RM35X0E _58 Vehicle Interior _078378 THEFT DETERRENT / KEYLESS ENTRY _0397001 ENTRY AND START SYSTEM(for Start Function) C

THEFT DETERRENT / KEYLESS ENTRY  ENTRY AND START SYSTEM(for Start Function)  B2784  Antenna Coil Open / Short  


DESCRIPTION

When an open or short circuit is detected in the transponder key amplifier coil built into the engine switch, the certification ECU (smart key ECU assembly) stores this DTC. This DTC is also stored as a history DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B2784 Antenna Coil Open / Short The transponder key amplifier coil built into the engine switch is open (see below) or shorted (determined by communication with certification ECU (smart key ECU assembly)) (1 trip detection logic*).
·

Engine switch

·

Certification ECU (smart key ECU assembly)


DTC Output Confirmation Operation:

With the shift state park (P) and the electrical key transmitter sub-assembly held near the engine switch, an engine start operation is performed by pressing and holding the engine switch when the transmitter battery is depleted.



*: Only output while a malfunction is present.


Vehicle Condition and Fail-safe Operation when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Operation when Malfunction Detected
Engine cannot be started when transmitter battery is depleted by holding electrical key transmitter sub-assembly near engine switch and pressing and holding engine switch with shift state park (P). -

Related Data List and Active Test
DTC No. Data List and Active Test
B2784 -

WIRING DIAGRAM

B463088E40
0.26,3.25 2.25,3.448 1.99,0.198 10 false Engine Switch 0.271,3.104 2.26,3.302 1.99,0.198 10 false N162 5.271,3.25 6.792,3.698 1.521,0.448 10 false Certification ECU (Smart Key ECU Assembly) 5.281,3.094 6.625,3.417 1.344,0.323 10 false N156 5.24,2.323 5.854,2.583 0.615,0.26 10 false AGND 5.24,1.823 5.854,2.083 0.615,0.26 10 false CODE 5.25,1.188 5.865,1.448 0.615,0.26 10 false TXCT 5.25,0.677 5.865,0.938 0.615,0.26 10 false VC5 5.917,1.458 6.531,1.719 0.615,0.26 10 false 5 V 5.927,0.125 6.542,0.385 0.615,0.26 10 false 5 V 1.427,2.302 2.042,2.563 0.615,0.26 10 false AGND 1.427,1.813 2.042,2.073 0.615,0.26 10 false CODE 1.469,1.281 2.083,1.542 0.615,0.26 10 false TXCT 1.542,0.771 2.156,1.031 0.615,0.26 10 false VC5 1.906,2.302 2.198,2.552 0.292,0.25 10 false 6 1.917,1.802 2.208,2.052 0.292,0.25 10 false 8 1.917,1.188 2.208,1.438 0.292,0.25 10 false 7 1.906,0.656 2.198,0.906 0.292,0.25 10 false 10 4.99,2.323 5.281,2.573 0.292,0.25 10 false 11 5.052,1.813 5.344,2.063 0.292,0.25 10 false 6 5.063,1.188 5.354,1.438 0.292,0.25 10 false 5 5.073,0.667 5.365,0.917 0.292,0.25 10 false 7

CAUTION / NOTICE / HINT

NOTICE:
·

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.

·

The entry and start system (for Start 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 Start 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

·

Before replacing the certification ECU (smart 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 ENGINE SWITCH
a.

Using an oscilloscope, check the waveform.

B363541C77
1.458,0.958 1.813,1.177 0.354,0.219 1.344,2.896 1.635,2.896 1.635,2.896 1.635,2.156 true 2.198,2.896 1.875,2.896 1.875,2.896 1.875,2.156 true 0.74,1.083 1.052,1.24 0.313,0.156 10 false *a 3.385,0.281 3.698,0.438 0.313,0.156 10 false *b 3.406,2.052 3.719,2.208 0.313,0.156 10 false *c 6.49,1.333 7.031,1.563 0.542,0.229 10 false GND 6.49,3.115 7.031,3.344 0.542,0.229 10 false GND 2.26,2.813 2.802,3.042 0.542,0.229 10 false AGND 0.917,2.823 1.458,3.052 0.542,0.229 10 false CODE 1.469,0.979 2.01,1.208 0.542,0.229 10 false N162
*a Component with harness connected
(Engine Switch) 		*b Waveform
*c Waveform (detail) - -


OK:
Tester Connection Condition Tool Setting Specified Condition
N162-8 (CODE) - N162-6 (AGND) Engine switch off, engine switch pressed with electrical key transmitter sub-assembly held near engine switch* 2 V/DIV., 20 ms./DIV. Pulse generation
(See waveform)
2 V/DIV., 100 μs./DIV. Pulse generation
(See waveform (detail))


HINT:

*: Remove the transmitter battery before performing this inspection.


OK:

The waveform is similar to that shown in the illustration



Result:
Proceed to
OK
NG



OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPLACE ENGINE SWITCH

for 7GR-FKS:

Click hereEngine / Hybrid System>7GR-FKS (STARTING)>ENGINE SWITCH>REMOVAL

for 1GD-FTV:

Click hereEngine / Hybrid System>1GD-FTV (STARTING)>ENGINE SWITCH>REMOVAL