Visual Inspection
NOTE:
Diagnosis of shift interlock system should begin with a general visual inspection. Each model is similar in function, but may be equipped with a variety of components depending upon application. Before beginning any diagnosis, refer to appropriate wiring diagram to become familiar with the system and for use as a guide to pinpoint areas of concern. See WIRING DIAGRAMS .
Inspect mechanical operation of ignition switch, gear selector assembly, shift cable/linkage and internal transmission linkage. Adjust or repair as necessary. See ADJUSTMENTS . If no mechanical problems are found, inspect all electrical components while referring to appropriate wiring diagram as a guide. Ensure all system electrical harness connections are tight and free of corrosion. Check for misrouted wires and damaged components. Ensure system fuses are good and appropriate circuits are properly grounded. Repair as necessary. Once system passes visual inspection, check system operation. See SYSTEM OPERATION CHECK .