Bobcat A8006 (80-06) Fault Code: ACD/RACD Output “A” Short to Ground
Also shown on the panel as 80-06 · Also called ACD Output ‘A’ Short to Ground, ACD/RACD Output “A” Short to Ground
ACD/RACD Output “A” Short to Ground · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
Bobcat fault code A8006 (panel form 80-06) means the ACD/RACD controller commanded voltage on Output "A" but did not detect it at controller pin J1 B-5 or the return wire at pin J1 A-2. When this happens, the controller disables Output "A" until the fault is cleared and repaired.
Medium severity. Output "A" is disabled when this code sets, which means whatever attachment function relies on that output will not work. It is not an engine-damage or immediate-safety emergency by itself, but you should not run the attachment function until it is diagnosed since the controller has intentionally shut that circuit down for protection.
What does Bobcat error code A8006 mean?
A8006 is set by the ACD (Attachment Control Device) or RACD (Remote Attachment Control Device) controller when it commands voltage on Output "A" but does not see that voltage return correctly on the circuit. Specifically the controller is watching controller pin J1 B-5 (Output "A") and the return wire at controller pin J1 A-2.
This points to a short to ground somewhere between the controller and the Output "A" solenoid, in the solenoid itself, or a fault inside the controller. Because the system can't confirm the output is behaving correctly, it disables Output "A" rather than let it operate in an unknown state.
This code applies across a wide range of Bobcat excavators, skid-steers, and track loaders (E35, E42, E45, E55, S510 through S770, T550 through T870) that use the ACD/RACD attachment control system.
Common causes of A8006
- Output "A" wire at controller pin J1 B-5, or the return wire at controller pin J1 A-2, shorted to ground.
- Fault in the Output "A" solenoid itself.
- Fault in the ACD/RACD controller.
- Moisture, corrosion, or pushed-back pins in the ACD/RACD controller connectors, the mainframe harness, the attachment control harness, or the Output "A" solenoid connector.
- Intermittent condition: if the code is not active at the time of testing, the cause may not be immediately found. Probable contributors include loose connections, corrosion, pushed-back pins, the controller, the wire harness, or a combination of these.
How to troubleshoot Bobcat A8006: first checks
- With the key switch / run-enter on, check for the active code and confirm whether Output "A" function is currently disabled on the attachment.
- Inspect the ACD/RACD controller connectors, mainframe harness connectors, attachment control harness connectors, and the Output "A" solenoid connector for moisture, corrosion, or pins that have pushed back out of their sockets.
- Check the wiring from controller pin J1 B-5 (Output "A") and controller pin J1 A-2 (return wire) for chafing, pinch points, or contact with ground.
- Test the Output "A" solenoid separately to rule out an internal short before condemning the harness or controller.
- If the code is not currently active, treat it as intermittent: recheck all connectors and harness sections along the Output "A" circuit for loose or corroded connections since the fault may not reproduce during a static test.
How the code clears
Once the repair is complete, cycle the key power off and back on to clear code A8006. No separate clearing step is listed beyond cycling power.
Affected models and serial ranges
A8006 appears in our records across 20 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 |
| T750 | SN ANKA11001-A99999 |
| T770 | SN A3P811001-899999, SN A3P911001-999999 |
| T870 | SN A3PG11001-99999 |
Frequently asked questions
What does Bobcat code A8006 mean?
It means the ACD/RACD controller commanded voltage on Output "A" but did not detect it correctly at controller pin J1 B-5 or the return wire at pin J1 A-2, indicating a short to ground on that circuit. The controller responds by disabling Output "A".
Which Bobcat machines can show code A8006?
It appears on E35, E42, E45, E55 excavators and S510, S530, S550, S570, S590, S630, S650, S750, S770, T550, T590, T630, T650, T750, T770, and T870 loaders, all of which use the ACD or RACD attachment control system.
Will my attachment still work with code A8006 active?
No. When A8006 sets, Output "A" is disabled by the controller, so whatever attachment function is wired to that output will not operate until the fault is fixed.
How do I clear code A8006 after repair?
Cycle the key switch power off and back on. That is the only clearing step listed for this code.
Why does code A8006 come and go intermittently?
Intermittent A8006 codes are usually caused by loose connections, corrosion, or pushed-back pins in the connectors along the Output "A" circuit. Because the fault may not be present when you test it, thorough inspection of every connector in the circuit is needed even if the code isn't active.
What is the difference between ACD and RACD in this fault code?
ACD and RACD both refer to the attachment control system (standard and remote versions) that manages auxiliary hydraulic attachment functions. The A8006 fault and its causes are the same for both controller types.
Is code A8006 a wiring problem or a controller problem?
It can be either. The most common cause is a short to ground in the wiring or solenoid, but a fault inside the ACD/RACD controller itself can also cause this code, so both need to be checked.