GS-364e (LMU-3640)- On Road ECM Device

1. 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 On-Road HD Trucks:

J1939 Type 1 or 2 (e.g., Peterbilt, Kenworth, etc. – NOT for MACK/VOLVO)
- Cable Part # 5C709M-2

For Light/Medium Pickup Trucks:

OBD II (e.g., Ford, Chevy, etc. – NOT for MACK/VOLVO)

Cable Part # 5C734M-2

For HD Trucks with OBDII:

OBD II (J1962) (Compatible with Mack, Volvo, and other HD trucks with OBDII)
- Cable Part # 5C990M-2

For Older HD Trucks (Typically 1995-2005):

J1708 (Older HD trucks)
- Cable Part # 5C970M-2

For Newer HD Trucks (Typically 2021/2022):

RP1226 (Note: Not all trucks come with this system, so it’s important to verify compatibility)
- Cable Part # GS364EHYN-RP1226BATT

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

2. 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

3. Troubleshooting Tips

Device Placement and Signal Quality:

The Device Shouldn't Be Hidden in a Metal Box: Metal enclosures can interfere with both cellular and satellite signals. Make sure the device is in an open space with a clear line of sight to both the sky (for GPS) and the nearest cell towers (for cellular connection).
Couple the Unit with the Correct Equipment on the FleetWatcher Website: Ensure that the device is properly configured with the correct vehicle type and system on the FleetWatcher website for accurate data collection and transmission.
If the Equipment is in the Shop: For better cellular and satellite reception, move the device to a location such as the yard where signals are typically stronger, if possible. Avoid locations with limited signal coverage (such as inside a building or underground).

General Troubleshooting Checklist:

Verify Cable Compatibility: Ensure the correct harness is being used for your vehicle type. Double-check the cable part numbers listed above to avoid mismatches.
Check LED Lights: Monitor the LED lights to understand the current status of GPS, vehicle connection, and cellular subsystem. Refer to the light status section for specific indications.
Proper Placement: Confirm that the device is not obstructed by metal or other interference that could block GPS and cellular signals.

Network Coverage: Ensure the device is within the coverage area for cellular (Verizon/AT&T) and has a clear view of the sky for GPS signal.