Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Read input and output signals (MODE 5): General
This test mode displays the last reason the cruise control was disengaged.
This test mode can be used when the cruise control has been disengaged even though the driver has not activated any of the system's components. The code stored will only remain in the memory until the ignition is turned off or the next time the cruise control is disengaged.
Note that the code is not identified as a diagnostic trouble code (DTC) because a code is stored even when the system is disengaged normally, for example when braking.
If the engine is turned off after a test drive the response code 2-1-4 will always be posted when the ignition is turned on even if there is no actual fault.
The following reasons for cruise control disengagement give these codes:
- safety disengagement
- gear selector in P or N
- selector switch is set to OFF
- brake valve activated
- clutch valve activated
- brake light switch activated
- supply voltage too low.
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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