RM35X0E _58 Vehicle Interior _078378 THEFT DETERRENT / KEYLESS ENTRY _0396911 ENTRY AND START SYSTEM(for Entry Function) C

THEFT DETERRENT / KEYLESS ENTRY  ENTRY AND START SYSTEM(for Entry Function)  B27A8  Open in Outside Luggage Compartment Electrical Key Antenna Circuit  


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 B27A8 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 CLG3 and CLG, or terminals CG3B and CLGB).

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B27A8 Open in Outside Luggage Compartment Electrical Key Antenna Circuit An open is detected in the circuit between the certification ECU (smart key ECU assembly) and electrical key antenna (outside luggage compartment) (CLG3 - CLG, CG3B - 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 engine switch is on (IG).


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
B27A8 Key diagnostic mode can be used to perform troubleshooting

WIRING DIAGRAM

B551976E01
1.292,1.917 1.979,2.115 0.688,0.198 10 false CLGB 1.354,0.76 1.844,0.958 0.49,0.198 10 false CLG 1.76,0.76 1.917,0.958 0.156,0.198 10 false 2 1.771,1.906 1.927,2.104 0.156,0.198 10 false 1 4.906,0.875 5.365,1.063 0.458,0.188 10 false N155 5.031,1.802 5.344,2 0.313,0.198 10 false 1 5.063,0.667 5.375,0.865 0.313,0.198 10 false 2 5.323,0.771 5.938,0.969 0.615,0.198 10 false CG3B 5.333,1.854 5.948,2.052 0.615,0.198 10 false CLG3 5.833,1.385 6.146,1.583 0.313,0.198 10 false IC 0.271,2.531 0.729,2.729 0.458,0.198 10 false e5 0.281,2.677 2.26,3.677 1.979,1 10 false Electrical Key Antenna (Outside Luggage Compartment) 5.104,2.531 6.635,3.49 1.531,0.958 10 false Certification ECU (Smart Key ECU Assembly) 6.458,2.021 6.917,2.219 0.458,0.198 10 false N156 6.531,1.802 6.844,2 0.313,0.198 10 false 18 6.25,2 6.406,2.198 0.156,0.198 10 false E 4.917,2.021 5.385,2.208 0.469,0.188 10 false N155

CAUTION / NOTICE / HINT

NOTICE:
·

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

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

·

When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start. While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

·

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))
a.

Disconnect the N155 certification ECU (smart key ECU assembly) connector.


b.

Disconnect the e5 electrical key antenna (outside luggage compartment) connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
N155-1 (CLG3) - e5-1 (CLGB) Always Below 1 Ω
N155-2 (CG3B) - e5-1 (CLG) Always Below 1 Ω



d.

Reconnect the N155 certification ECU (smart key ECU assembly) connector.


Result:
Proceed to
OK
NG



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))
B416828C70
4.521,0.292 4.927,0.521 0.406,0.229 3.25,0.281 3.656,0.51 0.406,0.229 5.354,1.99 5.188,1.229 false 3.542,2.094 3.802,1.021 false 4.344,2.083 3.906,1.01 false 4.573,0.323 5.042,0.521 0.469,0.198 10 false N156 5.354,2.031 5.667,2.229 0.313,0.198 10 false E 3.354,2.125 3.813,2.333 0.458,0.208 10 false CG3B 4.198,2.135 4.656,2.344 0.458,0.208 10 false CLG3 0.198,0.146 0.656,0.354 0.458,0.208 10 false *a 1.104,2.719 1.563,2.927 0.458,0.208 10 false *b 0.76,3.688 1.219,3.896 0.458,0.208 10 false GND 3.302,0.313 3.719,0.51 0.417,0.198 10 false N155
*a Component with harness connected
(Certification ECU (Smart Key ECU Assembly)) 		*b Waveform 1


a.

Using an oscilloscope, check the waveform.

OK:
Tester Connection Condition Tool Setting Specified Condition
N155-1 (CLG3) - N156-18 (E) Procedure:
1.

Engine switch off

2.

Electrical key transmitter sub-assembly brought outside vehicle

3.

All doors closed

4.

Luggage electrical key switch on


2 V/DIV., 500 ms/DIV. Pulse generation
(See waveform 1)
N155-2 (CG3B) - N156-18 (E) Procedure:
1.

Engine switch off

2.

Electrical key transmitter sub-assembly brought outside vehicle

3.

All doors closed

4.

Luggage electrical key switch on


2 V/DIV., 500 ms/DIV. Pulse generation
(See waveform 1)


*: For details about the entry function detection area, refer to Operation Check.

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>ENTRY AND START SYSTEM (for Entry Function)>OPERATION CHECK



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)