Bobcat A8302 (83-02) Fault Code: ACD/RACD Output "D" Error On
Also shown on the panel as 83-02 · Also called ACD Output ‘D’ Error On
ACD/RACD Output "D" Error On · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
A8302 (panel form 83-02) sets when the ACD/RACD controller sees voltage on output "D" wire 5150 while it has not commanded that output on. The controller shuts off the electric output, the attachment on output "D" stops working, and the ACD/RACD icon on the right instrument panel blinks.
Medium severity. The affected attachment output is disabled until the fault is fixed, so the machine can usually keep working but that attachment function will not operate. It is not an engine or brake safety issue, but an unexpected short to power on an output circuit should be checked before it damages the controller or wiring.
What does Bobcat error code A8302 mean?
A8302 is Bobcat's Advanced Control Display (ACD) or Rear Advanced Control Display (RACD) fault for output "D," the circuit that runs on wire 5150 out to an attachment solenoid coil. The ACD/RACD controller expects that when it is not sending voltage to energize that solenoid, the wire should sit at no voltage. If the controller instead sees voltage present on that wire while it never told the output to turn on, it flags A8302.
When this code is active, the controller shuts off the electric output on circuit "D" as a protective measure. That means the attachment function wired to output "D" simply will not work until the fault clears. The operator will see a blinking ACD/RACD icon on the right instrument panel telling them something is wrong with an attachment output circuit.
In plain terms, this is usually a wiring problem: something is feeding power into a circuit that is supposed to be off. It could be a chafed wire touching a hot circuit, a sticking relay, or a controller output driver issue.
Common causes of A8302
- Circuit output "D" wire 5150 to the attachment solenoid is shorted to a power source, so voltage reaches the wire even when the controller has not energized it.
- A fault in the ACD/RACD controller itself, including its output driver for circuit "D."
- Moisture, corrosion, or pushed-back pins in the mainframe or attachment control harness connectors.
- An intermittent fault: if the code is not active at the time of testing, the cause may not be found right away. Probable contributors in intermittent cases include loose connections, corrosion, pushed-back pins, the controller, the wire harness, or a combination of these problems.
How to troubleshoot Bobcat A8302: first checks
- Turn the key switch to run/enter (this is the condition under which the code sets) and check whether the ACD/RACD icon on the right instrument panel is blinking, confirming the code is currently active.
- Inspect the connectors in the mainframe and attachment control harness for moisture, corrosion, or pins that have been pushed back out of their sockets.
- Trace wire 5150 from the ACD/RACD controller to the attachment solenoid, looking for chafed insulation, pinch points, or contact with a power source that could cause an unwanted short.
- Wiggle-test connectors and harness sections while watching for the icon or code status to change, since an intermittent short may not show up with the machine sitting still.
- If wiring and connectors check out clean, suspect the ACD/RACD controller output driver for circuit "D" and test or swap the controller per Bobcat's electrical test procedures.
- If the code will not reproduce at the time of testing, document it as intermittent and check the usual suspects anyway: loose connections, corrosion, pushed-back pins, harness wear, and controller condition.
How the code clears
Cycle power to clear A8302 once the repair is complete. No separate clearing step is listed beyond turning the key off and back on.
Affected models and serial ranges
A8302 appears in our records across 15 Bobcat models. Match your machine by model and serial number.
| Model | Serial ranges |
|---|---|
| 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 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 A8302 mean?
It means the ACD/RACD controller found voltage on output "D" wire 5150 when it had not sent voltage to energize the attachment solenoid on that circuit. The controller shuts off that output and the attachment function wired to "D" stops working.
Why did my attachment stop working after this code came on?
Because the ACD/RACD controller automatically shuts off the electric output on circuit "D" once it detects the unexpected voltage. This is a protective shutdown, not a separate mechanical failure of the attachment itself, though the underlying wiring problem still needs to be fixed.
What is the most common cause of A8302?
A short in output wire 5150 between the ACD/RACD controller and the attachment solenoid that lets it contact a power source, is the primary listed cause. Moisture, corrosion, or pushed-back connector pins in the mainframe or attachment control harness are also common.
How do I clear A8302 after I fix it?
Cycle the key power off and back on. That is the only clearing step listed for this code.
What if the ACD/RACD icon isn't blinking when I check it?
The fault may be intermittent. If the code is not active at the time of testing, the cause may not be identifiable right then. Check loose connections, corrosion, pushed-back pins, the wire harness, and the controller anyway, since any of these (or a combination) can cause an intermittent A8302.
Which Bobcat machines can show code A8302?
It applies across the S510, S530, S550, S570, S590, S630, S650, S750, S770 skid-steer models and the T550, T590, T630, T650, T770, T870 compact track loader models, on any of them equipped with ACD/RACD attachment control.
Is A8302 the same as the panel display code 83-02?
Yes. A8302 is the alphanumeric service code and 83-02 is the same fault shown in the numeric panel display format.