TM 10-3930-675-20-1
0014 00-5
STEERING ECU (792), TRANSMISSION ECU (793), AND ENGINE ECU (794)
TROUBLESHOOTING - CONTINUED
0014 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
Communication Failure
1. Ensure that ignition switch is
in OFF position and check all
engine and vehicle power and
ground
connections
for
corrosion and loose con-
nections.
a. Tighten loose connections.
b. Repair or replace damaged
connections (WP 0111 00).
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)
connectors for moisture.
Dry connectors as required.
4. Check all power resistances:
a. If
resistance
is
not
as
specified,
repair
engine
harness connectors (WP 0111
00).
b. Notify SRA to replace engine
harness.
a. Measure resistance from
engine harness connector
pin 7 to positive (+) battery
terminal. Resistance should
be less than 10 ohms.
b. Measure resistance from
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. Resis-
tance should be less than 10
ohms.
d. Measure resistance from
engine harness connector
pin 18 to positive (+)
battery terminal. Resis-
tance should be less than 10
ohms.
