The auto idle does not function, it will not start without moving the throttle arm, and it will not shut off with the key: what should I check?
Short Answer
That symptom group usually points to water intrusion or an electrical control fault, not a stepper motor guess by itself. Check controller power and ground, throttle-motor wiring, key-off shutdown command, and connector corrosion before ordering another controller. If the machine was submerged or heavily wet, the harness and plugs deserve equal suspicion.
What To Check
- Inspect the controller area, throttle-motor plug, and nearby harness branches for water, corrosion, or green pins before replacing electronic parts.
- Verify the controller is sending throttle and shutdown commands, because no auto idle plus no normal shutdown often means the control circuit is not completing correctly.
- Match any replacement controller or throttle-control part by machine serial number, old label, connector style, and adjustment procedure.
Related JIAJUE Parts
Send the machine model, serial number, old part label, and clear photos before ordering so JIAJUE PARTS can help reduce wrong electrical-part fitment.
Source Record
This question was selected from a Google-visible heavy-equipment forum result for the keyword kobelco sk70 throttle not working. The answer is rewritten from JIAJUE parts-matching and field-diagnosis experience, not copied from Google or any source page.
