Key Reminder Buzzer Does Not Sound

DOOR LOCK: KEY REMINDER WARNING SYSTEM: Key Reminder Buzzer does not Sound; 2013 MY FR-S [03/2012 -]
- Key Reminder Buzzer does not Sound

DESCRIPTION

The key reminder warning buzzer sounds when the driver side door is opened while the ignition switch is in the LOCK or ACC positions. The key reminder warning buzzer is activated when the main body ECU (network gateway ECU) sends a buzzer sound request signal to the combination meter assembly.

WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
Since the key reminder warning system has functions that use CAN communication, first confirm that there is no malfunction in the communication system by inspecting the CAN communication functions in accordance with How to Proceed with Troubleshooting. Then conduct the following troubleshooting procedure.

PROCEDURE

1. READ VALUE USING TECHSTREAM (D DOOR COURTESY SW)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Main Body





OK:

ON or OFF appears on the screen according to the driver door condition.

NG -- GO TO LIGHTING SYSTEM (DOOR COURTESY LIGHT SWITCH CIRCUIT) Door Courtesy Switch Circuit
OK -- Continue to next step.

2. READ VALUE USING TECHSTREAM (KEY UNLOCK WARNING SW)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Main Body





OK:

When the un-lock warning switch assembly is operated, the display changes as shown in the table.

NG -- INSPECT UN-LOCK WARNING SWITCH ASSEMBLY
OK -- Continue to next step.

3. CHECK COMBINATION METER ASSEMBLY (BUZZER OPERATION)

(a) Remove the key from the key cylinder, turn the light control switch on the headlight dimmer switch assembly to the tail position, and open the driver door.

OK:

The light reminder warning buzzer sounds.

HINT
The key reminder warning system sounds the buzzer built in to the combination meter for key reminder warnings. This buzzer is also used for the light reminder warning system. Therefore, check the operation of the combination meter buzzer by checking if the buzzer sounds to inform that the lights are still on.

NG -- REPLACE COMBINATION METER ASSEMBLY Removal

OK -- REPLACE MAIN BODY ECU (NETWORK GATEWAY ECU) Removal

4. INSPECT UN-LOCK WARNING SWITCH ASSEMBLY

(a) Remove the un-lock warning switch assembly Removal.

(b) Inspect the un-lock warning switch assembly Testing and Inspection.

NG -- REPLACE UN-LOCK WARNING SWITCH ASSEMBLY Removal
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - UN-LOCK WARNING SWITCH ASSEMBLY)

(a) Disconnect the D53 un-lock warning switch assembly connector.

(b) Disconnect the D5 main body ECU (network gateway ECU) connector.

(c) Measure the voltage and resistance according to the value(s) in the table below.









Standard Voltage:





Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU (NETWORK GATEWAY ECU) Removal