signals are important • Route the test leads away from all ignition wires and components whenever possible. because the vehicle’s PCM considers them important. • Use the short
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4. GETTING STARTED 4.1 PRODUCT DESCRIPTION This instrument is a battery-operated 2-channel lab scope, advanced true rms graphing multimeter (GMM) designed expressly for use in the automotive service market. The main purpose of this instrument is to provide advanced troubleshooting capabilities for automotive service technicians in an easy-to-operate format. This instrument offers the following features: • A 25 Mega-sample/Second (one channel minimum) sample rate for rapid data updates. • Lab sco
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• GRAPHING MULTIMETER 4.2 QUICK TOUR • VEHICLE DATA • INSTRUMENT SETUP Powering the Instrument The fastest way to set up the instrument to test most automotive devices(sensors, actuators...) and circuits is Press the POWER key to turn the instrument on. The instrument beeps once and turns on. to choose from one of the built in COMPONENT TESTS. Each test places the instrument in a configuration best At power on, the instrument displays the VEHICLE DATA menu as shown in Figure 1. suited to displa
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Next, press the Four Way arrow keys to highlight PIP/SPOUT. Press to select. Now, the instrument is ready to • Press the SAVE key to save the present screen in the next memory location. test the input signal(s). • Press the RECALL key to recall the screen last saved in memory. • Press the CLEAR key to clear all the memory locations. • Press the BACK key to resume measuring or to return to the previous display. Power Sources and Charging the Battery The instrument can be powered from any
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ITEM KEYS DESCRIPTION 4.3 FRONT PANEL CONTROLS HOLD Freezes the display (HOLD is displayed at the top right). Also displays a menu to Key Control Overview save or recall screens or to clear the memory. to These are the Function keys. The function assigned to eac h key is indicated by the Function Key Label displayed above the key on the bottom display. Cursor (Short) key allows you to use cursors for measurements on waveforms. A cursor is a vertical or a ho
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COM, TRIGGER 3. Measurement faults or short circuit with the DUAL INPUT SCOPE mode. This occurs when you perform floating measurements with grounding at different points. Used as external trigger for probes with dual banana plugs, such as the RPM Inductive Pickup. INPUT A INPUT A TRIGGER (as single input) Used in SCOPE mode to trigger (or start) acquisitions from an external source. INPUT B INPUT B COM (as single input) Used for safety grounding when the Capacitive Secondary Pickup is connected
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CHANGE VEHICLE MENU ( ) COMPONENT TESTS MENU SENSOR TESTS MENU Makes you be able to obtain the pin numbers and wire colors for both PCM and the other component connector from SENSORS ABS Sensor (Mag) HELP ( ) on the selected vehicle you want to test. ACTUATORS O2S Sensor (Zirc) ELECTRICAL Dual O2 Sensor MAIN MENU IGNITION ECT Sensor COMPONENT TESTS CHANGE VEHICLE (or DIESEL) Fuel Temp Sensor COMPONENT TESTS IAT Sensor Leads to a
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Getting Reference Information for the Selected Test Screen Displays Reference information is available at any time by pressing the HELP key. Press when finished viewing each area under the HELP menu. HELP ( ) HELP MENU PIN # / WIRE COLOR TEST PROCEDURE REFERENCE WAVEFORM THEORY OF OPERATION Figure 8. Single and Dual Input scope in COMPONENT TESTS TROUBLESHOOTING TIPS FUNCTION INFORMATION Use Dual Input Scope mode if you want to simultaneously meas
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KEYS The KEYS icon indicates that you can use the Four Way arrow keys to change Volt & Time 4.7 SCOPE MODE RANGE A ranges, to move the waveform position, and to adjust the trigger level for either INPUT A or INPUT B. MOVE A And also you can use the Four Way arrow keys to adjust the sensitivity level in the COMPONENT TRIG LVL TEST (IGNITION mode). SENS LVL SCOPE mode provides a display of signal patterns from Press to toggle among RANGE A , MOVE A , TRIG LVL , and SENS LVL for
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5. INSTRUMENT OPERATION 4.8 GMM (GRAPHING MULTIMETER) MODE GMM mode plots the results of signal measurements such 5.1 INSTRUMENT TEST MODES as frequency as the values change with time. The time range in GMM mode may be set manually from 5 seconds From the MAIN MENU, you can choose 3 independent instrument test modes: to 24 hours per display. • COMPONENT TESTS Ranges for the vertical scale may also be set manually, • SCOPE and the available range depends upon the measurement • GRAPHING MULTIMETER
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Function keys and Result Screen SCOPE displays are defaulted in “Glitch Detection” mode. This means that all signals are sampled at the full sample rate of the instrument and the minimum and maximum excursions are always shown on the display, even if the horizontal time setting is too slow to show each individual sample interval. In this mode, every noise spike of 40 ns and wider will be displayed. INPUT A Control Functions When you are in SCOPE, you can control the INPUT A functions as follows:
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Single-Shot Function AUTO versus NORMAL acquisitions Normally the scope mode automatically repeats the measurements to acquire waveforms by the recurrent If you select AUTO, the instrument always performs acquisitions, i.e., it always displays the signals on the input. If acquisition mode. NORMAL is selected, a trigger is always needed to start an acquisition. SINGLE-SHOT allows you to perform single acquisition to snap events that occur only once. REPEAT TEST ( ) is used to start a next s
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Cursor Key Function For VOLTS CURSORS, Volts dif feren ce b etw een C URSOR 1 a nd A cursor is a vertical line or a horizontal line placed over the displayed waveform to measure values at certain points. Samp le va lue at CURSOR 2 positions on the INPUT A waveform. The instrument can measure signal details by using Cursors. This function is not possible for all tests. CURSOR 2 position on th e I NPUT A Press CURSOR ( ) to display the Function key Menu for cursor operation. Samp le
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Using Graphing Multimeter (GMM) Code Measurement Graphing Type MAIN MENU GRAPHING MULTIMETER MENU DC VOLT DC Average Continuous MENU ( ) VOLT DC, AC SELECTED VEHICLE AC VOLT AC Average Continuous OHM / DIODE / CONTINUITY CHANGE VEHICLE AC+DC VOLT AC+DC Average Continuous RPM COMPONENT TESTS OHM Ohms Continuous FREQUENCY SCOPE DIODE Diode drop Continuous DUTY CYCLE GRAPHING MULTIMETER PULSE WIDTH CONTINUITY Continuity Continuous VEHICLE DATA DWELL RPM RP
