TM 10-3930-675-24-1
ECU-TO-ECU COMMUNICATIONS TROUBLESHOOTING - CONTINUED
0014 00
Table 1. Error Code 103 - ECU 790 Not Responding (RESET or USMC Only).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 103 - ECU (790) Not Responding 1. Check ECU (790) connector 1 a. Repair or replace damaged
(RESET or USMC Only).
for damage or proper
connector (WP 0113 00).
connection.
b. Reconnect
disconnected
connector.
2. Check for voltage. Disconnect a. If voltage (24V) is not found at
ECU (790) connector 1 and
any of the pins, use the wiring
check voltage (24V) at pins 1,
diagram to check each circuit
15, 7, and 8 with the ignition
(WP 0048 00-5).
ON (WP 0048 00-5).
b. If voltage (24V) is found on all
pins, replace ECU (790) (WP
0081 00).
c. Repair or replace damaged
wires or connectors (WP 0113
00).
Table 2. Error Code 105 - ECU (790) Not Responding Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 105 - ECU (790) Not Responding.
1. Check ECU (790) connector 1 a. Repair or replace damaged
damage or proper connection.
connector (WP 0113 00).
b. Reconnect
disconnected
connector.
2. Disconnect
ECU
(790) a. If voltage (24V) is not found at
connector 1 and check voltage
any of the pins, use the wiring
(24V) at pins 1, 15, 7, and 8
diagram to check each circuit
with the ignition ON (WP 0048
(WP 0048 00-5).
00-5).
b. If voltage (24V) is found on all
pins, replace ECU (790) (WP
0081 00).
c. Repair or replace damaged
wires or connectors (WP 0113
00).
0014 00-2
