RM35X0E _58 Vehicle Interior _078378 THEFT DETERRENT / KEYLESS ENTRY _0386642 IMMOBILISER SYSTEM C

THEFT DETERRENT / KEYLESS ENTRY  IMMOBILISER SYSTEM  B2784  Antenna Coil Open / Short  


DESCRIPTION

When an open or short circuit is detected in the antenna coil built into the transponder key coil, the transponder key ECU assembly stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B2784 Antenna Coil Open / Short The antenna coil in the transponder key coil is open/shorted.
·

Wire harness or connector

·

Transponder key coil

·

Transponder key ECU assembly


DTC Output Confirmation Operation:

Insert the door control transmitter assembly into the ignition key cylinder.



Vehicle Condition and Fail-safe Operation when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Operation when Malfunction Detected
Engine cannot be started -

Related Data List and Active Test
DTC No. Data List and Active Test
B2784 Antenna Coil Status

WIRING DIAGRAM

E318145E37
4.052,0.969 4.667,1.167 0.615,0.198 10 false ANT1 4.063,1.885 4.677,2.083 0.615,0.198 10 false ANT2 3.802,0.969 4.417,1.167 0.615,0.198 10 false 2 3.802,1.875 4.417,2.073 0.615,0.198 10 false 3 1.49,0.969 2.104,1.167 0.615,0.198 10 false ANT1 1.469,1.885 2.083,2.083 0.615,0.198 10 false ANT2 0.667,2.479 1.281,2.677 0.615,0.198 10 false N65 0.667,2.615 2.469,2.833 1.802,0.219 10 false Transponder Key Coil 6.031,1.385 6.646,1.583 0.615,0.198 10 false IC 6.083,0.406 6.698,0.604 0.615,0.198 10 false 5 V 4.24,3.01 4.854,3.208 0.615,0.198 10 false N66 4.229,3.167 6.896,3.365 2.667,0.198 10 false Transponder Key ECU Assembly 2,0.979 2.615,1.177 0.615,0.198 10 false 1 2.01,1.906 2.625,2.104 0.615,0.198 10 false 5

CAUTION / NOTICE / HINT

NOTICE:
·

Before replacing the transponder key ECU assembly, refer to the Service Bulletin.

·

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



PROCEDURE

1.CHECK CONNECTION OF CONNECTOR
a.

Check that the connector is properly connected to the transponder key coil.


Result:
Proceed to
NEXT



NEXT

2.CLEAR DTC
2.CLEAR DTC
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Immobiliser / Trouble Codes.


e.

Clear the DTCs.

Body Electrical > Immobiliser > Clear DTCs
50002 260

Result:
Proceed to
NEXT



NEXT

3.CHECK FOR DTC
3.CHECK FOR DTC
a.

Perform "DTC Output Confirmation Operation" procedure.


b.

Enter the following menus: Body Electrical / Immobiliser / Trouble Codes.


c.

Check for DTCs.

Body Electrical > Immobiliser > Trouble Codes
50001 260

Result:
Result Proceed to
B2784 is not output A
B2784 is output B



A

END (CONNECTOR WAS NOT CONNECTED PROPERLY)

B

4.CHECK TRANSPONDER KEY COIL (OUTPUT)
4.CHECK TRANSPONDER KEY COIL (OUTPUT)
a.

Disconnect the N65 transponder key coil connector.


b.

Using an oscilloscope, check the waveform.

E369693C06
2.427,0.063 2.875,0.313 0.448,0.25 3.104,1.052 3.375,0.708 false 4.167,1.083 3.833,0.698 false 0.219,0.094 0.531,0.292 0.313,0.198 10 false *a 0.594,1.375 0.906,1.573 0.313,0.198 10 false *b 0.604,3.583 0.917,3.781 0.313,0.198 10 false *c 6.594,2.958 6.979,3.188 0.385,0.229 10 false GND 6.594,5.115 6.979,5.344 0.385,0.229 10 false GND 2.521,0.115 2.906,0.344 0.385,0.229 10 false N65 4.063,1.125 4.542,1.365 0.479,0.24 10 false ANT1 2.917,1.094 3.396,1.333 0.479,0.24 10 false ANT2
*a Rear view of wire harness connector
(to Transponder Key Coil) 		*b Waveform 1
*c Waveform 2 - -


OK
Tester Connection Condition Tool Setting Specified Condition
N65-1 (ANT1) - Body ground Within 3 seconds of inserting door control transmitter assembly into ignition key cylinder 20 V/DIV., 2 s./DIV. Pulse generation
(See waveform 1)
N65-5 (ANT2) - Body ground Within 3 seconds of inserting door control transmitter assembly into ignition key cylinder 20 V/DIV., 2 s./DIV. Pulse generation
(See waveform 2)

OK:

Waveform is similar to that shown in the illustration.



Result:
Proceed to
OK
NG



OK

REPLACE TRANSPONDER KEY COIL

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>TRANSPONDER KEY AMPLIFIER>REMOVAL


NG

5.CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - TRANSPONDER KEY COIL)
5.CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - TRANSPONDER KEY COIL)
a.

Disconnect the N66 transponder key ECU assembly connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
N66-2 (ANT1) - N65-1 (ANT1) Always Below 1 Ω
N66-3 (ANT2) - N65-5 (ANT2) Always Below 1 Ω
N66-2 (ANT1) or N65-1 (ANT1) - Other terminals and body ground Always 10 kΩ or higher
N66-3 (ANT2) or N65-5 (ANT2) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE TRANSPONDER KEY ECU ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR