Testing Procedures
Black Negative
Ground
1. Connect Sensor Lead with Main Cable and Timing Light. (See above pic)
2. Keep the vehicle engine off. Locate the #1 Injector fuel pipe. If the #1 Injector fuel pipe is not
accessible, its companion injector's fuel pipe can be used for testing.
3. Clamp the Piezo Clamp on a straight section of #1 Injector fuel pipe as close to the pump as
possible (there is less noise on the pump side to interference with the pulse), and away from
engine for not acquiring incorrect signal. Piezo Clamp and fuel pipe should be clean and dry.
Make sure the fuel pipe is straight and is in contact with the Piezo Clamp but do not overtighten.
Overtightening may cause damage on sensor element.
4. Connect Sensor Lead clips YELLOW to one Adjustable Nut and BLACK to #1 Injector fuel pipe.
Warning: Black Sensor clip DOES NOT touch Glow Plug Plate; it may cause circuit shorten, or even
worse to damage a complete circuit and disable engine operation and the connected timing tester.
5. Connect the Power Lead clips RED to positive and BLACK to negative of the vehicle battery.
6. Start the engine and warm up to operating temperature, then read the results from the timing light.
TIP: The best way to connect the clamp is to tighten the clamp wheel until the contact is made with
the injector pipe, then turn the wheel 1/4 of a revolution more. The injector pipe is used as a ground
connection for the PIEZO clamp. The injector pipe must be clean to insure a good electrical contact,
and if necessary can use an abrasive paper on the pipe. Make certain the clamp DOES NOT touch
any other part of the engine except the injector pipe. Otherwise, the sensing element may send false
signals due to the engine's vibration.
TIP: If the LED on the Diesel converter box is not flashing, check cable connections as well as the
clamp if it has a contact with the injector pipe. The timing light cannot be triggered while the LED on
the Diesel converter box is not flashing. Refer to the instructions of petrol engine timing light shown on
P2-P9 in this manual while operating a diesel engine timing light to take measurements and read the
values on display.
TIP: When the timing light captures a RPM readout, the timing light will emit a flash signal and display
RPM value on display. However, prior to do the test, the engine should be warmed up to an operating
temperature.
SW-Stahl und Werkzeugvertriebs GmbH
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Red Positive
Battery 12 / 24V
Tel. +49 (0) 2191 / 46438-0
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ax +49 (0) 2191 / 46438-40
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