TM 10-3930-675-24-1
ENGINE BATTERY VOLTAGE CIRCUITS TROUBLESHOOTING - CONTINUED
0025 00
Table 2. Error Code 1441 - Unswitched Battery
Supply Circuit Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 1441 - Unswitched Battery Supply Perform the troubleshooting
Circuit Failure.
procedures for error code 1434.
Table 3. Error Code 1442 - Unswitched Battery
Supply Circuit Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
Error Code 1442 - Unswitched Battery Supply
Circuit Failure.
Use test lead, male - part number 3822758 (Item 122,
3822917 (Item 124, WP 0289 00-14) to test the OEM
harness connector.
1. Check condition and charge of a. If the battery voltage of any
one battery drops below 6V
batteries. Check the voltage of
when cranking, service,
each battery while cranking the
charge, or replace battery.
engine.
b. Clean battery connections.
2. Check output voltage from If output voltage is higher then
26V, replace alternator (WP 0070
00).
3. Inspect the OEM harness a. Clean and repair connector as
required (WP 0113 00 00).
connector and ECU pins for
damage, dirt, or corrosion. b. Replace damaged ECU (794)
Remove the engine cover (WP
(WP 0079 00).
0148 00). Disconnect the OEM
harness connector from ECU
(794) (WP 0079 00).
4. Check
for
continuity. a. If continuity to ground is not
found at any one pin, check
Disconnect the OEM harness
wire W19 for proper
connector from ECU (794).
connection on the main
Check continuity to ground at
grounding stud on the end of
pins 29, 30, 39, 40, and 50 (WP
the starter.
0048 00-10).
b. Notify Sustainment
Maintenance to replace engine
and transmission wiring
harness.
0025 00-4
