Bobcat A8307 (83-07) Fault Code: ACD/RACD Output “D” Open Circuit
Also shown on the panel as 83-07 · Also called ACD Output ‘D’ Open Circuit
ACD/RACD Output “D” Open Circuit · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
Bobcat code A8307 (panel display 83-07) sets when the ACD/RACD controller cannot detect the solenoid wired to output "D" at controller pin J1 B-25, or the return wire at controller pin J1 A-27. When it sets, output "D" is disabled until the open circuit is repaired and power is cycled.
Medium severity. Output "D" is disabled while the code is active, which means whatever attachment function that output controls will not work. This is not an engine-damage or immediate-stop situation, but it does take away a function you may need for the attachment to run correctly, so it should be diagnosed before relying on that output again.
What does Bobcat error code A8307 mean?
A8307 is set by the Advanced Control Device (ACD) or Remote Advanced Control Device (RACD) controller, which manages attachment outputs on Bobcat loaders and excavators. Output "D" is one of the controller's solenoid driver circuits, and this controller expects to see a solenoid connected to that output through pin J1 B-25 (the output side) and pin J1 A-27 (the return side).
When the controller cannot detect the solenoid on that circuit, either because the wiring is open, the solenoid itself has failed, or the connection is compromised, it logs A8307 and shuts off output "D" as a protective measure. That means any attachment function wired to output "D" will stop working until the fault is found and cleared.
This code is strictly about the output "D" circuit. It does not indicate a hydraulic pressure problem or a mechanical failure in the attachment itself, only that the controller cannot confirm the solenoid is present and the circuit is complete.
Common causes of A8307
- Output "D" wiring open at controller pin J1 B-25, or the return wire open at controller pin J1 A-27.
- A failed output "D" solenoid.
- A fault in the ACD/RACD controller itself.
- Moisture, corrosion, or pushed-back pins in the ACD/RACD controller connectors, mainframe harness, attachment control harness, or the output "D" solenoid connector.
- An intermittent condition, if the fault is not present at the time of testing. In this case the cause may not be found immediately, and probable causes may include loose connections, corrosion, pushed-back pins, the controller, the wire harness, or a combination of these problems.
How to troubleshoot Bobcat A8307: first checks
- With the key switch / run-enter on, check for the code being active, then inspect the output "D" solenoid connector for moisture, corrosion, or pins that have been pushed back out of the connector body.
- Trace the wiring for output "D" back from the solenoid to controller pin J1 B-25 and check the return wire back to controller pin J1 A-27, looking for opens, chafing, or loose terminals.
- Inspect all connectors in the path: the ACD/RACD controller connectors, the mainframe harness connectors, and the attachment control harness connectors, for the same moisture, corrosion, or pushed-back pin issues.
- Test the output "D" solenoid itself to confirm it is present, wired correctly, and not internally open or failed.
- If the code is not active during testing, treat it as intermittent and recheck all connections and harness sections listed above since the fault may not reproduce on demand.
How the code clears
Once the open circuit or faulty component is repaired, clear the code by cycling key power off and back on. No separate clearing step is listed beyond a power cycle.
Affected models and serial ranges
A8307 appears in our records across 19 Bobcat models. Match your machine by model and serial number.
| Model | Serial ranges |
|---|---|
| E35 | SN A93K110001-99999, SN AC2P11001-99999 |
| E42 | SN AG3411001-99999 |
| E45 | SN AG3G11001-99999, SN AHHC11001-99999 |
| E55 | SN ARWM11001-99999, SN ASW311001-99999 |
| S510 | SN A3NJ11001-99999, SN A3NK11001-99999, SN ATZC11001-99999 |
| S530 | SN A7TV11001-99999, SN ATZD11001-99999 |
| S550 | SN A3NK11001-A3NL99999, SN A3NM11001-99999 |
| S570 | SN A7U711001-799999, SN A7U811001-899999 |
| S590 | SN ANMN11001-99999, SN ANMP11001-99999 |
| S630 | SN A3NT10001-12369, SN A3NT12370-99999, SN A3NU11001-11111, SN A3NU11112-99999 |
| S650 | SN A3NV11001-13098, SN A3NV13099-99999, SN A3NW11001-11248, SN A3NW11249-99999 |
| S750 | SN A3P211001-299999 |
| S770 | SN A39511001-99999, SN A3P411001-99999 |
| T550 | SN A7UJ11001-AJZV12276 |
| T590 | SN ALJU11001-999999, SN B37811001-999999, SN B3Z711001-999999 |
| T630 | SN A7PU11001-11663, SN A7PU11664-99999 |
| T650 | SN A3P012214-099999, SN A3P111242-199999 |
| T770 | SN A3P811001-899999, SN A3P911001-999999 |
| T870 | SN A3PG11001-99999 |
Frequently asked questions
What does Bobcat code A8307 mean?
It means the ACD/RACD controller could not detect the solenoid wired to output "D", either through the output pin (controller pin J1 B-25) or the return pin (controller pin J1 A-27). The controller disables output "D" when this happens.
What is the panel display number for A8307?
On the display panel it shows as 83-07.
Will my attachment still work with A8307 active?
The specific function wired to output "D" will not work because the controller disables that output when the code is active. Other outputs and functions are not described as affected.
What usually causes A8307?
The most common causes are an open in the output "D" wiring or return wire, a failed output "D" solenoid, a fault in the ACD/RACD controller, or moisture and corrosion in the connectors along that circuit.
How do I clear A8307 after repair?
Cycle key power off and back on. No other clearing procedure is listed for this code.
Why does A8307 come and go intermittently?
Intermittent occurrences are usually tied to loose connections, corrosion, or pushed-back pins that make and break contact. If the code is not active during testing, the cause may not be identifiable right away, and all connectors and harness sections in the output "D" circuit should still be inspected.
Which Bobcat machines can show code A8307?
It applies to the E35, E42, E45, E55, S510, S530, S550, S570, S590, S630, S650, S750, S770, T550, T590, T630, T650, T770, and T870 models.