Kimball 22-832, User Manual

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Continuity can also be tested by powering up the connection
using the power switch. If the circuit breaker trips you know that
you have a good low resistance connection.
NOTE: You can use the probe tip to pierce the insulation on a
wire. This means that you can test the circuit without disconnecting
anything.
4 .3 Signal Circuit Testing
Once a DTC (diagnostic trouble code) is extracted from the
vehicles computer, there is a quick test you can perform to
verify the code.
For example, If you suspect there is a problem with the MAP
sensor circuit, follow the procedure to test the sensor:
• Set the tool in AC Voltage mode, using the probe tip with a
chassis ground or the auxiliary ground lead.
• Connect a vacuum pump to the MAP sensor.
•
Contact the probe tip to the MAP sensor pos1t1ve terminal and
observe the LCD readings which should be a sine wave in normal
condition.
• Apply vacuum.
•
Release vacuum and LCD readings. (Figure 11)
Figure 11
If the LCD readings are abnormal, there likely is a problem
with the sensor.
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