P0589 Fault Code

Cruise Control Multi-Function Input B Circuit

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0589 fault code indicates an issue with the Cruise Control Multi-Function Input B Circuit, which is a part of the vehicle's cruise control system. This circuit is responsible for receiving signals from various controls that allow the driver to manage the cruise control feature. Failure in this circuit can lead to the cruise control system becoming inoperative.

What are the symptoms of the P0589 code?

Symptoms associated with P0589 may include:

• The cruise control system not engaging or disengaging unexpectedly.
• Warning lights illuminated on the dashboard related to cruise control.
• Noticeable abnormalities when attempting to control the cruise feature, such as jerky acceleration or failure to maintain speed.

What causes the P0589 code?

Common causes of the P0589 fault code include:

• Faulty wiring or connectors within the cruise control input circuit.
• Malfunctioning cruise control switches.
• Issues with the vehicle's Engine Control Module (ECM).
• A damaged or corroded connector in the multi-function switch.
• Interference or short circuits caused by nearby electrical components.

How to fix P0589?

To resolve the P0589 fault code, consider the following steps:

• Inspect the wiring and connectors for any visible damage or corrosion, and repair or replace as necessary.
• Test the cruise control multi-function switch for proper operation and replace it if it is faulty.
• Perform a thorough electrical check to identify any short circuits or interference.
• Clear the fault code after repairs and test the cruise control system to ensure proper functionality.