Keyless Buzzer Circuit Troubleshooting

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2025 Honda Odyssey, 2024 Honda Odyssey, 2023 Honda Odyssey, 2022 Honda Odyssey, and 2021 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.

Open wire check (GND line)

-1. Turn the vehicle to the OFF (LOCK) mode.

-2. Disconnect the following connector.

Keyless buzzer 3P connector

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

Test condition	Vehicle OFF (LOCK) mode Keyless buzzer 3P connector: disconnected
Test point 1	Keyless buzzer 3P connector (female terminals) No. 3:
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 (G604).

Open wire check (SMART BUZZER line)

-1. Disconnect the following connector.

Body control module connector E (24P)

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

Terminal A	Keyless buzzer 3P connector (female terminals) No. 2:
Terminal B	Body ground

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

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

Test condition	Vehicle OFF (LOCK) mode Keyless buzzer 3P connector: disconnected Keyless buzzer 3P connector: jumped to body ground Body control module connector E (24P): disconnected
Test point 1	Body control module connector E (24P) No. 22
Test point 2	Body ground

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)

-1. Remove the jumper wire from the keyless buzzer 3P connector.

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

Test condition	Vehicle OFF (LOCK) mode Keyless buzzer 3P connector: disconnected Body control module connector E (24P): disconnected
Test point 1	Body control module connector E (24P) No. 22
Test point 2	Body ground

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)
-1. Substitute a known-good keyless buzzer.

-2. Check the keyless buzzer function.

Does the keyless buzzer sound?

YES

Replace the original keyless buzzer .

NO

Replace the body control module .