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Performing Equipotential Bonding Testing
Performing Equipotential Bonding
Testing
Equipotential bonding testing is performed in order to check for problems
with connections between components, for example between the vehicle
chassis and shielding. It is carried out when installing or replacing high-
voltage components. In performing such testing, you will measure the
resistance of the ground connections with the vehicle chassis and high-
voltage parts. If the resistance value is high or exhibits signicant variability,
there may be an issue with the high-voltage component’s connection or a
problem with the component itself. For more information about testing, refer
to vehicle manufacturer’s service manual.
For more information about how to use the RM3548, see the RM3548’s
Instruction Manual.
You will need: RM3548 Resistance Meter and 9465-11 Pin Type Lead
1
Following the instructions in “Preparing to Repair or Inspect
the Vehicle (Disconnecting the Vehicle’s High-voltage Bus)”
(p. 13).
2
Following the instructions in “Verifying That There Is No
Voltage” (p. 18).
3
Connect the test leads to the RM3548.
4
Verify that the tips of the test leads being used with the
RM3548 are free of dirt and wear.
Remove any dirt since it could aect measured values.
5
Turn on the RM3548’s OVC function.
6
Set the measurement range.
The measurement current varies with the vehicle manufacturer.
For more information, refer to the vehicle manufacturer’s service
manual.
(To measure a resistance of 0.1 Ω or less at a measurement
current of 200 mA or greater, set the RM3548’s measurement
range to 300 mA.)
7
Connect the test leads to each measurement location.
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