RM38T0EC _58 Vehicle Interior _115230 THEFT DETERRENT / KEYLESS ENTRY _0606513 DIGITAL KEY SYSTEM J

THEFT DETERRENT / KEYLESS ENTRY  DIGITAL KEY SYSTEM  Digital Key Battery Charge Low is not Displayed on the Multi-information Display  


DESCRIPTION

To display a low battery voltage notification on the multi-information display in the combination meter assembly, it is necessary to set the display setting to ON in the digital key application customize settings.

If not displayed even when the display setting is set to ON, there may be a malfunction in the communication system between the combination meter assembly and certification ECU (smart key ECU assembly), the communication system between the certification ECU (smart key ECU assembly) and digital key ECU assembly, or the digital key.

WIRING DIAGRAM

B621852E40
4.156,0.854 5.375,1.042 1.219,0.188 10 false ECU-DCC NO. 2 5.365,0.625 5.677,0.823 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 5.313,1.167 5.625,1.365 0.313,0.198 10 false 23 1.708,1.156 2.021,1.354 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 0.104,2.563 0.552,2.74 0.448,0.177 10 false I222 5.208,2.573 6.052,2.854 0.844,0.281 10 false O224 5.208,2.729 7.156,2.927 1.948,0.198 10 false Digital Key ECU Assembly 5.292,1.781 5.604,1.979 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

·

Perform troubleshooting with the electrical key transmitter sub-assembly not inside the detection area of the smart entry and start system..

·

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) or digital key ECU assembly, refer to Service Bulletin.



HINT:

It is possible to check the digital key low battery warning history by using the GTS and reading the Vehicle Control History (RoB): Warning Operation History / Digital Key Low Battery Warning

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>DIGITAL KEY SYSTEM>CHECK FOR INTERMITTENT PROBLEMS


PROCEDURE

1.CHECK COMBINATION METER ASSEMBLY (Start Indicator Function)
a.

Use the GTS and set the Start Indicator Function to ON.


Entry & Start
Tester Display Description Default Setting ECU
Start Indicator Function Function that turns the entry warning light on the combination meter assembly on or off. ON $00:OFF,$01:ON Certification ECU (Smart key ECU assembly)
50006 17
b.

Turn the ignition switch off.


c.

Check that when all of the following conditions are met, the entry warning light is displayed on the multi-information display in the combination meter assembly.

·

The electrical key transmitter sub-assembly is inside the vehicle

·

The shift position is P

·

The brake pedal is depressed



Result:
Proceed to
OK
NG



OK

2.CHECK COMBINATION METER ASSEMBLY (LOW BATTERY VOLTAGE NOTIFICATION)

NG

GO TO SMART ENTRY AND START SYSTEM (for Start Function) (HOW TO PROCEED WITH TROUBLESHOOTING)

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM (for Start Function, HEV Model)>HOW TO PROCEED WITH TROUBLESHOOTING


2.CHECK COMBINATION METER ASSEMBLY (LOW BATTERY VOLTAGE NOTIFICATION)
a.

When the digital key battery voltage is low, start the hybrid control system.

NOTICE:
·

Make sure there is no electronic device that outputs high-voltage or noise inside or around the vehicle.

·

Make sure that the digital key is not covered by or touching a metal object.

·

Discharge the battery of the digital key until the low battery voltage advice is displayed.




b.

Check that the low battery voltage notification is displayed on the multi-information display in the combination meter assembly.


OK:

Low battery voltage notification is displayed


Result:
Proceed to
OK
NG



OK

3.CAUSE ANALYSIS

NG

4.CHECK ANOTHER DIGITAL KEY
3.CAUSE ANALYSIS
a.

Using the GTS, check for Vehicle Control History (RoB).


Body Electrical > Entry&Start > Utility
Tester Display
Vehicle Control History (RoB)
50005 440 62
b.

Perform cause analysis.

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>DIGITAL KEY SYSTEM>CHECK FOR INTERMITTENT PROBLEMS


c.

Take appropriate action in accordance with the result of the cause analysis.


Result:
Proceed to
NEXT



NEXT

END

4.CHECK ANOTHER DIGITAL KEY
a.

Check if there is digital key available that is already registered to the vehicle.


