1 2-45. DCA TROUBLESHOOTING
These diagnostic connector assembly tests can be run any time you think there is a problem
with the vehicles DCA or its on-board transducers.
Do not use this paragraph to test the
and its cables and transducers.
Refer to TM 9-4910-571-12&P
to test the
STWICE-Ft. This paragraph will also supply instructions
on how to use the STUICE-R in the
TK mode to substitute for tests run through the DCA.
The HMMWV is equipped with three transducers
- the pulse tachometer,
the fuel pressure
and the current shunt. A power test (12, 13) or rpm test (10) use the pulse
tachometer. The fuel pressure test (24) uses the pressure transducer. All of the starting circuit
tests and battery tests done through the DCA use the shunt. Check to see that the wires are
connected to the transducer for the test youre trying to run. There is a four-wire connector for
the fuel pressure transducer, a two-wire connector for the pulse tachometer, and there are four
wires connected to the shunt in addition to the battery cables.
The fold-out page FP-29 gives a cross reference between DCA tests and Transducer Kit tests.
Use this cross reference to find out how to substitute TK tests for DCA tests if you have a bad
DCA. The Location of Parts page has a schematic of the HMMWV DCA.