Answer Back Buzzer Circuit Troubleshooting
Answer Back Buzzer Circuit Troubleshooting1. Connect the HDS to the data link connector (DLC), and check for DTCs.
2. Turn the ignition switch ON (II).
3. Check the "CUSTOMIZE SETUP" information on the multi-information display.
Does the answer back buzzer (KEYLESS LOCK ACKNOWLEDGMENT) information indicate off?
YES - Change to ON.
NO - Go to step 4.
4. Turn the ignition switch OFF.
5. Disconnect the answer back buzzer 2P connector.
6. Check for continuity between answer back buzzer 2P connector terminal No. 2 and body ground.
Is there continuity?
YES - Go to step 7.
NO - Repair an open in the wire or poor ground (G701).
7. Disconnect the driver's under-dash fuse/relay box connector P (30P).
8. Connect answer back buzzer 2P connector terminal No. 1 to body ground with a jumper wire.
9. Check for continuity between driver's under-dash fuse/relay box connector P (30P) terminal No. 27 and body ground.
Is there continuity?
YES - Go to step 10.
NO - Repair an open in the wire.
10. Remove the jumper wire.
11. Check for continuity between driver's under-dash fuse/relay box connector P (30P) terminal No. 27 and body ground.
Is there continuity?
YES - Repair short to ground in the wire.
NO - Substitute a known-good keyless access control unit and recheck. If there is still a malfunction, MICU must be faulty, replace the driver's under-dash fuse/relay box.