Keyless Buzzer Circuit Troubleshooting
Keyless Buzzer Circuit Troubleshooting
NOTE: Refer to the Electrical Wiring Diagrams for the location of the under-dash fuse/relay box connector.

1.
Open wire check (GND line):

Open wire check (GND line)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following 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 (G603).?
2.
Open wire check (SMART BUZZER line):

Open wire check (SMART BUZZER line)
?1.
Disconnect the following connector.

?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 Q (10P): disconnected
Test circuit
SMART BUZZER
Test point 1
Under-dash fuse/relay box connector Q (10P) No. 9 (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.?
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
OFF mode
Keyless buzzer 3P connector: disconnected
Under-dash fuse/relay box connector Q (10P): disconnected
Test circuit
SMART BUZZER
Test point 1
Under-dash fuse/relay box connector Q (10P) No. 9 (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.
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