P0589 Cruise Control Multi Function Input B Circuit

• OBD2 Code: P0589
• Description: Cruise Control Multi-Function Input B Circuit
• Definition: This code indicates a problem with the cruise control system’s multi-function input circuit, specifically related to input B. The issue could be due to a malfunctioning switch, wiring problems, or a fault in the cruise control module.

p0589 – Cruise control multi function input B circuit

Severity: Moderate

Common Causes

p0589 – Cruise control multi function input B circuit

Common causes:

• Faulty cruise control switch
• Open or short in wiring harness connected to the cruise control switch
• Corroded or loose electrical connections related to the cruise control system
• Defective cruise control module

 

Common Misdiagnosis

OBD2 Code: P0589

Description: Cruise Control Multi-Function Input B Circuit

Common Misdiagnosis: Replacing the cruise control switch without checking for wiring issues or faults in the clock spring.

 

Common Diagnostic Steps

OBD2 Code: P0589

Description: Cruise Control Multi-Function Input B Circuit

Common Diagnostic Steps:

• Check for any additional trouble codes that may be present and address them first.
• Inspect the cruise control switch for any signs of damage or wear.
• Examine the wiring and connectors related to the cruise control system for corrosion, damage, or loose connections.
• Test the voltage and ground signals at the cruise control switch using a multimeter.
• Verify that the brake light switch is functioning correctly as it can affect cruise control operation.
• If equipped, check the clock spring in the steering column for continuity issues.
• Consult the vehicle’s service manual for specific diagnostic procedures related to this code.
• If necessary, replace faulty components such as switches, wiring, or modules based on test results.