The P0590: Cruise Control Multi-Function Input ‘B’ Circuit Stuck refers to an issue where the cruise control system’s multi-function input ‘B’ circuit is stuck or unresponsive. This can be caused by a faulty switch, wiring issues, or a malfunctioning cruise control module, which can impair the functionality of the cruise control system.
P0590 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0590: Cruise Control Multi-Function Input ‘B’ Circuit Stuck |
| Is it serious? | No, but it can prevent the cruise control system from working properly. |
| Possible causes | – Faulty multi-function input ‘B’ switch – Wiring issue – Faulty cruise control module |
| How to diagnose? | – Test multi-function input ‘B’ switch – Inspect wiring and connectors – Test cruise control module |
P0590 Meaning
The P0590 code indicates that the cruise control system has detected that the multi-function input ‘B’ circuit is stuck. This could be due to a malfunctioning switch, wiring issues, or a fault in the cruise control module. This issue may lead to improper or non-responsive cruise control operation.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for additional related codes that could aid in diagnosis. | OBD-II Scanner |
| Test the Multi-Function Input ‘B’ Switch | Use a multimeter to test the multi-function input ‘B’ switch for proper functionality. | Multimeter |
| Inspect Wiring and Connectors | Inspect the wiring and connectors leading to the switch for damage, corrosion, or disconnections. | Flashlight, Multimeter |
| Test the Cruise Control Module | Verify that the cruise control module is properly processing the input signals. | Diagnostic Tool, Multimeter |
| Clear the Code and Test | After repairs, clear the code using the OBD-II scanner and test the cruise control system to confirm it is working correctly. | OBD-II Scanner, Vehicle Manual |
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I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko