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Align Bus Under Vehicle Detector.

Parking a bus so the vehicle detector gets a clean view of the flat part of the roof.

Fleetwatch FMS · Fuel Lane Operation
Vehicle Detector Resets While Fueling
If the transaction resets while fuel lane personnel are trying to fuel a bus, the bus is most likely not parked under the SRF55 vehicle detector. Realign the bus under the sensor and try again.
Fleetwatch parking diagram: park the vehicle under the Fleetwatch SRF55 vehicle detector during servicing to avoid an unintentional reset. Plan view shows the SRF55 centered over the vehicle's centerline, with the RIH unit beside the service position.
The plan view (top right) shows the correct service position: the SRF55 sits over the vehicle’s centerline, beside the RIH unit.

Why It Happens

The SRF55 is an overhead sensor that watches for a vehicle in the service position. As long as it sees the vehicle, the transaction stays open. When it stops seeing the vehicle, the system assumes the vehicle has left. It then resets the transaction, and the RIH goes back to the Employee prompt.

So if a bus is parked too far forward, too far back, or off to one side, the sensor may not see it, and the transaction can reset mid-fueling.

Common signs:
• The RIH returns to the Employee prompt before fueling is finished
• Fuel or fluid flow stops unexpectedly
• The same bus resets again on the next attempt without being moved

How to Fix It

1 Realign the bus. Pull the bus into the service position so it’s directly under the SRF55 sensor, centered in the lane as shown in the plan view.
2 Start the transaction again at the RIH and continue fueling.
3 Keep the bus still until servicing is complete. Moving it during fueling can take it out of the sensor’s view and reset the transaction again.
Quick check: the green LED
The vehicle detector’s control module (the “black box” in the JB20) has a green LED that turns on steady when a vehicle is detected under the sensor. If someone can see it, a steady green LED confirms the bus is in the right spot.

Preventing Resets

• Mark the stop position. A painted stop line, floor marker, or overhead sign makes it easy for drivers to stop under the sensor every time.
• Share the parking diagram with drivers and fuel lane personnel, especially new staff.
• Watch for patterns. If resets keep happening with one bus type, such as longer or articulated buses, check where that type stops relative to the sensor.
Still resetting with the bus parked correctly?
The vehicle detector itself may need attention. Check whether the green LED on the black box is flashing. A flashing LED means the black box isn’t communicating with the overhead sensor. See Checking the SRF55 Vehicle Detector for troubleshooting steps.
Questions about vehicle detector resets? Contact Fleetwatch Support.