Keyless Buzzer Circuit Troubleshooting
- 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 No. 3 Test point 2 Body ground 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 (G503).
- 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.
Terminal A Keyless buzzer 3P connector No. 2 Terminal B Body ground - 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
Under-dash fuse/relay box connector D (24P)Test point 1 Under-dash fuse/relay box connector D (24P) No. 19 Test point 2 Body ground 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.
- Shorted wire check (SMART BUZZER line):
- 1. Remove the jumper wire.
- 2. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode.
Keyless buzzer 3P connector: disconnected.
Under-dash fuse/relay box connector D (24P)Test point 1 Under-dash fuse/relay box connector D (24P) No. 19 Test point 2 Body ground Is there continuity?
YES
Repair a short to ground in the wire.
NO
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
Faulty MICU, replace the under-dash fuse/relay box .