17
TROUBLESHOOTING
Power and Ground Electrical Tests
Unexplained cold starts are the most serious issue because they
represent a lack of integrity in the constant power supply to the
device. Before any other issue can be resolved, it is important to
ensure that the V3R has reliable constant power. Simply following
this procedure may not be enough. However, if the equipment is
acting up only under certain conditions (i.e. hot day, rainy weather)
the test should be performed again (and again?) under these
conditions.
1. Engage the equipment master switch
2. Connect Zonar harness to V3R™ case
3. Prepare multi-meter to measure volts.
4. Connect the negative meter probe to Zonar GND wire.
5. Refer to Figure 1-16 and locate the V+ pin on the 35-pin
connector. Probe this pin with the positive meter probe.
6. To pass the inspection, the voltage must be at or near battery
voltage. If not, perform the
Power and Ground Wiring
Inspection
. Then repeat this test.
7. If the test passes, power cycle the V3R, and confirm that a Cold
Start event occurred on GTC. Otherwise, note the failure
condition, and contact Zonar Support.
Test Result
If the Electrical test passes, but the V3R continues to show
unexplained cold starts, note the conditions under which the cold
starts occur. Repeat the
Power and Ground Wiring Inspection
procedure
and
the above procedure under those conditions. If
possible, mount the meter in the operator’s cab and run the test
continuously for several hours.
