Inspection of ID Controller and Its Circuit (If Equipped): Notes

ID controller and its circuit can be checked at ID controller connector by measuring voltage.

CAUTION: ID controller cannot be checked by itself. It is strictly prohibited to connect voltmeter or ohmmeter to ID controller with connector disconnected from it.

Remove ID controller.
Connect ID controller connector.

Check voltage and waveform at each terminal.

If check result is not as specified, check applicable circuit for open or short. If circuit is good condition, replace ID controller with new one.

NOTE: As each terminal voltage is affected by the battery voltage, confirm that it is 11 V or more when the ignition switch is turned to ON position.

Fig 1: Identifying ID Controller Connector Terminals

Courtesy of SUZUKI OF AMERICA CORP.

ID CONTROLLER CONNECTOR TERMINALS REFERENCE CHART

Terminal	Circuit	Normal Voltage	Condition
G29-1	Ground	Below 0.3 V	-
G29-4	CAN communication (Active High signal)	2.5 - 3.6 V	See the REFERENCE WAVEFORM
G29-5	CAN communication (Active Low signal)	1.6 - 2.5 V	See the REFERENCE WAVEFORM
G29-7	Power supply	About 12.0 V	Ignition switch at ON position
G29-8	Power supply	About 12.0 V	Ignition switch at ON position