System Diagnostics
The self-diagnostic capabilities of this system, if properly utilized, can simplify testing. Cruise control system is monitored by Single Board Engine Controller (SBEC). See Fig 1 .
If a problem is sensed with a monitored circuit, a fault code is stored in SBEC. Once codes are known, refer to FAULT CODES under FAULT CODES to determine questionable circuit. Test circuits and repair or replace components as required. If problem is repaired or ceases to exist, SBEC cancels that fault code after 50 ignition On/Off cycles. To clear codes, refer to CLEARING FAULT CODES .
A specific fault code results from a particular system failure. It is NOT necessarily the reason for that failure. Fault code does not condemn a specific component. Fault code calls out a probable malfunction area.