6
TM 5-3805-291-23-2
MESSENGER ECM REPLACEMENT
THIS WORK PACKAGE COVERS
System Configuration Parameters, Copy Configuration from ECM, Remove Messenger, Install Messenger, Flash
Programming, Copy Configuration (Program ECM)
INITIAL SETUP
Maintenance Level
References
WP 0005 00
Unit
WP 0006 00
Tools and Special Tools
Equipment Conditions
Tool kit, general mechanic's, automotive (Item 90,
Machine parked on level ground (TM 5-3805-291-
10)
Adapter, test (Item 3, WP 0232 00)
Work tool lowered to ground (TM 5-3805-291-10)
Parking brake engaged (TM 5-3805-291-10)
Software kit (Item 75, WP 0232 00)
Wheels chocked
Test set, electronic systems (MSD) (Item 86, WP
Battery disconnect switch in OFF position (TM 5-
3805-291-10)
Materials/Parts
Drawings Required
Rag, wiping (Item 35, WP 0233 00)
TM 5-3805-291-23P, Figure 49
Personnel Required
Estimated Time to Complete Task
2.0 hr
MOS 62B, Construction Equipment Repairer
CAU T I ON
Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened compo-
nent life.
The replacement ECM must have the same serial number suffix or damage to the engine may result.
N OT E
If mission dictates, you may need to remove an ECM from a machine not in service. Refer to the following
steps to ensure that the configuration parameters match those in the faulty ECM. Be sure to clear any
logged codes if you use a substitute ECM.