RM38T0EC _58 Vehicle Interior _115226 DOOR LOCK _0510938 KEY REMINDER WARNING SYSTEM J

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


DESCRIPTION

The key reminder warning buzzer sounds when the driver door is opened while the ignition switch is off or ACC. The key reminder warning buzzer is activated when the main body ECU (multiplex network body ECU) sends an un-lock warning switch signal and driver door courtesy light switch signal to the combination meter assembly via CAN communication.

WIRING DIAGRAM

E479559E01
0.906,1.958 1.219,2.156 0.313,0.198 10 false O30 0.948,0.708 1.26,0.906 0.313,0.198 10 false I13 0.917,2.135 2.531,2.521 1.615,0.385 10 false Front Door Courtesy Light Switch Assembly LH 0.948,0.906 2.469,1.302 1.521,0.396 10 false Un-lock Warning Switch Assembly 2.333,1.51 2.521,1.708 0.188,0.198 10 false 1 1.083,0.344 1.271,0.542 0.188,0.198 10 false 2 2.333,0.344 2.521,0.542 0.188,0.198 10 false 1 3.073,1.427 3.385,1.625 0.313,0.198 10 false 3 4,1.417 4.188,1.635 0.188,0.219 10 false 2 3.99,0.25 4.219,0.458 0.229,0.208 10 false 16 3.042,1.625 3.354,1.823 0.313,0.198 10 false 8F 3.969,0.469 4.281,0.667 0.313,0.198 10 false I85 3.969,1.625 4.281,1.823 0.313,0.198 10 false MB 4.375,0.479 4.948,0.719 0.573,0.24 10 false KSW 4.354,1.625 4.927,1.865 0.573,0.24 10 false FLCY 5.948,2.708 7.146,3.177 1.198,0.469 10 false Combination Meter Assembly 4.188,2.719 5.854,3.146 1.667,0.427 10 false Main Body ECU (Multiplex Network Body ECU) 2.729,2.469 4.177,2.896 1.448,0.427 10 false Power Distribution Box Assembly 0.865,3.354 2.615,3.594 1.75,0.24 10 false : CAN Communication Line 1.281,0.396 1.615,0.594 0.333,0.198 10 false UN- 1.958,0.396 2.292,0.594 0.333,0.198 10 false UN+


CAUTION / NOTICE / HINT

NOTICE:

The key reminder warning system uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the key reminder warning system after confirming that the communication systems are functioning properly.

Click hereVehicle Interior>DOOR LOCK>KEY REMINDER WARNING SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING


PROCEDURE

1.PERFORM ACTIVE TEST USING GTS (BUZZER OPERATION)
a.

Perform the Active Test according to the display on the GTS.

Body Electrical > Combination Meter > Active Test
Tester Display Measurement Item Control Range Diagnostic Note
Buzzer Operation (800Hz, Vol L, W/ Damping) Combination meter buzzer
·

Frequency: 800Hz

·

Volume: Large

·

Fading tone


ON -
Body Electrical > Combination Meter > Active Test
Tester Display
Buzzer Operation (800Hz, Vol L, W/ Damping)
50004 409 13

Result:
Result Proceed to
Combination meter buzzer sounds A
Combination meter buzzer does not sound B



A

2.READ VALUE USING GTS (FL DOOR COURTESY SW STATUS)

B

REPLACE COMBINATION METER ASSEMBLY

Click hereVehicle Interior>METER / GAUGE / DISPLAY>COMBINATION METER>REMOVAL


2.READ VALUE USING GTS (FL DOOR COURTESY SW STATUS)
a.

Read the Data List according to the display on the GTS.

Body Electrical > Main Body > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
FL Door Courtesy Switch Status Front door courtesy light switch assembly LH signal Close or Open Close: Front door LH closed
Open: Front door LH open 		-
Body Electrical > Main Body > Data List
Tester Display
FL Door Courtesy Switch Status
50003 449 31
OK:

The GTS indicates ON or OFF according to the driver door conditions shown in the table.



Result:
Proceed to
OK
NG



OK

3.READ VALUE USING GTS (KEY UNLOCK WARNING SW)

NG

GO TO LIGHTING SYSTEM

Click hereVehicle Interior>LIGHTING (INT)>LIGHTING SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING


3.READ VALUE USING GTS (KEY UNLOCK WARNING SW)
a.

Read the Data List according to the display on the GTS.

Body Electrical > Main Body > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Key Unlock Warning Switch Un-lock warning switch signal OFF or ON OFF: Ignition key not inserted
ON: Ignition key inserted 		-
Body Electrical > Main Body > Data List
Tester Display
Key Unlock Warning Switch
50003 449 127
OK:

The GTS indicates ON or OFF according to whether the key is in the ignition key cylinder.



Result:
Proceed to
OK
NG



OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


NG

4.INSPECT UN-LOCK WARNING SWITCH ASSEMBLY
4.INSPECT UN-LOCK WARNING SWITCH ASSEMBLY

Click hereVehicle Interior>DOOR LOCK>UNLOCK WARNING SWITCH>INSPECTION

Result:
Proceed to
OK
NG



OK

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

NG

REPLACE UN-LOCK WARNING SWITCH ASSEMBLY

Click hereVehicle Interior>DOOR LOCK>UNLOCK WARNING SWITCH>REMOVAL


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

Disconnect the I85 main body ECU (multiplex network body ECU) connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
I85-16 (KSW) - I13-1 (UN+) Always Below 1 Ω
I13-2 (UN-) - Body ground Always Below 1 Ω
I85-16 (KSW) or I13-1 (UN+) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR