Keyless Buzzer Circuit Troubleshooting (2014 - 2015)
- Open wire check (GND line):
- 1. 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 mode Keyless buzzer 3P connector: disconnected Test circuit GND Test point 1 Keyless buzzer 3P connector No. 3 (BLK) 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 (G701).
- Open wire check (SMART_BUZZER line):
- 1. 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 (GRN) Terminal B Body ground - 3. Check for continuity between test points 1 and 2.
Test condition OFF mode Keyless buzzer 3P connector: disconnected Keyless buzzer 3P connector: jumped to body ground Under-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 (GRN) 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 from the keyless buzzer 3P connector.
- 2. Check for continuity between test points 1 and 2.
Test condition OFF mode Keyless buzzer 3P connector: disconnected Under-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 (GRN) 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 - Refer to: Under-Dash Fuse/Relay Box Removal and Installation (KA models with Keyless Access System), or Under-Dash Fuse/Relay Box Removal and Installation (KA KX models without Keyless Access System) .