TM 5-3805-290-23-1
TROUBLESHOOTING WITH A DIAGNOSTIC CODE - CONTINUED
0009 00
Table 2. Machine Control System - Continued.
(MID 081)
TEST OR INSPECTION
CORRECTIVE ACTION
CID FMI CODE
1251 00
427-B1879
1. If resistance is greater than 5,000
1. Check R-terminal circuit for a short to
Ohms, go to Test 2.
+battery.
2. If resistance is less than 5.0 Ohms,
(a) Turn engine start switch and battery
there is a short to +battery. Replace
disconnect switch to OFF position (TM
wire in circuit for R-terminal, or repair
circuit (WP 0079 00).
(b) Disconnect J1 and J2 harness
connectors from machine ECM (WP
0052 00).
(c) Measure resistance from alternator R-
terminal wire (403 GN 18) to all
contacts used in J1 and J2 harness
connectors.
1. If alternator R-terminal is an 11 to 32V
2. Check machine alternator.
square-wave from 0 to 2 KHz, go to
(a) Disconnect wire (403 GN 18) from
Test 3.
2. If alternator R-terminal is not an 11 to
(b) Start engine (TM 5-3805-290-10).
32V square-wave from 0 to 2 KHz,
(c) Measure alternator R-terminal to verify
replace alternator (WP 0047 00).
there is 11 to 32V square-wave from 0
to 2 KHz. There should not be a steady
dc voltage equivalent to battery
present.