Result:
Result Proceed to
Another registered digital key is not available A
Another registered digital key is available B



A

5.CHECK USING ANOTHER VEHICLE

B

7.CHECK COMBINATION METER ASSEMBLY (LOW BATTERY VOLTAGE NOTIFICATION)
5.CHECK USING ANOTHER VEHICLE
a.

Check if another vehicle equipped with digital key system is available


Result:
Result Proceed to
Vehicle equipped with digital key system not available A
Vehicle equipped with digital key system available B



A

6.REGISTER NEW SHARE KEY

B

14.REGISTER NEW SHARE KEY
6.REGISTER NEW SHARE KEY
a.

Register a share key.

HINT:

Refer to the digital key application.



Result:
Proceed to
NEXT



NEXT

7.CHECK COMBINATION METER ASSEMBLY (LOW BATTERY VOLTAGE NOTIFICATION)
7.CHECK COMBINATION METER ASSEMBLY (LOW BATTERY VOLTAGE NOTIFICATION)
a.

Using another registered digital key with low battery voltage, start the hybrid control system.

NOTICE:
·

Make sure there is no electronic device that outputs high-voltage or noise inside or around the vehicle.

·

Make sure that the digital key is not covered by or touching a metal object.

·

Discharge the battery of the digital key until the low battery voltage advice is displayed.




b.

Check that the low battery voltage notification is displayed on the multi-information display in the combination meter assembly.


OK:

Low battery voltage notification is displayed


Result:
Proceed to
OK
NG



OK

END (PERFORM TROUBLESHOOTING ON ORIGINAL DIGITAL KEY)

NG

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

Using an oscilloscope, check the waveform.

B621855C62
3.396,0.229 3.823,0.448 0.427,0.219 2.75,1.833 2.917,1.833 2.917,1.833 2.917,1.083 true 3.458,0.271 4.073,0.469 0.615,0.198 10 false O224 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
O224-23 (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

9.REPLACE DIGITAL KEY ECU ASSEMBLY

B

REPLACE DIGITAL KEY ECU ASSEMBLY

C

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

D

13.INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
9.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

10.REGISTER DIGITAL KEY CODE
10.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

11.REGISTER NEW OWNER KEY
11.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

12.CHECK COMBINATION METER ASSEMBLY (LOW BATTERY VOLTAGE NOTIFICATION)
12.CHECK COMBINATION METER ASSEMBLY (LOW BATTERY VOLTAGE NOTIFICATION)
a.

Using a newly registered digital key with low battery voltage, start the hybrid control system.

NOTICE:
·

Make sure there is no electronic device that outputs high-voltage or noise inside or around the vehicle.

·

Make sure that the digital key is not covered by or touching a metal object.

·

Discharge the battery of the digital key until the low battery voltage advice is displayed.




b.

Check that the low battery voltage notification is displayed on the multi-information display in the combination meter assembly.


OK:

Low battery voltage notification is displayed


Result:
Proceed to
OK
NG



OK

END (DIGITAL KEY ECU ASSEMBLY WAS DEFECTIVE)

NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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

Disconnect the O224 digital key ECU assembly connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
O224-23 (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)

14.REGISTER NEW SHARE KEY
a.

Register the digital key with which the power source mode could not be changed to another vehicle equipped with a digital key system as the share key.

HINT:

Refer to the digital key application.



Result:
Proceed to
NEXT



NEXT

15.CHECK COMBINATION METER ASSEMBLY (LOW BATTERY VOLTAGE NOTIFICATION)
15.CHECK COMBINATION METER ASSEMBLY (LOW BATTERY VOLTAGE NOTIFICATION)
a.

Use another vehicle equipped with the digital key system, and start the hybrid control system when the digital key battery voltage is low.

NOTICE:
·

Make sure there is no electronic device that outputs high-voltage or noise inside or around the vehicle.

·

Make sure that the digital key is not covered by or touching a metal object.

·

Discharge the battery of the digital key until the low battery voltage advice is displayed.




b.

Check that the low battery voltage notification is displayed on the multi-information display in the combination meter assembly.


OK:

Low battery voltage notification is displayed


Result:
Proceed to
OK
NG



OK

9.REPLACE DIGITAL KEY ECU ASSEMBLY

NG

END (PERFORM TROUBLESHOOTING ON ORIGINAL DIGITAL KEY)