SEAL-WIPER 4442613 - Caterpillar

Introduction
The Test Harness for Machine Electronic Control Modules (ECM) is used to communicate between the ECM and Electronic Technician (ET). This harness can be used to eliminate the machine harness as a cause of an ECM error. This harness can also be used to flash an ECM with the application software before the ECM is installed on the machine.
Table 1
Machine Electronic Control Modules    
Part Number     Description    
172-9387     Unprogrammed Electronic Control Module    
172-9389     Unprogrammed Electronic Control Module    
172-9391     Unprogrammed Electronic Control Module    Test Harness Construction
Illustration 1 g01065427
Table 2
Parts List    
Item     Qty     Part Number     Description    
1     1     8T-8736     Connector Receptacle (9 pin)    
2     1     110-6848     Connector Plug (40 pin)    
3     4     8T-8729     Connector Pin    
4     4     8T-8730     Connector Socket    
5     1     3K-8782     Fuse    
6     1     9G-2731     Fuse Holder As    
7     As needed     N/A     16 AWG Wire    Procedure to Check the Machine Harness
Table 3
Tools Needed    
Part Number     Description     Qty    
N/A     Laptop Computer (1)     1    
6V-7070     Digital Multimeter (or similar)     1    
171-4400     Communication Adapter Gp     1    
( 1 ) The recommended laptop computer configuration is as follows: IBM® compatible PC with Pentium III 450 MHz processor or greater, 128 MB of RAM, 1 GB of available hard disk drive, Microsoft® Windows NT 4.0 (Service Pack 4) or Windows 9x.
Illustration 2 g00279578
Machine Electronic Control Module (1) Connector J1 (2) Connector J2If ET will not communicate with