Suzuki Wagon R Manual page 4048

Inspection of Immobilizer Control Module and Its Circuits
Voltage Inspection
Immobilizer Control Module (1) can be checked at wiring connectors by measuring voltage.
[A]: Immobilizer Control Module connector "G17" (harness side view)
CAUTION:
Immobilizer Control Module can not be checked by itself. It is strictly prohibited to connect voltmeter
or ohmmeter to Immobilizer Control Module with coupler disconnected from it.
NOTE:
As the battery voltage affects each terminal voltage, confirm that it is 11 V or more when ignition
switch is turned to ON position.
IMMOBILIZER CONTROL SYSTEM (Z13DT ENGINE MODEL) 8G3-5