5.2.
continuity testing
5.2.1.
While the probe is in resistance mode, continuity can be tested on wires and components attached to or disconnected from the
vehicle’s electrical system by utilizing the probe tip when connected with a chassis earth or the auxiliary earth lead (fig.9).
5.2.2.
Where continuity is present the LCD screen will display ‘0.0Ω’ and the green LED will illuminate. If the audible indicator is turned on a
low pitched tone will emit.
5.2.3.
In any other instance the LCD screen will display the resistance value (fig.10). For any resistance value greater than 199kΩ the LCD
screen will display ‘ol’.
5.2.4.
Another method to check for continuity of connections to earth or the battery is to use the power switch. if the circuit breaker trips,
there is a good, low-resistance connection.
5.3.
signal circuit testing
5.3.1.
The tool can be used as a trouble shooting aid to test sensors/components in a circuit where a DTC (Diagnostic Trouble Code) has
been detected during an on-board diagnostic scan.
5.3.2.
Always refer to the vehicle manufacturer’s service instructions, or a proprietary manual to establish the current procedure and data for
testing and location of the sensor/component to be tested.
5.3.3.
set the tool to scope mode and attach the auxiliary ground lead to earth.
Use the probe tip on the terminals of the sensor/component
as described in the manufacturer’s test procedures and observe the signal and readings on the LCD display screen (fig.11).
5.3.4.
Any abnormal signals or readings may indicate a fault with the sensor/component.
5.4.
activating components removed From vehicle electrical system (such as fuel pumps, starter solenoids, magnetic clutches,
blower motors, cooling fans, lights etc.)
5.4.1.
By using the probe tip together with the auxiliary earth lead, components can be activated, thereby testing their function.
5.4.2.
set the tool to the voltage mode.
5.4.3.
connect the auxiliary earth lead clip to the negative terminal of the component to be tested. contact the probe to the positive terminal
of the component. The test indicator should illuminate green, indicating continuity through the component (fig.12).
5.4.4.
Quickly press the power switch forward to the positive position and release. if the test indicator changes from green to red, you may
proceed with further activation. Press and hold the power switch forward to energise the component being tested.
5.4.5.
if circuit breaker activates, the unit has been overloaded.
the maximum current rating is 8amps.
this could happen for the following
reasons:
a) Where the tip of the tester has made contact is a direct earth or a negative voltage.
b) the component has a short circuit.
c) the component requires a high current (e.g. a starter motor).
note:
the tool is equipped with a built in circuit breaker for overload protection. should the circuit breaker be activated, reset using the
circuit breaker reset (fig.1 item 5).
5.5.
testing trailer Lights and connections
5.5.1.
set the tool to the voltage mode.
5.5.2.
connect to a battery of the correct voltage for the trailer electrical
system (fig.13).
5.5.3.
clip the auxiliary earth lead to an earth on the trailer chassis.
5.5.4.
Probe the contacts of the trailer’s electrical connection socket
whilst pressing the power switch forward to the positive position.
5.5.5.
this will allow you to check the function and orientation of the
trailer lighting system.
fig.9
fig.10
fig.11
fig.12
fig.13
P
P100.V2| Issue 1 13/06/17
Original Language Version
© Jack sealey limited
