Cruise Control Multi-Function Input A and B Correlation
Cruise control uses two redundant multiplexed inputs (A and B) for safety. The two inputs do not agree - one reports a button press the other does not, or both report incompatible levels at the same time.
Affected components
- Cruise control stalk
- Cruise input b wiring
Common causes
- High likelihood: Stalk module ageing - drift between A and B
Diagnostic notes
- The malfunction indicator lamp may illuminate
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.