Key Reminder Buzzer Does Not Sound

DOOR LOCK: KEY REMINDER WARNING SYSTEM: Key Reminder Buzzer does not Sound

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 position. The key reminder warning buzzer is activated when the main body ECU sends a key switch signal and driver side courtesy light switch signal to the combination meter.
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 function in accordance with the "HOW TO PROCEED WITH TROUBLESHOOTING" procedures. Then, conduct the following inspection procedure.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (FRONT DOOR COURTESY LIGHT SWITCH LH)
(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) According to the display on the Techstream, read the "Data List".

Main Body





OK:
ON (driver door is open) appears on the screen.
NG -- GO TO DOOR COURTESY SWITCH CIRCUIT
OK -- Continue to next step.
2. READ VALUE USING TECHSTREAM (UNLOCK WARNING SWITCH)
(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) According to the display on the Techstream, read the "Data List".

Main Body





OK:
ON (Key is in ignition key cylinder) appears on the screen.
NG -- INSPECT UNLOCK WARNING SWITCH ASSEMBLY
OK -- Continue to next step.
3. CHECK COMBINATION METER ASSEMBLY (TAILLIGHT REMINDER WARNING BUZZER)
(a) Remove the key from the key cylinder, turn the light control switch to the tail position and open the driver side door.
OK:
The taillight reminder warning buzzer sounds.
HINT: The key reminder warning buzzer uses the same buzzer as the taillight reminder warning buzzer.

NG -- REPLACE COMBINATION METER ASSEMBLY
OK -- REPLACE MAIN BODY ECU
4. INSPECT UNLOCK WARNING SWITCH ASSEMBLY




(a) Remove the unlock warning switch Removal.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





(c) Reinstall the unlock warning switch Installation.
NG -- REPLACE UNLOCK WARNING SWITCH ASSEMBLY
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH - MAIN BODY ECU AND BODY GROUND)




(a) Disconnect the C6 unlock warning switch connector.
(b) Disconnect the 2E main body ECU (instrument panel junction block) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:





(d) Reconnect the unlock warning switch connector.
(e) Reconnect the main body ECU (instrument panel junction block) connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MAIN BODY ECU