Honda HR-V: Keyless Buzzer Circuit Troubleshooting

Testing

1. 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.

Is there continuity?

YES

The GND wire is OK. Go to step 2.

NO

Repair an open or high resistance in the ground wire or poor ground (G504).

2. Open wire check (SMART BUZZER line):

1. Disconnect the following connector.

Under-dash fuse/relay box connector D (24P)

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

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

Is there continuity?

YES

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

NO

Repair an open or high resistance in the wire.

3. Shorted wire check (SMART BUZZER line):

1. Remove the jumper wire.
2. Check for continuity between test points 1 and 2.

Is there continuity?

YES

Repair a short to ground in the wire.

NO

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

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

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

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