TM 10-3930-675-24-1
STEERING ECU (792), TRANSMISSION ECU (793), AND ENGINE ECU (794)
TROUBLESHOOTING - CONTINUED
0015 00
Table 6. Error Code 1343 - Engine ECU (794) Internal Communication Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 1343 - Engine ECU (794) Internal 1. Ensure ignition switch is in a. Tighten loose connections.
Communication Failure.
OFF position and check all b. Repair or replace damaged
engine and vehicle power and
connections (WP 0113 00).
ground
connections
for
corrosion and loose con-
nections.
2. With ignition switch in OFF
position, disconnect OEM
harness from engine ECU
(794). Disconnect positive (+)
and negative (-) battery cables
from battery.
3. Check engine ECU (794) Dry connectors as required.
connectors for moisture.
a. If resistance is not as specified,
a. Measure resistance from
repair
engine
harness
engine harness connector
connectors (WP 0113 00).
pin 7 to positive (+) battery b. Notify Sustainment Mainte-
terminal. Resistance should
nance to replace engine har-
be less than 10 Ohms.
ness.
engine harness connector
pin 8 to positive (+) battery
terminal. Resistance should
be less than 10 Ohms.
c. Measure resistance from
engine harness connector
pin 17 to positive (+) battery
terminal. Resistance should
be less than 10 Ohms.
engine harness connector
pin 18 to positive (+) battery
terminal. Resistance should
be less than 10 Ohms.
0015 00-7