Keyless Buzzer Circuit Troubleshooting
- Open wire check (PGND 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/power tailgate outside 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 (G404).
- Open wire check (SMART BUZZER 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 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 Q (10P): disconnected
Test point 1 Under-dash fuse/relay box connector Q (10P) No. 9 - Refer to: MICU Input Test (2015-17), or MICU Input Test (2018-19) 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 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): disconnected
Test point 1 Under-dash fuse/relay box connector Q (10P) No. 9 - Refer to: MICU Input Test (2015-17), or MICU Input Test (2018-19) 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 .