Keyless Buzzer Circuit Troubleshooting

ElectronicCircuitSchematics-buttonSystemDescription-buttonKeyless Access System Description - Overview - Refer to: Keyless Access System Description - Components  or Keyless Access System Description - Control/Function  or Keyless Access System Description - System Diagram  or Keyless Access System Description - Overview  or Keyless Access System Description - Failsafe Function  Keyless Access System Description - System Diagram - Refer to: Keyless Access System Description - Components  or Keyless Access System Description - Control/Function  or Keyless Access System Description - System Diagram  or Keyless Access System Description - Overview  or Keyless Access System Description - Failsafe Function  Keyless Access System Description - Control/Function - Refer to: Keyless Access System Description - Components  or Keyless Access System Description - Control/Function  or Keyless Access System Description - System Diagram  or Keyless Access System Description - Overview  or Keyless Access System Description - Failsafe Function  Keyless Access System Description - Components - Refer to: Keyless Access System Description - Components  or Keyless Access System Description - Control/Function  or Keyless Access System Description - System Diagram  or Keyless Access System Description - Overview  or Keyless Access System Description - Failsafe Function  Keyless Access System Description - Failsafe Function - Refer to: Keyless Access System Description - Components  or Keyless Access System Description - Control/Function  or Keyless Access System Description - System Diagram  or Keyless Access System Description - Overview  or Keyless Access System Description - Failsafe Function 

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) modeKeyless buzzer 3P connector: disconnected
   Test point 1	Keyless/power tailgate outside 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 (G602).

2. Open wire check (EXT BUZ 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

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

   -3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) modeKeyless buzzer 3P connector: disconnectedUnder-dash fuse/relay box connector Q (10P): disconnected
   Test point 1	Under-dash fuse/relay box connector Q (10P) No. 9
   Test point 2	Body ground

   Is there continuity?

   YES 

   The EXT BUZ wire is not open. Go to step 3.

   NO 

   Repair an open or high resistance in the wire.

3. Shorted wire check (EXT BUZ 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) modeKeyless buzzer 3P connector: disconnectedUnder-dash fuse/relay box connector Q (10P): disconnected
   Test point 1	Under-dash fuse/relay box connector Q (10P) No. 9
   Test point 2	Body ground

   Is there continuity?

   YES 

   Repair a short to ground in the wire.

   NO 

   The EXT BUZ 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 - Refer to: Under-Dash Fuse/Relay Box Removal and Installation (2019) or Under-Dash Fuse/Relay Box Removal and Installation .