Keyless Buzzer Circuit Troubleshooting
Keyless Buzzer Circuit Troubleshooting
1.
Open wire check (GND line):

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).?
2.
Open wire check (SMART BUZZER line):

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.?
3.
Shorted wire check (SMART BUZZER line):

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.
4.
Keyless buzzer check (substitution):

Keyless buzzer check (substitution)
?1.
Substitute a known-good keyless buzzer.

?2.
Check the keyless buzzer function.

Does the keyless buzzer sound?

     
YES
     
     
     
     
NO