RM38T0EC _58 Vehicle Interior _115230 THEFT DETERRENT / KEYLESS ENTRY _0606512 SMART ENTRY AND START SYSTEM(for Start Function, HEV Model) C

THEFT DETERRENT / KEYLESS ENTRY  SMART ENTRY AND START SYSTEM(for Start Function, HEV Model)  B279986  Engine Immobiliser System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid  


DESCRIPTION

If there is a communication malfunction between the hybrid vehicle control ECU and ID code box (immobiliser code ECU), or when the communication ID codes do not match, the hybrid vehicle control ECU stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B279986 Engine Immobiliser System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid Either of the following conditions is met (1 trip detection logic*):
·

A malfunction is detected in the communication or communication lines between the hybrid vehicle control ECU and ID code box (immobiliser code ECU).

·

The communication ID codes of the hybrid vehicle control ECU and ID code box (immobiliser code ECU) do not match.


·

ID code box (immobiliser code ECU)

·

Hybrid vehicle control ECU

·

Wire harness or connector


DTC output confirmation operation (Perform either of the following):
·

Start the hybrid control system and wait for 10 seconds. If there is a malfunction, the hybrid control system will stop (communication begins within 3 seconds of the hybrid control system start operation being performed, and DTCs are stored after 6 seconds).

·

Connect the cable to the negative (-) auxiliary battery terminal, start the hybrid control system and wait for 10 seconds (communication begins within 3 seconds of the ignition switch being turned to ON, and DTCs are stored after 6 seconds).



*: 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
Hybrid control system cannot be started -

Related Data List and Active Test
DTC No. Data List and Active Test
B279986 -

WIRING DIAGRAM

B688450E01
5.375,3 7.094,3.573 1.719,0.573 10 false Hybrid Vehicle Control ECU 5.375,2.833 5.833,3.031 0.458,0.198 10 false I278 0.469,2.823 0.927,3.021 0.458,0.198 10 false I20 0.729,0.156 1.188,0.354 0.458,0.198 10 false +B 6.219,1.531 6.677,1.729 0.458,0.198 10 false +B 1.729,0.594 2.188,0.792 0.458,0.198 10 false EFII 1.719,1.844 2.177,2.042 0.458,0.198 10 false EFIO 2.125,0.615 2.583,0.813 0.458,0.198 10 false 3 2.125,1.833 2.583,2.031 0.458,0.198 10 false 4 5.438,0.615 5.896,0.813 0.458,0.198 10 false IMO 5.448,1.854 5.906,2.052 0.458,0.198 10 false IMI 5.125,0.604 5.583,0.802 0.458,0.198 10 false 39 5.115,1.854 5.573,2.052 0.458,0.198 10 false 53 0.469,2.979 2.052,3.396 1.583,0.417 10 false ID Code Box (Immobiliser Code ECU)

CAUTION / NOTICE / HINT

NOTICE:
·

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 Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). 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 smart 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 smart entry and start system (for Start Function) after confirming that the communication systems are functioning properly.

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

·

Before replacing the hybrid vehicle control ECU or ID code box (immobiliser code ECU), refer to Service Bulletin.

·

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

·

When the hybrid vehicle control ECU is replaced, update the ECU security key.

Click hereGeneral>SETUP>WHEN REPLACING OR REMOVING/INSTALLING PARTS>UPDATE ECU SECURITY KEY



HINT:

When DTC B279986 and the certification ECU (smart key ECU assembly) DTC are output simultaneously, first perform troubleshooting for the certification ECU (smart key ECU assembly) DTC.


PROCEDURE

1.REGISTER ECU COMMUNICATION ID
a.

Register the ECU communication ID code.

HINT:

Refer to Service Bulletin.



Result:
Proceed to
NEXT



NEXT

2.CHECK HYBRID VEHICLE CONTROL ECU (TERMINAL IMO)
2.CHECK HYBRID VEHICLE CONTROL ECU (TERMINAL IMO)
a.

Using an oscilloscope, check the waveform.

E438560C38
4.563,0.198 4.979,0.448 0.417,0.25 2.75,4.427 2.917,4.427 2.917,4.427 2.917,3.938 true 3.271,4.427 3.104,4.427 3.104,4.427 3.104,3.938 true 3.802,2.052 4.094,1.333 true 0.104,0.073 0.417,0.229 0.313,0.156 10 false *a 2.927,2.958 3.24,3.115 0.313,0.156 10 false *b 2.563,4.313 2.875,4.469 0.313,0.156 10 false *c 3.302,4.323 3.615,4.479 0.313,0.156 10 false *d 0.938,3.896 1.406,4.167 0.469,0.271 10 false GND 3.698,2.094 4.156,2.292 0.458,0.198 10 false IMO 4.646,0.229 5.083,0.469 0.438,0.24 10 false I278
*a Component with harness connected
(Hybrid Vehicle Control ECU) 		*b Waveform
*c Approximately 160 ms. *d Approximately 270 ms.


