Bobcat D7546 (75-46) Fault Code: Right Reverse Drive Solenoid Error On
Also shown on the panel as 75-46 · Also called Drive Right Reverse Drive Solenoid Error On
Right Reverse Drive Solenoid Error On · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
D7546 (panel display 75-46) sets when the drive/drive plus controller detects voltage on the right reverse drive solenoid when it did not command that voltage. When this happens, drive functions are disabled until the fault is fixed and power is cycled.
High severity. Drive functions are disabled whenever this code is active, which means the machine cannot be driven safely or at all. It should be treated as a stop-and-diagnose issue rather than something to run through a shift.
What does Bobcat error code D7546 mean?
D7546 belongs to Bobcat's drive/drive plus electronic control system, which reads joystick signal inputs and varies voltage sent to the drive solenoids to control machine travel direction and speed. The right reverse drive solenoid is one of the outputs this controller manages.
This code means the controller has detected voltage present on the right reverse drive solenoid circuit when it did not command that solenoid to be energized. Since the controller cannot trust that the solenoid is behaving as instructed, it disables all drive functions as a safety measure until the issue is resolved.
Bobcat notes that related codes D7553, D7554, D7555, or D7556 may also appear at the same time, since they involve related drive solenoid circuits handled by the same controller.
Common causes of D7546
- Signal wire 4250 or return wire 2650 shorted to supply voltage
- Fault in the right reverse drive solenoid itself
- Fault in the drive/drive plus controller
- Moisture, corrosion, or pushed-back pins in the drive/drive plus controller connectors or in the AWS/SJC wire harness
- Loose connections, corrosion, pushed-back pins, a controller problem, a wire harness problem, or a combination of these, especially if the code is intermittent and not present at the time of testing
How to troubleshoot Bobcat D7546: first checks
- Turn the key switch to run/enter and confirm whether the code is currently active or was only stored from a past event.
- Inspect the drive/drive plus controller connectors and the AWS/SJC wire harness connectors for moisture, corrosion, or pins that have been pushed back out of their sockets.
- Check signal wire 4250 and return wire 2650 for signs of chafing, pinching, or contact with a supply voltage source that could cause a short.
- Test the right reverse drive solenoid itself for proper operation and wiring integrity.
- If the code will not stay active during testing, treat it as intermittent and focus on loose connections, corrosion, and pushed-back pins first, since these are the most common causes of intermittent drive faults.
How the code clears
Bobcat lists cycling power as the step to clear this code once the repair is complete. There is no separate reset procedure listed beyond turning the key off and back on after the underlying wiring, solenoid, or controller issue has been fixed.
Affected models and serial ranges
D7546 appears in our records across 16 Bobcat models. Match your machine by model and serial number.
| Model | Serial ranges |
|---|---|
| S510 | SN A3NJ11001-99999, SN A3NK11001-99999, SN ATZC11001-ATZC99999 |
| 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 |
| 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, SN A3PH11001-99999 |
Frequently asked questions
What does Bobcat code D7546 mean?
It means the drive/drive plus controller detected voltage on the right reverse drive solenoid circuit when it had not commanded that solenoid on. This causes the controller to disable drive functions until the fault is cleared.
Can I still drive the machine with code D7546 active?
No. Bobcat states that when this code occurs, drive functions are disabled. The machine needs to be diagnosed and repaired before normal travel operation can resume.
What is the panel display number for D7546?
On the operator display, this code shows as 75-46.
Why does my machine also show codes D7553, D7554, D7555, or D7556 with D7546?
Bobcat notes that these additional codes may be generated alongside D7546 because they involve related drive solenoid circuits managed by the same drive/drive plus controller.
How do I clear D7546 after I fix the problem?
Cycle power to the machine (key off, then back on) after completing repairs. No other reset procedure is listed for this code.
What if the code doesn't stay on when I'm testing it?
Bobcat acknowledges that this code can be intermittent. If it is not active during testing, the cause may be harder to pin down immediately. Focus your inspection on loose connections, corrosion, and pushed-back pins in the connectors and harness, since these are the most likely intermittent causes.
Which Bobcat models can show code D7546?
This code applies to the S510, S530, S550, S570, S590, S630, S650, S750, S770, T550, T590, T630, T650, T750, T770, and T870 models.