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

THEFT DETERRENT / KEYLESS ENTRY  DIGITAL KEY SYSTEM  B27C057  Digital Key System Invalid/Incompatible Software Component  


DESCRIPTION

This DTC is output when 1 or more electrical key transmitter sub-assemblies are registered and MAC data mismatch was detected 10 times in succession from the digital key computer assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Priority Note
B27C057 Digital Key System Invalid/Incompatible Software Component 1 or more electrical key transmitter sub-assemblies are registered and MAC data mismatch was detected 10 times in succession from the digital key ECU assembly
·

Certification ECU (smart key ECU assembly)

·

Digital key ECU assembly

·

Wire harness or connector


Entry&Start A
DTC Output Confirmation Operation:

Any time



Vehicle Condition and Fail-safe Operation when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Operation when Malfunction Detected
Digital key system does not operate -

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 replacing certification ECU (smart key ECU assembly) or digital key ECU assembly, refer to Service Bulletin.

·

Inspect the fuses for circuits related to this system before performing the following procedure.



PROCEDURE

1.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - DIGITAL KEY ECU ASSEMBLY)

Pre-procedure1

a.

Disconnect the G170 certification ECU (smart key ECU assembly) connector.


b.

Disconnect the N68 digital key ECU assembly connector.


Procedure1

c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
G170-17 (UAT2) - N68-23 (UART) Always Below 1 Ω
G170-17 (UAT2) or N68-23 (UART) - Other terminals and body ground Always 10 kΩ or higher


Result:
Proceed to
OK
NG



Post-procedure1

d.

Connect the G170 certification ECU (smart key ECU assembly) connector.



OK

2.CLEAR DTC

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.CLEAR DTC
a.

Clear the DTCs.

Body Electrical > Entry&Start > Clear DTCs
50002 440
Result:
Proceed to
NEXT




NEXT

3.CHECK DTC
3.CHECK DTC
a.

Check for DTCs.

Body Electrical > Entry&Start > Trouble Codes
50001 440
Result:
Result Proceed to
B27C057 is not output A
B27C057 is output B




A

REPLACE DIGITAL KEY ECU ASSEMBLY

B

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)