RM38N0EC _58 Vehicle Interior _111832 THEFT DETERRENT / KEYLESS ENTRY _0509383 SMART ENTRY AND START SYSTEM(for Entry Function, Gasoline Model) C

THEFT DETERRENT / KEYLESS ENTRY  SMART ENTRY AND START SYSTEM(for Entry Function, Gasoline Model)  B27A813  Outside Luggage Compartment (Back Door) Electrical key Antenna Circuit Open  


DESCRIPTION

The certification ECU (smart key ECU assembly) generates a request signal and transmits the signal to the electrical key antenna (outside luggage compartment). For the electrical key antenna (outside luggage compartment) to detect when the electrical key transmitter sub-assembly is brought close to the vehicle, the received request signal is transmitted within approximately 1 m (3.28 ft.) of the back door. DTC B27A813 is stored by the certification ECU (smart key ECU assembly) when an open is detected between the certification ECU (smart key ECU assembly) and electrical key antenna (outside luggage compartment) (between terminals CLG8 and ANTE8, or terminals CG8B and CLGB).

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B27A813 Outside Luggage Compartment (Back Door) Electrical key Antenna Circuit Open An open is detected in the circuit between the certification ECU (smart key ECU assembly) and electrical key antenna (outside luggage compartment) (CLG8 - ANTE8, CG8B - CLGB) (1 trip detection logic*).
·

Certification ECU (smart key ECU assembly)

·

Electrical key antenna (outside luggage compartment)

·

Harness or connector


DTC Output Confirmation Operation:

Any time



*: Only output while a malfunction is present and the ignition switch is ON.


Vehicle Condition and Fail-safe Operation when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Operation when Malfunction Detected
Entry lock/unlock operation cannot be performed for back door -

Related Data List and Active Test
DTC No. Data List and Active Test
B27A813 Key diagnostic mode can be used to perform troubleshooting

WIRING DIAGRAM

B510754E86
1.208,0.771 1.688,0.958 0.479,0.188 10 false ANTE8 1.24,1.917 1.802,2.073 0.563,0.156 10 false ANTB8 4.979,0.865 5.292,1.031 0.313,0.167 10 false K6 4.979,2.01 5.302,2.219 0.323,0.208 10 false K6 5.323,0.771 5.719,0.948 0.396,0.177 10 false CLG8 5.323,1.906 5.719,2.083 0.396,0.177 10 false CG8B 5.844,1.375 6.052,1.542 0.208,0.167 10 false IC 6.281,2.01 6.438,2.177 0.156,0.167 10 false E 6.49,2.01 6.792,2.177 0.302,0.167 10 false E52 1.771,0.771 1.896,0.938 0.125,0.167 10 false 2 1.76,1.917 1.885,2.083 0.125,0.167 10 false 1 5.021,0.688 5.24,0.865 0.219,0.177 10 false 4 5.01,1.833 5.229,2.01 0.219,0.177 10 false 3 0.354,2.729 2.333,3.25 1.979,0.521 10 false Electrical Key Antenna (Outside Luggage Compartment) 0.365,2.542 0.729,2.75 0.365,0.208 10 false S10 5.01,2.573 6.552,3.219 1.542,0.646 10 false Certification ECU (Smart Key ECU Assembly) 6.542,1.833 6.76,2.01 0.219,0.177 10 false 29

CAUTION / NOTICE / HINT

NOTICE:
·

When using the GTS with the ignition switch off, perform lock and unlock operations using the door control switch of the multiplex network master switch assembly at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins, and then select the vehicle model manually.

Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start (CAN). While using the GTS, periodically perform lock and unlock operations using the door control switch of the multiplex network master switch assembly at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

·

The smart entry and start system (for Entry Function) uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart entry and start system (for Entry Function) after confirming that the communication systems are functioning properly.

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

·

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

·

After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".



PROCEDURE

1.CHECK CONNECTOR CONNECTION
a.

Check that the connectors are properly connected to the certification ECU (smart key ECU assembly) and electrical key antenna (outside luggage compartment).

OK:

Connectors are properly connected.



Result:
Proceed to
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE COMPARTMENT))

NG

CONNECT CONNECTORS PROPERLY

2.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE COMPARTMENT))

Pre-procedure1

a.

Disconnect the K6 certification ECU (smart key ECU assembly) connector.


b.

Disconnect the S10 electrical key antenna (outside luggage compartment) connector.


Procedure1

c.

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

Standard Resistance:
Tester Connection Condition Specified Condition

Click Location & Routing(K6,S10)Location & Routing

Click Connector(K6)Instrument Panel>Floor Wire>Smart Key ECU Assembly

Click Connector(S10)Body>No. 2 Luggage Room Wire / No. 3 Luggage Room Wire>Electrical Key Antenna (Outside Luggage Compartment)

K6-4 (CLG8) - S10-2 (ANTE8) Always Below 1 Ω
K6-3 (CG8B) - S10-1 (ANTB8) Always Below 1 Ω


Result:
Proceed to
OK
NG



Post-procedure1

d.

Reconnect the K6 certification ECU (smart key ECU assembly) connector.



OK

3.CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE COMPARTMENT))

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE COMPARTMENT))
B581657C01
4.781,0.396 5.135,0.625 0.354,0.229 3.385,0.396 3.74,0.625 0.354,0.229 2.688,2.26 3.115,1.083 false 3.271,2.24 3.25,1.083 false 4.615,2.26 4.604,1.271 false 4.844,0.438 5.302,0.635 0.458,0.198 10 false E52 0.594,4.281 1.052,4.479 0.458,0.198 10 false GND 3.771,4.292 4.229,4.49 0.458,0.198 10 false GND 3.479,0.438 3.938,0.635 0.458,0.198 10 false K6 4.594,2.323 5.052,2.521 0.458,0.198 10 false E 2.521,2.292 2.979,2.49 0.458,0.198 10 false CLG8 3.146,2.281 3.604,2.479 0.458,0.198 10 false CG8B 0.823,3.552 1.281,3.75 0.458,0.198 10 false *b 3.948,3.594 4.406,3.792 0.458,0.198 10 false *c 0.281,0.125 0.74,0.323 0.458,0.198 10 false *a
*a Component with harness connected
(Certification ECU (Smart Key ECU Assembly)) 		*b Waveform 1
*c Waveform 2 - -


a.

Using an oscilloscope, check the waveform.

OK:
Tester Connection Condition Tool Setting Specified Condition

Click Location & Routing(K6,E52)Location & Routing

Click Connector(K6)Instrument Panel>Floor Wire>Smart Key ECU Assembly

Click Connector(E52)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Smart Key ECU Assembly

K6-4 (CLG8) - E52-29 (E) Procedure:
1.

Ignition switch off

2.

Electrical key transmitter sub-assembly brought outside vehicle

3.

All doors closed

4.

License plate light assembly with back door opener switch off → on


2 V/DIV., 500 ms./DIV. Pulse generation
(See waveform 1)
K6-3 (CG8B) - E52-29 (E) Procedure:
1.

Ignition switch off

2.

Electrical key transmitter sub-assembly brought outside vehicle

3.

All doors closed

4.

License plate light assembly with back door opener switch off → on


2 V/DIV., 500 ms./DIV. Pulse generation
(See waveform 2)



Result:
Proceed to
OK
NG



OK

REPLACE ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE COMPARTMENT)

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>ELECTRICAL KEY OSCILLATOR (for Outside Luggage Compartment)>REMOVAL


NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)