2002/02/04 Caterpillar

Asphalt Paver:

8-16B (S/N: BLK1-UP)

AP1055B (S/N: AGB1-UP)

BG-210B (S/N: 9XJ1-UP)

Cold Planer:

PM-465 (S/N: 5ZS1-UP)

Earthmoving Compactor:

826G (S/N: 7LN1-UP)

836G (S/N: 7MZ1-UP)

825G (S/N: 6RN1-UP)

Excavator:

5110B (S/N: AAA1-UP)

5130 (S/N: 5ZL1-UP)

5130B (S/N: 4CS1-UP)

5230 (S/N: 7LL1-UP)

5230B (S/N: 4HZ1-UP)

Integrated Toolcarrier:

IT62G (S/N: 6PS1-UP; AKP1-UP)

Motor Grader:

120H (S/N: 2AN104-UP; 4MK404-UP; 5FM800-UP; 6NM1-UP; 6TM366-UP; 6YN1-UP; 9FN471-UP; 9YR270-UP)

12H (S/N: 2GS360-UP; 2LR1-UP; 2WR642-UP; 4ER500-UP; 4XM1396-UP; 5ZM298-UP; 8MN460-UP)

135H (S/N: 3YK267-UP; 8WN290-UP; BDJ1-UP)

140H (S/N: 2ZK2392-UP; 3AS400-UP; 5HM1150-UP; 8JM280-UP; 8KM1-UP; 9TN300-UP; 9ZN205-UP)

143H (S/N: 1AL408-UP)

160H (S/N: 2FM400-UP; 2HS350-UP; 3GM80-UP; 6WM1-UP; 9EJ510-UP; 9JM350-UP)

163H (S/N: 5AK156-UP)

24H (S/N: 7KK1-UP)

Off-Highway Truck/Tractor:

769D (S/N: 5SS1-UP)

773D (S/N: 7CS1-UP)

777 (S/N: 84A1-UP)

777D (S/N: AGC1-UP; AGY1-UP)

784C (S/N: 2PZ1-UP)

785C (S/N: 1HW1-UP; 5AZ1-UP; APX1-UP)

789C (S/N: 2BW1-UP)

793C (S/N: 4GZ1-UP; ATY1-UP)

797 (S/N: 5YW1-UP)

771D (S/N: 6YS1-UP)

775D (S/N: 8AS1-UP)

Pipelayer:

572R (S/N: 2HZ1-UP; AAC1-UP)

Road Reclaimer/Soil Stabilizer:

RM350B (S/N: 7FS1-UP)

Track-Type Loader:

963C (S/N: 2DS1-UP)

973C (S/N: 3RZ1-UP)

Track-Type Tractor:

D10R (S/N: 3KR1-UP)

D11N (S/N: 4HK1-UP)

D11R (S/N: 7PZ1-UP; 8ZR1-UP; 9TR1-UP; 9XR1-UP; AAF1-UP)

D5M (S/N: 3CR1-UP; 5ES1-UP; 6AS1-UP; 6GN1-UP; 7LR1-UP)

D6M (S/N: 3WN1-UP; 4HS1-UP; 4JN1-UP; 5NR1-UP; 6LR1-UP)

D6R (S/N: 1RW1-UP; 2HM1-UP; 2YN1-UP; 3ZN1-UP; 4FM1-UP; 4HN1-UP; 4JR1-UP; 4MN1-UP; 4TR1-UP; 4WR1-UP; 5LN1-UP; 5PR1-UP; 5RR1-UP; 6FR1-UP; 6GR1-UP; 6HR1-UP; 6JN1-UP; 6MR1-UP; 7AR1-UP; 7DR1-UP; 7GR1-UP; 7KN1-UP; 8LN1-UP; 8TM1-UP; 8XN1-UP; 9BM1-UP; 9MN1-UP; 9PN1-UP; 9ZS1-UP; DMP1-UP)

D7R (S/N: 2EN1-UP; 2HR1-UP; 3DN1-UP; 3ZR1-UP; 4SR1-UP; 5KZ1-UP; 5MR1-UP; 6ER1-UP; 9HM1-UP; ABJ1-UP; ACS1-UP; ADW1-UP; AEC1-UP; AFG1-UP; AGN1-UP; CBZ1-UP)

D8R Series II (S/N: 6YZ1-UP; AKA1-UP)

Wheel Loader:

950G (S/N: 2JS1-UP; 3JW1-UP; 4BS1-UP; 5FW1-UP; 5MW1-UP; 6NS1-UP; 8JW1-UP)

962G (S/N: 3BS1-UP; 4PW1-UP; 5AS1-UP; 5RS1-UP; 6EW1-UP; 6HW1-UP; 7BW1-UP; BDP1-UP)

966G (S/N: 3PW1-UP; 3SW1-UP; 3ZS1-UP; 8XW1-UP; 9RS1-UP; AAH1-UP; HDH1-UP)

972G (S/N: 1EW1-UP; 4WW1-UP; 6AW1-UP; 7LS1-UP; 8TS1-UP; 9GW1-UP; AAW1-UP)

980G (S/N: 2KR1-UP; 2SR1-UP; 9CM1-UP)

988G (S/N: 2TW1-UP)

992G (S/N: 7HR1-UP; ADZ1-UP)

994 (S/N: 9YF1-UP)

994D (S/N: 3TZ1-UP)

Wheel Skidder:

525B (S/N: 3KZ1-UP)

535B (S/N: AAE1-UP)

545 (S/N: 2FZ1-UP)

Wheel Tractor:

824G (S/N: 4SN1-UP)

834G (S/N: 6GZ1-UP)

854G (S/N: 1JW1-UP)

Wheel Dozer:

854G (S/N: AMP1-UP)

Service Magazine SEPD0629, 05 May 2002, "Test Harness for Machine Electronic Control Modules (ECM)". The above-referenced article is incorrect. Refer to the article that follows.

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 J2

If ET will not communicate with the machine ECM, perform the following procedure.

1. Turn the key switch to the OFF position. Disconnect the machine harness from the machine ECM.

2. Connect the Test Harness's 40-pin connector (110-6848 Connector Plug ) to the ECM connector J1 (1) .

3. Connect the Test Harness's red wire to B+ (+24 DCV). Connect the Test Harness's black wire to B- (GND).

4. Connect a laptop computer to the 171-4400 Communication Adapter Gp .

5. Connect the Test Harness's 9-pin connector (8T-8736 Connector Receptacle ) to the 171-4400 Communication Adapter Gp .

6. Use WinFlash in order to detect the machine ECM. If ET communicates with the machine ECM (while the test harness is installed), the machine harness may be faulty.

7. If the machine ECM is not detected (while the test harness is installed), use the following procedure to check the test harness.

   1. Ensure that there is +24 DCV on the 40-pin connector's Pin 1. Ensure that Pin 2 on the 40-pin connector is connected to GND.

   2. Verify continuity between the 40-pin connector's Pin 9 and the 9-pin connector's Pin D.

   3. Verify continuity between the 40-pin connector's Pin 3 and the 9-pin connector's Pin E.

8. Ensure that the 171-4400 Communication Adapter Gp and the Communication Adapter Cable work properly.

9. If the test harness, communication adapter, and the communication adapter cable work properly and there is still no communication between ET and the machine ECM, the machine ECM may be faulty.