KEY REMINDER WARNING SYSTEM 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 sends a key switch signal and driver side courtesy switch signal to the combination meter.

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   READ VALUE USING INTELLIGENT TESTER (FRONT DOOR COURTESY LIGHT SWITCH)

   
   

   1. Check the Data List for proper functioning of the driver side door courtesy light switch.

      Table 1. MAIN BODY

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      D Door Courtesy SW	Front door courtesy light switch signal / ON or OFF	ON: Driver side door is open OFF: Driver side door is closed	-

      OK
      ON (driver door is open) appears on the screen.

   
   
   • OKClick here
   • NGClick here
2. Click here

   READ VALUE USING INTELLIGENT TESTER (UNLOCK WARNING SWITCH)

   
   

   1. Check the Data List for proper functioning of the unlock warning switch.

      Table 2. MAIN BODY

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Key Unlock Warning SW	Unlock warning switch signal / ON or OFF	ON: Key is in ignition key cylinder OFF: No key is in ignition key cylinder	-

      OK
      ON (Key is in ignition key cylinder) appears on the screen.

   
   
   • OKClick here
   • NGClick here
3. Click here

   INSPECT UNLOCK WARNING SWITCH ASSEMBLY

   
   
   1. 

      Remove the unlock warning switch assembly (Click here).

   2. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Switch Condition Specified Condition 1 - 2 Switch free (Key removed) 10 kΩ or higher 1 - 2 Switch pushed (Key set) Below 1 Ω

   
   
   • OKClick here
   • NGClick here
4. Click here

   CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH - MAIN BODY ECU)

   
   
   1. 

      Disconnect the D16 unlock warning switch assembly and D9 ECU connectors.

   2. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition D16-1 - D9-5 (KSW) Always Below 1 Ω D16-1 - Body ground 10 kΩ or higher

   
   
   • OKClick here
   • NGClick here
5. Click here

   REPLACE INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU)

6. Click here

   INSPECT FRONT DOOR COURTESY LIGHT SWITCH (for Driver Side)

   
   
   1. 

      Remove the driver's side front door courtesy light switch (Click here).

   2. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition 1 - Switch body Courtesy switch pushed (Door closed) 10 kΩ or higher Courtesy switch free (Door open) Below 1 Ω

   
   
   • OKClick here
   • NGClick here
7. Click here

   CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH - MAIN BODY ECU)

   
   
   1. 

      Disconnect the D7 ECU connector.

   2. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Table 3. for LHD Tester Connection Condition Specified Condition O2-1 - D7-24 (DCTY) Always Below 1 Ω O2-1 - Body ground 10 kΩ or higher
      Table 4. for RHD Tester Connection Condition Specified Condition N2-1 - D7-24 (DCTY) Always Below 1 Ω N2-1 - Body ground 10 kΩ or higher

   
   
   • OKClick here
   • NGClick here
8. Click here

   REPLACE INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU)

9. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

10. Click here

    REPLACE FRONT DOOR COURTESY LIGHT SWITCH (for Driver Side)Click here

11. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

12. Click here

    REPLACE UNLOCK WARNING SWITCH ASSEMBLYClick here

13. Click here

    REPLACE COMBINATION METER ASSEMBLY