OK:
Tester Connection Condition Tool Setting Specified Condition
I278-39 (IMO) - Body ground Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery 2 V/DIV., 500 ms./DIV. Pulse generation
(See waveform)



Result:
Result Proceed to
Normal waveform A
Terminal IMO stuck low (2.4 V or less) B
Waveform not output, has abnormal wavelength or shape or Terminal IMO stuck high (12V) C



A

3.CHECK HYBRID VEHICLE CONTROL ECU (TERMINAL IMI)

B

7.CHECK HYBRID VEHICLE CONTROL ECU

C

9.CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - HYBRID VEHICLE CONTROL ECU)
3.CHECK HYBRID VEHICLE CONTROL ECU (TERMINAL IMI)
a.

Using an oscilloscope, check the waveform.

E438561C70
4.438,0.135 4.854,0.385 0.417,0.25 3.75,2.365 4.031,1.458 true 3.531,4.552 3.406,4.073 true 3.104,4.563 3.208,4.073 true 0.104,0.104 0.417,0.26 0.313,0.156 10 false *a 3.229,3.031 3.542,3.188 0.313,0.156 10 false *b 2.99,4.573 3.302,4.729 0.313,0.156 10 false *c 3.646,2.375 3.938,2.615 0.292,0.24 10 false IMI 4.521,0.167 4.958,0.406 0.438,0.24 10 false I278 3.542,4.573 3.833,4.813 0.292,0.24 10 false *d 0.875,4.031 1.292,4.24 0.417,0.208 10 false GND
*a Component with harness connected
(Hybrid Vehicle Control ECU) 		*b Waveform
*c Approximately 160 ms. *d Approximately 270 ms.


OK:
Tester Connection Condition Tool Setting Specified Condition
I278-53 (IMI) - Body ground Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery 2 V/DIV., 500 ms./DIV. Pulse generation
(See waveform)



Result:
Proceed to
OK
NG



OK

4.REGISTER ECU COMMUNICATION ID

NG

6.CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - HYBRID VEHICLE CONTROL ECU)
4.REGISTER ECU COMMUNICATION ID
a.

Register the ECU communication ID code.

HINT:

Refer to Service Bulletin.



Result:
Proceed to
NEXT



NEXT

5.CHECK WHETHER HYBRID CONTROL SYSTEM STARTS
5.CHECK WHETHER HYBRID CONTROL SYSTEM STARTS
a.

Using an electrical key transmitter sub-assembly which is registered to the vehicle, turn the ignition switch to ON.


b.

Check that the hybrid control system starts 5 seconds after the ignition switch turned to ON.

OK:

Hybrid control system starts normally.


Result:
Proceed to
OK
NG




OK

END (ECU COMMUNICATION ID HAS NOT BEEN REGISTERED)

NG

REPLACE HYBRID VEHICLE CONTROL ECU

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID VEHICLE CONTROL ECU>REMOVAL



6.CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - HYBRID VEHICLE CONTROL ECU)
a.

Disconnect the I20 ID code box (immobiliser code ECU) connector.


b.

Disconnect the I278 hybrid vehicle control ECU connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
I20-4 (EFIO) - I278-53 (IMI) Always Below 1 Ω
I20-4 (EFIO) or I278-53 (IMI) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.CHECK HYBRID VEHICLE CONTROL ECU
a.

Disconnect the I278 hybrid vehicle control ECU connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
I278-39 (IMO) - Body ground Ignition switch turned to ON using registered electrical key transmitter sub-assembly Terminal IMO stuck low (2.4 V or less)
Terminal IMO stuck high (12 V) or abnormal waveform


Result:
Result Proceed to
Terminal IMO stuck low (2.4 V or less) A
Terminal IMO stuck high (12 V) or abnormal waveform B




A

8.CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - HYBRID VEHICLE CONTROL ECU)

B

REPLACE HYBRID VEHICLE CONTROL ECU

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID VEHICLE CONTROL ECU>REMOVAL



8.CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - HYBRID VEHICLE CONTROL ECU)
a.

Disconnect the I20 ID code box (immobiliser code ECU) connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
I20-3 (EFII) - I278-39 (IMO) Always Below 1 Ω
I20-3 (EFII) or I278-39 (IMO) - Other terminals and body ground Always 10 kΩ or higher
I278-53 (IMI) - I20-4 (EFIO) Always Below 1 Ω
I278-53 (IMI) or I20-4 (EFIO) - Other terminals and body ground Always 10 kΩ or higher


Result:
Proceed to
OK
NG




OK

REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - HYBRID VEHICLE CONTROL ECU)
a.

Disconnect the I20 ID code box (immobiliser code ECU) connector.


b.

Disconnect the I278 hybrid vehicle control ECU connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
I278-39 (IMO) - I20-3 (EFII) Always Below 1 Ω
I278-39 (IMO) or I20-3 (EFII) - Other terminals and body ground Always 10 kΩ or higher


Result:
Proceed to
OK
NG




OK

REPLACE HYBRID VEHICLE CONTROL ECU

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID VEHICLE CONTROL ECU>REMOVAL



NG

REPAIR OR REPLACE HARNESS OR CONNECTOR