RM36D0EC _58 Vehicle Interior _083094 THEFT DETERRENT / KEYLESS ENTRY _0678553 DIGITAL KEY SYSTEM J

THEFT DETERRENT / KEYLESS ENTRY  DIGITAL KEY SYSTEM  Digital Key cannot be Cleared  


DESCRIPTION

When the owner key cannot be cleared using the digital key but can be cleared using the GTS, there may be a malfunction somewhere other than the digital key and other vehicle components.

Also, when all digital keys cannot be cleared using the multi-display but can be cleared using the GTS, it is suspected that the multi-display is malfunctioning.

When the owner key cannot be cleared even after removing the cause of the malfunction which is not related to vehicle settings and vehicle components, there may be a communication system malfunction between the certification ECU (smart key ECU assembly) and digital key ECU assembly.

WIRING DIAGRAM

E544593E02
4.156,0.865 5.375,1.052 1.219,0.188 10 false ECU-DCC NO.2 5.365,0.583 5.677,0.781 0.313,0.198 10 false 1 5.552,0.719 5.802,0.917 0.25,0.198 10 false +B 5.552,1.885 6.01,2.083 0.458,0.198 10 false GND 5.563,1.313 6.177,1.51 0.615,0.198 10 false UART 5.313,1.135 5.625,1.333 0.313,0.198 10 false 23 1.708,1.135 2.021,1.333 0.313,0.198 10 false 17 1.26,1.313 1.875,1.51 0.615,0.198 10 false UAT2 0.906,3.406 3.052,3.604 2.146,0.198 10 false : UART Communication Line 0.073,2.563 0.521,2.76 0.448,0.198 10 false G170 5.208,2.552 6.052,2.833 0.844,0.281 10 false N68 5.208,2.729 7.156,2.927 1.948,0.198 10 false Digital Key ECU Assembly 5.292,1.74 5.604,1.938 0.313,0.198 10 false 10 2.385,0.719 4.073,0.938 1.688,0.219 10 false from Auxiliary Battery 0.094,2.729 3.01,2.927 2.917,0.198 10 false Certification ECU (Smart Key ECU Assembly)

CAUTION / NOTICE / HINT

NOTICE:
·

Before performing troubleshooting of the vehicle, refer to Precautions for Inspection or Registration to check for a cause of the malfunction which is not related to vehicle settings or vehicle components.

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>DIGITAL KEY SYSTEM>PRECAUTION

·

Make sure that no DTCs are output. If any DTCs are output, proceed to Diagnostic Trouble Code Chart.

·

If the digital key system has been disabled, enable the system before performing troubleshooting.

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>DIGITAL KEY SYSTEM>CUSTOMIZE PARAMETERS

·

Before replacing the certification ECU (smart key ECU assembly), refer to Service Bulletin.



PROCEDURE

1.CLEAR ALL REGISTERED DIGITAL KEYS
a.

Clear all registered digital keys using the GTS.

HINT:

Refer to Service Bulletin.


OK:

All digital keys can be cleared.



Result:
Proceed to
OK
NG



OK

2.CHECK THE SYMPTOMS

NG

3.CHECK DIGITAL KEY ECU ASSEMBLY (TERMINAL UART)
2.CHECK THE SYMPTOMS
a.

Check the problem symptoms.


Result:
Result Proceed to
Digital key could not be cleared using the digital key A
Digital key could not be cleared using the multi-display (w/ Navigation System) B
Digital key could not be cleared using the multi-display (w/o Navigation System) C



A

END (PERFORM OWNER KEY REGISTRATION)

B

GO TO NAVIGATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

Click hereAudio / Visual / Telematics>NAVIGATION / MULTI INFO DISPLAY>NAVIGATION SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING


C

GO TO AUDIO AND VISUAL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

Click hereAudio / Visual / Telematics>AUDIO / VIDEO>AUDIO AND VISUAL SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING


3.CHECK DIGITAL KEY ECU ASSEMBLY (TERMINAL UART)
a.

Using an oscilloscope, check the waveform.

E544594C02
3.365,0.208 3.854,0.479 0.49,0.271 2.75,1.833 2.917,1.833 2.917,1.833 2.917,1.083 true 3.479,0.26 4.094,0.458 0.615,0.198 10 false N68 0.813,2.427 1.427,2.625 0.615,0.198 10 false *b 2.771,3.667 3.385,3.865 0.615,0.198 10 false *c 2.771,3.948 3.385,4.146 0.615,0.198 10 false *d 3.281,3.948 3.896,4.146 0.615,0.198 10 false *e 2.156,2.74 2.771,2.938 0.615,0.198 10 false *f 3.031,2.719 3.646,2.917 0.615,0.198 10 false *g 0.667,3.813 1.281,4.01 0.615,0.198 10 false GND 2.177,0.354 2.792,0.552 0.615,0.198 10 false *a 2.323,1.75 2.938,1.948 0.615,0.198 10 false UART
*a Component with harness connected
(Digital Key ECU Assembly) 		*b Waveform
*c Wakeup signal from digital key ECU assembly *d Approximately 15 ms.
*e 15 to 50 ms. *f Before door lock/unlock operation using digital key
*g After door lock/unlock operation using digital key - -


NOTICE:

The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.


OK:
Tester Connection Condition Tool Setting Specified Condition
N68-23 (UART) - Body ground All of the following conditions are met:
·

Ignition switch off

·

Door lock/unlock operation has been not performed via digital key → performed


2 V/DIV., 20 ms./DIV. Pulse generation
(See waveform)



Result:
Result Proceed to
OK (Normal Waveform) A
NG (No Wakeup Signal) B
NG (Normal Waveform Not Output) C
NG (Stuck Low) D



A

4.REPLACE DIGITAL KEY ECU ASSEMBLY

B

REPLACE DIGITAL KEY ECU ASSEMBLY

C

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

D

8.INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
4.REPLACE DIGITAL KEY ECU ASSEMBLY
a.

Replace the digital key ECU assembly with a new one.

HINT:

Refer to Service Bulletin.



Result:
Proceed to
NEXT



NEXT

5.REGISTER DIGITAL KEY CODE
5.REGISTER DIGITAL KEY CODE
a.

Register the digital key code to the digital key ECU assembly.

HINT:

Refer to Service Bulletin.



Result:
Proceed to
NEXT



NEXT

6.REGISTER NEW OWNER KEY
6.REGISTER NEW OWNER KEY
a.

Register the owner key using the original digital key.

HINT:

Refer to the digital key application.



Result:
Proceed to
NEXT



NEXT

7.CLEAR ALL REGISTERED DIGITAL KEYS
7.CLEAR ALL REGISTERED DIGITAL KEYS
a.

Clear all registered digital keys using the digital key application.

HINT:

Refer to the digital key application.


OK:

All digital keys can be cleared.



Result:
Proceed to
OK
NG



OK

END (DIGITAL KEY ECU ASSEMBLY WAS DEFECTIVE)

NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

8.INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
a.

Disconnect the N68 digital key ECU assembly connector.


b.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
N68-23 (UART) - Body ground Ignition switch off 11 to 14 V



Result:
Proceed to
OK
NG



OK

REPLACE DIGITAL KEY ECU ASSEMBLY

NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)