TTU-3640 (GS-364) - Off-Road ECM Devices

Verifying the Correct Harness

Ensure that you are using the correct cable harness based on the type of vehicle you're working with. Below is a list of the harnesses and their appropriate vehicles:

For Off-Road John Deere Equipment:

J1939 Type 2 (e.g.,Excavator, Loader, Etc.)
- Cable Part # GS364HYT-J1939T2

For : Off-Road CAT Equipment:

CAT 9 Pin (e.g.,Pavers, All CAT Equipment older than 2018)
- Cable Part # GS364HYT-CAT9

CAT 9 Pin(Nut) (Used for New Skid Steers and Some Newer Mini Ex)
- Cable Part # GS364HYT-CAT9 (Nut)

CAT 14 Pin (e.g., Equipment 2018 or Newer, Not Pavers or Skid Steers)
- Cable Part # GS364HYT-CAT14

For Off-Road Komatsu Equipment

Komatsu Harness (All Komatsu Equipment)
- Cable Part # GS364HYT-KOM

For Off-Road Mack or Volvo

For Off-Road Mack or Volvo
- OBDII Mack/Volvo
- Cable Part # GS364HYT-J1962VM

Make sure to check the vehicle’s specifications and match it with the correct cable to avoid connection issues.

Verifying the Unit Light Status

1. No Satellites (Green Light Flashing)

If the green GPS LED light is flashing, the device is actively searching for satellites but hasn't acquired a GPS lock.

a. Is the device under metal?

Problem: Metal objects can block satellite signals. (Devices can be covered by plastic/fiberglass/ect.)
Solution: Ensure the device is not under or surrounded by metal (e.g., metal roofs, metal enclosures, etc.). Move the device to an open area with a clear view of the sky.

b. Does the device have a clear view of the sky?

Problem: The device requires a clear, unobstructed line of sight to the sky to communicate with satellites.
Solution: Position the device in an open area, free from obstructions like tall buildings, trees, or other structures.

2. No Cellular Connection (Amber Light Flashing)

If the amber cellular LED is flashing, the device is attempting to connect to the cellular network but has not yet established a connection.

a. Is the SIM activated?

Problem: The SIM card may not be activated or correctly provisioned.
Solution: Check if the SIM card has been activated with the cellular provider. Contact the provider to verify activation if necessary.

b. Are you in an area with Cellular service (Verizon/AT&T)?

Problem: The device may be in an area without cellular service.
Solution: Ensure you're in an area with coverage for the supported networks (Verizon/AT&T). Try moving to a different location to improve signal reception