Keyless Buzzer Circuit Troubleshooting

Keyless Buzzer Circuit Troubleshooting 

1. 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

   Courtesy of HONDA, U.S.A., INC.

   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 (G504).

2. 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

   Courtesy of HONDA, U.S.A., INC.

   -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 groundUnder-dash fuse/relay box connector D (24P): disconnected
   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)

   -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): disconnected
   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)

   -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 .