The P0589 trouble code indicates a malfunction in the cruise control multi-function input “B” circuit. The cruise control system relies on various inputs to function correctly, and the “B” circuit typically refers to an additional input, such as from a brake pedal switch or clutch pedal switch, depending on the vehicle’s configuration.
P0589 Cruise Control Multi-Function Input “B” Circuit
Code symptoms P0589.
1. Inoperative cruise control system.
2. Difficulty engaging or disengaging cruise control.
3. Cruise control functions not responding as expected.
4. Check Engine Light illuminated.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0589.
1. Faulty brake pedal switch or clutch pedal switch.
2. Wiring or connector issues in the cruise control multi-function input “B” circuit.
3. Corroded or damaged terminals in the cruise control multi-function input “B” circuit connectors.
4. Defective cruise control module.
Code Solutions P0589.
1. Inspect the brake pedal switch or clutch pedal switch for proper operation and replace if necessary.
2. Check the wiring and connectors in the cruise control multi-function input “B” circuit for damage or corrosion. Repair or replace any damaged wiring or connectors.
3. Thoroughly inspect the terminals in the cruise control multi-function input “B” circuit connectors for corrosion or damage. Clean or replace any affected terminals.
4. If all other components check out, consider replacing the cruise control module.