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 as follows.
If it does not operate as specified, repair applicable circuit or check actuator. If it operates as specified, go to next step.

Fig 1: Inspecting Power Door Lock System Circuit
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: Checking Voltage And Resistance Between Terminals And Body Ground
Courtesy of SUZUKI OF AMERICA CORP.

TERMINAL WIRE CIRCUIT CONDITION REFERENCE

Terminal	Wire	Circuit	Specification	Condition
L82-1	WHT/GRN	Main power supply	10 - 14 V	-
L82-10	BRN/WHT	Driver side key cylinder circuit (lock signal)	Continuity	Driver side key cylinder is lock position.
L82-10	BRN/WHT	Driver side key cylinder circuit (lock signal)	No continuity	Except the above-mentioned condition.
L82-11	BRN	Driver side key cylinder circuit (unlock signal)	Continuity	Driver side key cylinder is unlock position.
L82-11	BRN	Driver side key cylinder circuit (unlock signal)	No continuity	Except the above-mentioned condition.
L82-12	BLU/BLK	Power door lock switch circuit (lock signal)	Continuity	Power door lock switch is lock position.
L82-12	BLU/BLK	Power door lock switch circuit (lock signal)	No continuity	Except the above-mentioned condition.
L82-13	BLU/RED	Power door lock switch circuit (unlock signal)	Continuity	Power door lock switch is unlock position.
L82-13	BLU/RED	Power door lock switch circuit (unlock signal)	No continuity	Except the above-mentioned condition.
L82-14	BLK/RED	Door switch circuit	Continuity	Driver side, passenger side, rear driver side, rear passenger side or rearend door is open.
L82-14	BLK/RED	Door switch circuit	No continuity	All doors are closed.
L82-17	BLU/ORN	Ignition key remainder circuit	10 - 14 V	Ignition key is in ignition switch.
L82-17	BLU/ORN	Ignition key remainder circuit	0 - 1 V	Ignition key is not in ignition switch.
L82-18	RED/BLK	Ignition switch circuit	10 - 14 V	Ignition switch is at ON position.
L82-18	RED/BLK	Ignition switch circuit	0 - 1	V Ignition switch is at OFF position.
L82-20	BLK	Ground	0 - 1 V	-