Key Interlock System

Key interlock system prevents ignition key from being removed from ignition lock assembly unless shift lever is in Park. When ignition key is in ignition lock assembly, key interlock switch closes, providing voltage to key interlock solenoid and interlock control unit.

If shift lever is not in Park (parking pin switch on), interlock control unit energizes key interlock solenoid by completing ground circuit. When key interlock solenoid is energized, ignition key cannot be removed from ignition lock assembly. Key interlock switch and key interlock solenoid are located on ignition lock assembly. Parking pin switch is located on bottom of shift lever. See Fig 1 and Fig 2 .

Fig 1: Identifying Shift Lock Solenoid, Key Interlock Solenoid & Key Interlock Switch (Typical Floor Shift Models)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 2: Identifying Shift Lock Release (Typical Column Shift Models)

Courtesy of AMERICAN HONDA MOTOR CO., INC.