Trunk Lock Actuator/Trunk Latch Switch Test

Open the trunk lid.
Disconnect the 4P connector from the trunk lock actuator/trunk switch.
Check for continuity between the terminals in each switch position according to the table.
Latch Switch test:

Fig 1: Latch Switch Continuity Chart
Courtesy of AMERICAN HONDA MOTOR CO., INC.

No. 3 terminal: For security system

Fig 2: Identifying Trunk Latch Switch 4P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check actuator operation by connecting power and ground according to the table.
Actuator test:

Fig 3: Trunk Latch Switch Connector Terminal Position
Courtesy of AMERICAN HONDA MOTOR CO., INC.

CAUTION: To prevent damage to the actuator, apply battery voltage only momentarily.
If the actuator fails to work properly, replace it.