Power Door Lock System Circuit Inspection

Disconnect negative (-) cable at battery.
Disconnect door lock controller coupler (1).
Confirm that all doors are unlocked. Connect battery positive (+) and negative (-) terminals to door lock controller coupler terminals, and check door lock and unlock operation. See Fig 1 .
If it does not operate as specified, repair applicable circuit or check actuator. If it operates as specified, go to next step.

Fig 1: Checking Power Door Lock Operation
Courtesy of SUZUKI OF AMERICA CORP.
Connect negative (-) cable at battery.
Check that the voltage and resistance between the following terminals and body ground are specifications under each conditions.
If check result is OK, replace door lock controller. If check result is not as specified, repair circuit.

Fig 2: Identifying Door Lock Controller Terminals
Courtesy of SUZUKI OF AMERICA CORP.

Fig 3: Door Lock Controller Pin Voltage Chart
Courtesy of SUZUKI OF AMERICA CORP.