Keyless Buzzer Circuit Troubleshooting (2016-17)

WARNING: This page is about a different car, the 2016 Acura RDX, 2015 Acura RDX, 2014 Acura RDX, and 2013 Acura RDX. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Refer to the Electrical Wiring Diagrams for the location of the under-dash fuse/relay box connector.

Open wire check (GND line):

Press the engine start/stop button to select the OFF mode.

- 2. Disconnect the following connector.

Keyless buzzer 3P connector

- 3. Check for continuity between test points 1 and 2.

Test condition	OFF modeKeyless buzzer 3P connector: disconnected
Test circuit	GND
Test point 1	Keyless buzzer 3P connector No. 3 (BLK)
Test point 2	Body ground

Courtesy of HONDA, U.S.A., INC.

Is there continuity?

YES

The GND wire is OK. Go to step 2.

Repair an open or high resistance in the ground wire or poor ground (G601).

Open wire check (SMART BUZZER line):

Disconnect the following connector.

Under-dash fuse/relay box connector X (10P)

- 2. Connect terminals A and B with a jumper wire.

Terminal A	Keyless buzzer 3P connector No. 2 (BRN)
Terminal B	Body ground

Courtesy of HONDA, U.S.A., INC.

- 3. Check for continuity between test points 1 and 2.

Test condition	OFF modeKeyless buzzer 3P connector: disconnectedKeyless buzzer 3P connector: jumped to body groundUnder-dash fuse/relay box connector X (10P): disconnected
Test circuit	SMART BUZZER
Test point 1	Under-dash fuse/relay box connector X (10P) No. 3 (BRN)
Test point 2	Body ground

Courtesy of HONDA, U.S.A., INC.

Is there continuity?

YES

The SMART BUZZER wire is not open. Go to step 3.

Repair an open or high resistance in the wire.

Shorted wire check (SMART BUZZER line):

Remove the jumper wire.

- 2. Check for continuity between test points 1 and 2.

Test condition	OFF modeKeyless buzzer 3P connector: disconnectedUnder-dash fuse/relay box connector X (10P): disconnected
Test circuit	SMART BUZZER
Test point 1	Under-dash fuse/relay box connector X (10P) No. 3 (BRN)
Test point 2	Body ground

Courtesy of HONDA, U.S.A., INC.

Is there continuity?

YES

Repair a short to ground in the wire.

The SMART BUZZER wire is OK. Go to step 4.

Keyless buzzer check (substitution):
Substitute a known-good keyless buzzer.

- 2. Check the keyless buzzer function.

Does the keyless buzzer sound?

YES

Replace the original keyless buzzer .

NO

Faulty MICU; replace the under-dash fuse/relay box .