Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Infiniti Q60. However, it is still accessible from the selected car via links, so may be relevant.

CHECK SELF-DIAGNOSIS RESULTS
Check if any DTC other than "C1B20" is detected in "Self Diagnostic Result" of "BSW/BUZZER".

Is any DTC detected?

YES

Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to DTC Index .

NO

GO TO 2.

CHECK DRIVER ASSISTANCE BUZZER SIGNAL CIRCUIT FOR OPEN

Turn ignition switch OFF.
Disconnect the driver assistance buzzer connector.
Disconnect the driver assistance buzzer control module connector.

Check continuity between the driver assistance buzzer control module harness connector and driver assistance buzzer harness connector.

Driver assistance buzzer control module		Driver assistance buzzer		Continuity
Connector	Terminal	Connector	Terminal
M56	8	M107	1	Existed
	16		2

Is the inspection result normal?

YES

GO TO 3.

Repair the harnesses or connectors.

CHECK DRIVER ASSISTANCE BUZZER SIGNAL CIRCUIT FOR SHORT

Check continuity between the driver assistance buzzer control module harness connector and ground.

Driver assistance buzzer control module		Ground	Continuity
Connector	Terminal
M56	8		Not existed
	16

Is the inspection result normal?

YES

GO TO 4.

Repair the harnesses or connectors.

CHECK DRIVER ASSISTANCE BUZZER
Check driver assistance buzzer. Refer to Component Inspection .

Is the inspection result normal?

YES

Replace the driver assistance buzzer control module. Refer to Removal and Installation .

NO

Replace the driver assistance buzzer. Refer to Removal and Installation .