TM 10-3930-675-24-1
STEERING ECU (792), TRANSMISSION ECU (793), AND ENGINE ECU (794) TROUBLESHOOTING
0015 00
THIS WORK PACKAGE COVERS
Error Code 1341 - Engine ECU (794) Loss of Data Fail-
Error Code 300 - Steering ECU (792) Hardware Failure
ure
Error Code 841 - Transmission ECU (793) Memory
Failure
Error Code 1343 - Engine ECU (794) Internal Commu-
nication Failure
Error Code 843 - Application Error Failure
Error Code 1111 - Engine ECU (794) Memory Failure
Error Code 1346 - Engine ECU (794) Software Failure
INITIAL SETUP
Tools and Special Tools
References
Test Lead, Male (Item 124, WP 0289 00)
TM 10-3930-675-10
NOTE
Refer to WP 0004 00 for additional troubleshooting guidance, information, and illustrations that
locate critical components.
Refer also to illustration at end of work package for component location.
Table 1. Error Code 300 - Steering ECU (792) Hardware Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
Error Code 300 - Steering ECU (792) Hardware
Failure.
If the engine is cranked and not started, then re-
cranked without turning the ignition OFF, ERROR
CODE 300 may be displayed. Turn off ignition for 30
seconds and restart.
1. Check circuit breakers F26 and Reset circuit breakers as required
F29 for trip.
(WP 0074 00).
2. Check voltage (24V) at X174 a. If no voltage (24V) is found,
pin 3 (WP 0048 00-16) with
check circuit breaker F29 and
the ignition ON.
continuity of wires A473 (WP
0048 00-16).
b. Replace damaged or faulty
circuit breaker (WP 0074 00).
c. Repair or replace damaged
wires or connectors (WP 0113
00).
