RM36D0EC _58 Vehicle Interior _083094 THEFT DETERRENT / KEYLESS ENTRY _0402998 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

1.302,1.917 1.99,2.115 0.688,0.198 10 false CLGB 1.229,0.76 1.844,0.958 0.615,0.198 10 false ANTE8 1.76,0.75 1.917,0.948 0.156,0.198 10 false 2 1.771,1.896 1.927,2.094 0.156,0.198 10 false 1 4.927,0.875 5.271,1.094 0.344,0.219 10 false M59 5,0.646 5.313,0.844 0.313,0.198 10 false 4 5,1.802 5.313,2 0.313,0.198 10 false 3 5.302,1.885 5.917,2.083 0.615,0.198 10 false CG8B 5.302,0.729 5.917,0.927 0.615,0.198 10 false CLG8 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 Q15 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 G170 6.531,1.802 6.844,2 0.313,0.198 10 false 29 6.25,2 6.406,2.198 0.156,0.198 10 false E 4.948,2.021 5.26,2.219 0.313,0.198 10 false M59

CAUTION / NOTICE / HINT

NOTICE:: ·

The smart 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 smart entry and start system (for Entry Function) after confirming that the communication systems are functioning properly.

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·

When using the GTS with the ignition 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 the vehicle type 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

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

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

CONNECT CONNECTORS PROPERLY

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

Disconnect the M59 certification ECU (smart key ECU assembly) connector.

Disconnect the Q15 electrical key antenna (outside luggage compartment) connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
M59-4 (CLG8) - Q15-2 (ANTE8)	Always	Below 1 Ω
M59-3 (CG8B) - Q15-1 (CLGB)	Always	Below 1 Ω

Reconnect the M59 certification ECU (smart key ECU assembly) connector.

Result:

Proceed to
OK
NG

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

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

4.781,0.396 5.188,0.625 0.406,0.229 3.385,0.396 3.771,0.625 0.385,0.229 2.688,2.26 3.115,1.083 true 3.271,2.24 3.25,1.083 true 4.615,2.26 4.604,1.271 true 4.823,0.438 5.281,0.635 0.458,0.198 10 false G170 0.792,4.25 1.25,4.448 0.458,0.198 10 false GND 3.833,4.25 4.292,4.448 0.458,0.198 10 false GND 3.458,0.438 3.917,0.635 0.458,0.198 10 false M59 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	-	-

Using an oscilloscope, check the waveform.

OK:

Tester Connection	Condition	Tool Setting	Specified Condition
M59-4 (CLG8) - G170-29 (E)	Procedure: 1. Ignition switch off 2. Electrical key transmitter sub-assembly brought outside vehicle 3. All doors closed 4. Back door opener switch assembly off → on	2 V/DIV., 500 ms/DIV.	Pulse generation (See waveform 1)
M59-3 (CG8B) - G170-29 (E)	Procedure: 1. Ignition switch off 2. Electrical key transmitter sub-assembly brought outside vehicle 3. All doors closed 4. Back door opener switch assembly off → on	2 V/DIV., 500 ms/DIV.	Pulse generation (See waveform 2)

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

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Result:

Proceed to
OK
NG

REPLACE ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE COMPARTMENT)

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REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)