Procedure to Reprogram the Machine ECM on Certain Compact Wheel Loaders {7490, 7600, 7610, 7620} Caterpillar

Compact Wheel Loader

906K (S/N: L661-UP)

906M (S/N: H661-UP; Z661-UP)

907K (S/N: L771-UP)

907M (S/N: H771-UP; Z771-UP)

908K (S/N: L881-UP)

908M (S/N: H881-UP; Z881-UP)

910K (S/N: AY41-UP)

914K (S/N: CD21-UP)

Introduction

New software is available for certain compact wheel models. The software requires that both primary and secondary processor software is updated.

The flashing of the secondary software is achieved via the installation of a jumper harness to allow the CAN BUS to be connected to the secondary processor via pins on ECM J1 plug.

The flashing of the primary software is achieved via the normal process.

New ECM's with part number 438-9506 are released with the latest secondary software installed.

Read the entire Special Instruction. Do not perform any procedures or order any parts until you have read the information and you understand the information contained in this publication.

Safety Section

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Do not operate or work on this machine unless you have read and understand the instructions and warnings in the Operation and Maintenance Manuals. Failure to follow the instructions or heed the warnings could result in injury or death. Contact your Cat dealer for replacement manuals. Proper care is your responsibility.

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Hot parts or hot components can cause burns or personal injury. Do not allow hot parts or components to contact your skin. Use protective clothing or protective equipment to protect your skin.

Required Parts

Illustration 1	g06096856
Harness Setup (1) Green and Yellow from Keypad Plug (2) 2x 115-8109 Splice (3) ECM Plug (for illustration only) (4) 2x 8T-8729 Pin-Connector (5) 2x 394-9569 Socket-Connector (6) (30.0 cm) 130-4673 Electrical Wire (Yellow) (7) (30.0 cm) 130-4676 Electrical Wire (Green)

Illustration 2	g06081069
ECM plug for reference only

Installation Procedure

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Illustration 3	g06028478
Right-Hand Side View of Cab Where the ET Connector and ECM are Located

1. Connect ET service tool and download PSR then remove ET service tool to allow access.

   Note: Use ET 2016A or later.

2. Turn off battery disconnect switch.

3. Remove plug from keypad (harness plug will be in the same location if key pad not installed).
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   Illustration 4	g06028488
   CAN High Yellow Pin 3 CAN Low Green Pin 6

4. Remove green and yellow CAN (hi/low) wire from the plug using tool 355-2848.
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   Illustration 5	g06028549
   (6) 115-8109 Wire Splice

5. Connect CAN high and low to wire splice (6).
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   Illustration 6	g06065543
   ECM Plug Location

6. Remove J1 plug from the ECM.
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   Illustration 7	g06028520
   (8) Wire (300 mm x 2, 0.75 mm gauge) (9) CAN high yellow pin 3 (10) CAN low green pin 4

7. Make up harness extension using required parts listed. Refer to Illustration 7.

   Note: Ensure that the wires are twisted as shown.

8. Remove blanks from pins J1-3 and J1-4.

9. Install jumper harness into J1-3 (CAN high yellow) and J1-4 (CAN low green). Ensure that the wires are twisted.

10. Install J1 plug on to the ECM.
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    Illustration 8	g06028549
    (6) 115-8109 Wire Splice

11. Connect CAN hi/low from keypad to CAN hi/low from the ECM using wire splice (6). Refer to Illustration 8.

12. Turn on battery disconnect switch.
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    Illustration 9	g06028558

13. Connect ET service tool and connect via WinFlash, you will now see both parts of the processor, connect to ECM machine control #2.
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    Illustration 10	g06028569

14. Select secondary software.
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    Illustration 11	g06028572

15. Once secondary processor has been successfully flashed, exit ET. Remove ET service tool.

16. Turn off batter disconnect switch, remove plug J1 from the ECM, and remove jumper harness.

17. Install CAN wires into correct locations in keypad plug.

    • CAN high yellow pin 3

    • CAN low green pin 6

18. Install blanks into J1-3 and J1-4.

19. Reinstall the J1 plugs into the ECM.

20. Turn on battery disconnect switch.

21. Connect ET service tool and flash the primary ECM processor as per normal process with new software using WinFlash.

22. If successful, cycle the key switch on and off.

23. Clear all logged fault and event codes from the ECM, and download PSR.

    Note: After installing both primary and secondary software, recalibrate the below functions for each service letter group:

    • Group 1: Drive motor solenoid, Pump signal solenoid, and Valve calibrations.

    • Group 2: Valve calibrations and Pump signal solenoid.

    • Group 3 and 4: Calibrations not necessary. Do not calibrate.

    Note: To calibrate the drive motors, the machine wheels must be off the ground.

24. Remove ET service tool from machine.

25. Test machine.

26. Submit before and after PSR's via DSN.

Note: The new software will make the machine more aggressive than before in certain applications. For machines fitted with the optional 8 button keypad the aggressiveness of the machine can be turned down by changing the modes listed below on the keypad to meet customer expectations. For machines not fitted with the 8 button keypad the below listed modes can be changed via ET to meet customer expectations: See OMM SEBU9222-05 for more information on the adjustable modes as per below

Optional Keypad (17)

Illustration 12	g03428877
(4) Implement Modulation (7) Reduced Rimpull Hystat (8) Hystat Aggressiveness Adjustment

References

Systems Operation, Troubleshooting, Testing and Adjusting, UENR4703, "910K and 914K Compact Wheel Loaders Electrohydraulic System"

Systems Operation, Troubleshooting, Testing and Adjusting, UENR5036, "906K, 906M, 907K, 907M, and 908M Compact Wheel Loaders Electrohydraulic System"

Operation and Maintenance Manual, SEBU9222, "906K, 906M, 907K, 907M, 908K, and 908M Compact Wheel Loaders"