The P0577: Cruise Control Input Circuit High refers to a problem where the cruise control system detects a high voltage in the input circuit. This could be caused by a faulty input circuit, excessive voltage, or wiring issues, potentially leading to malfunction or deactivation of the cruise control system.
P0577 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0577: Cruise Control Input Circuit High |
| Is it serious? | No, but it can prevent the cruise control system from working properly. |
| Possible causes | – Faulty cruise control input circuit – High voltage in circuit – Wiring issue |
| How to diagnose? | – Test cruise control input circuit for voltage – Inspect wiring and connectors – Test cruise control module |
P0577 Meaning
The P0577 code indicates that the cruise control system is detecting a higher-than-normal voltage in the input circuit. This may be due to an electrical issue within the cruise control input circuit, a problem with the wiring, or a faulty cruise control module. If left unaddressed, this could cause the cruise control system to stop functioning.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for any other related codes that might help diagnose the issue. | OBD-II Scanner |
| Test the Cruise Control Input Circuit | Use a multimeter to check the voltage in the cruise control input circuit and ensure it is within the correct range. | Multimeter |
| Inspect Wiring and Connectors | Check the wiring and connectors related to the cruise control input circuit for any signs of damage or corrosion. | Flashlight, Multimeter |
| Test the Cruise Control Module | Test the cruise control module to ensure it is properly handling the input circuit signals. | Diagnostic Tool, Multimeter |
| Clear the Code and Test | After repairs, clear the code using the OBD-II scanner and test the vehicle to ensure the cruise control system works. | OBD-II Scanner, Vehicle Manual |
OBD-II scanner Buyer’s Guide
- Scanner features explained
- Different types of scanners
- Scanners for coding/odometer/ECU/checks
- Best picks + discount codes
Hi, I am Juraj “Yuri” Lukacko. I got frustrated by unhelpful and scammy mechanics, so I decided to learn everything about car diagnostics myself. I test dozens of new car diagnostic tools every month along with learning new strategies to fix and customize cars. About Juraj Lukacko (Yuri)