TM 10-3930-675-24-1
ECU-TO-ECU COMMUNICATIONS TROUBLESHOOTING - CONTINUED
0014 00
Table 9. Error Code 112 - Communication Failure Between Display ECU (795) and Engine ECU (794)
Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 112 - Communication Failure 1. Check circuit breaker F13 for a. Reset F13 circuit breaker.
Between Display ECU (795) and Engine ECU
trip.
Engine will not start if F13 is
(794).
off.
b. If engine will not start, check
voltage at F13, X16 pin 9 and
ECU (794) OEM connector
pin 38 with the ignition switch
ON.
c. If no voltage present, check
continuity of wires A169 and
169 (WP 0048 00-10).
d. Replace damaged or faulty
circuit breaker (WP 0074 00).
2. Enter "EXTRA FUNC" 9(13) Should have a "1" next to "RX
in the diagnostic menu.
794 ENGINE".
If there is a "0", continue with
step 3.
3. Check engine ECU (794) for Replace damaged connector or
loose or damaged connectors ECU (794) (WP 0080 00).
(WP 0048 00-10).
4. Check ECU (794) OEM Clean and repair connector as
connector pins 37, 38, and 46 required (WP 0113 00).
for dirty, corroded, bent,
broken, pushed back, or
extended pins (WP 0048 00-
10).
5. Locate X202 attached the a. Check X202 plug connector
harness just below the ECU
for
damage
or
loose
(794) OEM connector (WP
connection.
0048 00-3).
b. Unplug X202 and check
resistance on the plugged part
of the connector between pin 1
and 4. Resistance should be
122 Ohms.
c. Clean and repair connector as
required (WP 0113 00).
Replace if damaged.
0014 00-10
