TM 5-3805-294-23-1
0124
Table 1. Engine Control Unit (ECU) Does Not Communicate With Service Advisor - Continued.
Test or Inspection
Corrective Action
Malfunction
Visually inspect ECU
1.
If damaged or has loose pins,
34.
ECU Connector J02
connector J02 for damage and
replace ECU. (Volume 4,
Has Damage or
loose pins. (Volume 5,
Loose Pins.
WP 0508) Restore machine to
WP 0800, Figure 146)
original condition.
2.
If not damaged and does not
have loose pins, proceed to
Malfunction 35.
1.
Turn key switch to ON position,
35.
Voltage Between
but DO NOT START ENGINE
Engine Interface
(TM 5-3805-294-10). (Volume
Wiring Harness
Connector J02
5, WP 0794)
Sockets B2 and L2
Not Within 1 Volt of
Battery Terminal
Voltage.
2.
Measure voltage (Volume 3,
WP 0369) between battery
negative and positive
terminals. (Volume 5,
WP 0800, Figure 5) Note
battery terminal voltage.
3.
Measure voltage (Volume 3,
WP 0369) between engine
interface wiring harness
connector J02 sockets B2 and
L2. (Volume 5, WP 0800,
Figure 47) Note reading.
4.
Turn key switch to OFF
1.
If within 1 volt of battery
position (TM 5-3805-294-10).
terminal voltage, proceed to
Malfunction 41.
(Volume 5, WP 0794)
If not within 1 volt of battery
2.
terminal voltage, Malfunction
36.
Measure resistance (Volume
1.
If continuity is present,
36.
Open Circuit
proceed to Malfunction 37.
Between Engine
3, WP 0369) between engine
Interface Wiring
interface wiring harness
2.
If continuity is not present,
Harness Connector
connector J02 socket L2
replace engine interface wiring
Socket L2 and
(Volume 5, WP 0800, Figure
harness. (Volume 4,
Ground.
47) and a known good ground.
WP 0509) Restore machine to
Note reading.
original condition.
1.
Remove engine compartment
37.
Connector H01 Has
lower access cover. (Volume
Damage or Loose
Sockets/Pins.
4, WP 0593)
0124-12