2000 Mazda Protege

SELF-DIAGNOSTIC SYSTEM
One of two on-board diagnostic modes may be utilized. The CONDITION DETECTION MODE indicates trouble in cruise control system. The OPERATION MODE checks correct input signals to the cruise control module. Modes are performed using either the New Generation Star (NGS) tester or cruise indicator light.
Perform OPERATION MODE first. If system passes all operation modes, perform CONDITION DETECTION MODE. If condition detection mode does not output any DTCs, check components in the following order: main switch, cruise control module, cruise brake switch, brakelight switch, cruise control switch, actuator, and vehicle speed sensor. See COMPONENT TESTS. If no components are defective repair wiring as necessary. See WIRING DIAGRAMS.