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: disconnectedTest point 1 Keyless buzzer 3P connector (female terminals) 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 (G702).
- Open wire check (EXT BUZ line)
-1. Disconnect the following connector.
Under-dash fuse/relay box connector Q (10P) -2. Connect terminals A and B with a jumper wire.
Terminal A Keyless buzzer 3P connector (female terminals) 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
Under-dash fuse/relay box connector Q (10P): disconnectedTest point 1 Under-dash fuse/relay box connector Q (10P) No. 9 Test point 2 Body ground Is there continuity?
YES
The EXT BUZ wire is not open. Go to step 3.
NO
Repair an open or high resistance in the wire.
- Shorted wire check (EXT BUZ 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
Under-dash fuse/relay box connector Q (10P): disconnectedTest point 1 Under-dash fuse/relay box connector Q (10P) No. 9 Test point 2 Body ground Is there continuity?
YES
Repair a short to ground in the wire.
NO
The EXT BUZ 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 .