M2/M3 BFV: FIRE SUPPRESSION SYST - OD1607 - LESSON 2/TASK 2
3 When the replacement is complete, verify that the
problem has been solved by following the pathway one test procedure
described in paragraph 2c below.
(4) Determining the Troubleshooting Pathway. If the problem is
not being caused by low pressure in the fire bottle(s), the
troubleshooting procedure must continue. Perform the following steps
to determine which troubleshooting pathway to take:
(a) Remove the STE-M1/FVS (VTM only) from jack 1A1J14 (DCA
procedures described in lesson 1, task 2, beginning on page 10 of
this subcourse (TM 9-2350-252-20-1-2, pp. 4-7).
(c) Install the vehicle ground cable which was removed during
(d) Check the MANUAL light on the FIRE SUPPRESSION section of
the driver's instrument panel.
(e) If the MANUAL light is NOT ON, follow troubleshooting
pathway two, described in paragraph 2d on page 45 below.
(f) If the MANUAL light is ON, pathway three, described in
paragraph 2e on page 48 below, must be pursued.
(g) Whenever a troubleshooting pathway leads to a replacement
or repair to solve the problem, after making the repairs, repeat the
If the voltage reading is 20 volts or less,
follow pathway one to verify that the trouble has been corrected.
c. Pathway One.
Pathway one develops when the STE-M1/FVS test
number 67 results in a reading of less than 20 volts. Remember that
this is the pathway that will be followed when the fire suppression
system is being tested and no problems are turning up.
It is also
used to verify that all problems have been corrected after
troubleshooting procedures have been performed. To avoid confusion,
let's imagine that we're watching a mechanic perform the test.
Elrond has just received a voltage reading of 18 volts while running
test 67. He