THEFT DETERRENT / KEYLESS ENTRY  IMMOBILISER SYSTEM(w/o Smart Entry and Start System)  B2799  Engine Immobiliser System Malfunction  


DESCRIPTION

The ECM stores this DTC when a communication line between the ECM and transponder key ECU assembly is malfunctioning or the communication ID of the ECM and transponder key ECU assembly do not match.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B2799 Engine Immobiliser System Malfunction One of the following conditions is met:
·

Error in communication between ECM and transponder key ECU assembly.

·

Error in communication lines.

·

Communication ID is different during communication between ECM and transponder key ECU assembly.


·

Wire harness or connector

·

Transponder key ECU assembly

·

ECM


DTC Output Confirmation Operation:
·

Start the engine and wait 10 seconds.

·

After disconnecting and reconnecting the cable to the negative (-) battery terminal, turn the ignition switch to ON and wait 10 seconds.



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
B2799 -

WIRING DIAGRAM

B358353E27
1.792,0.792 2.25,0.99 0.458,0.198 10 false A40 1.792,1.5 2.25,1.698 0.458,0.198 10 false A40 2.188,0.792 2.646,0.99 0.458,0.198 10 false A56 2.177,1.5 2.635,1.698 0.458,0.198 10 false A56 1.479,1.5 1.938,1.698 0.458,0.198 10 false IMI 1.406,0.792 1.865,0.99 0.458,0.198 10 false IMO 1.844,0.583 2.302,0.781 0.458,0.198 10 false 45 1.844,1.292 2.302,1.49 0.458,0.198 10 false 28 2.25,0.583 2.708,0.781 0.458,0.198 10 false 10 2.25,1.302 2.708,1.5 0.458,0.198 10 false 11 5.188,0.688 5.646,0.885 0.458,0.198 10 false 12 5.198,1.385 5.656,1.583 0.458,0.198 10 false 13 5.458,0.792 5.917,0.99 0.458,0.198 10 false EFII 5.469,1.51 5.927,1.708 0.458,0.198 10 false EFIO 1.115,1.969 1.573,2.167 0.458,0.198 10 false ECM 5.115,1.938 5.635,2.156 0.521,0.219 10 false E99 5.115,2.094 6.5,2.438 1.385,0.344 10 false Transponder Key ECU Assembly 2.094,2.073 4.833,2.375 2.74,0.302 10 false *1: for 2ZR-FE 2.094,2.396 4.802,2.667 2.708,0.271 10 false *2: for 2NZ-FE or 1ZR-FE 1.844,1.01 2.302,1.208 0.458,0.198 10 false *1 2.26,1.01 2.719,1.208 0.458,0.198 10 false *2 1.844,1.729 2.302,1.927 0.458,0.198 10 false *1 2.24,1.729 2.698,1.927 0.458,0.198 10 false *2

CAUTION / NOTICE / HINT

NOTICE:
·

If the transponder key ECU assembly or ECM is replaced, refer to Service Bulletin.

·

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



HINT:

If transponder key ECU assembly DTCs are output simultaneously, troubleshoot the transponder key ECU assembly DTCs first.


PROCEDURE

1.CLEAR DTC
a.

Clear the DTCs.

Powertrain > Engine and ECT > Clear DTCs
50002 234

Result:
Proceed to
NEXT



NEXT

2.CHECK FOR DTC
2.CHECK FOR DTC
a.

Perform "DTC Output Confirmation Operation" procedure.


b.

Check for DTCs.

Powertrain > Engine and ECT > Trouble Codes
50001 234
OK:

B2799 is not output.



Result:
Result Proceed to
OK A
NG (DTC B2799 is output) B
NG (Other DTCs are output) C



A

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


B

3.INSPECT ECM (TERMINAL IMO)

C

GO TO DIAGNOSTIC TROUBLE CODE CHART

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>IMMOBILISER SYSTEM(w/o Smart Entry and Start System)>DIAGNOSTIC TROUBLE CODE CHART


3.INSPECT ECM (TERMINAL IMO)
a.

for 2ZR-FE

i.

Using an oscilloscope, check the waveform.

B319577C70
5.417,0.417 5.833,0.667 0.417,0.25 5.083,2.125 4.906,2.125 4.906,2.125 4.906,1.292 true 0.292,0.385 0.604,0.583 0.313,0.198 10 false *a 1.01,4.042 1.396,4.292 0.385,0.25 10 false GND 2.938,4.094 3.323,4.344 0.385,0.25 10 false *b 5.5,0.448 5.885,0.698 0.385,0.25 10 false A40 5.115,2.042 5.5,2.292 0.385,0.25 10 false IMO
*a Component with harness connected
(ECM) 		*b Waveform


Measurement Condition
Tester Connection Condition Tool Setting Specified Condition
A40-45 (IMO) - Body ground Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal 2 V/DIV., 500 ms./DIV. Pulse generation
(See waveform)



b.

for 2NZ-FE or 1ZR-FE

i.

Using an oscilloscope, check the waveform.

B352057C14
5.167,0.25 5.583,0.5 0.417,0.25 5.198,2.531 4.99,2.531 4.99,2.531 4.99,0.99 true 0.219,0.177 0.531,0.375 0.313,0.198 10 false *a 2.958,4.167 3.271,4.365 0.313,0.198 10 false *b 5.26,2.438 5.719,2.635 0.458,0.198 10 false IMO 1,4.031 1.458,4.229 0.458,0.198 10 false GND 5.24,0.292 5.604,0.51 0.365,0.219 10 false A56
*a Component with harness connected
(ECM) 		*b Waveform


Measurement Condition
Tester Connection Condition Tool Setting Specified Condition
A56-10 (IMO) - Body ground Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal 2 V/DIV., 500 ms./DIV. Pulse generation
(See waveform)



OK:

Waveform is similar to that shown in the illustration.


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



A

4.INSPECT ECM (TERMINAL IMI)

B

7.INSPECT ECM (IMO TERMINAL VOLTAGE)

C

11.REPLACE ECM
4.INSPECT ECM (TERMINAL IMI)
a.

for 2ZR-FE

i.

Using an oscilloscope, check the waveform.

B319576C39
5.417,0.417 5.833,0.667 0.417,0.25 5.25,2.063 5.115,2.063 5.115,2.063 5.115,1.188 true 0.313,0.406 0.625,0.604 0.313,0.198 10 false *a 1.01,4.042 1.427,4.302 0.417,0.26 10 false GND 3.333,4.125 3.75,4.385 0.417,0.26 10 false *b 5.292,1.979 5.708,2.24 0.417,0.26 10 false IMI 5.5,0.448 5.917,0.708 0.417,0.26 10 false A40
*a Component with harness connected
(ECM) 		*b Waveform


Measurement Condition
Tester Connection Condition Tool Setting Specified Condition
A40-28 (IMI) - Body ground Ignition switch ON 2 V/DIV., 500 ms./DIV. Pulse generation
(See waveform)



b.

for 2NZ-FE or 1ZR-FE

i.

Using an oscilloscope, check the waveform.

B352064C11
5.25,0.333 5.667,0.583 0.417,0.25 4.99,2.479 4.844,2.479 4.844,2.479 4.844,1 true 0.25,0.177 0.563,0.375 0.313,0.198 10 false *a 0.979,3.854 1.438,4.052 0.458,0.198 10 false GND 3.313,3.958 3.625,4.156 0.313,0.198 10 false *b 5.031,2.396 5.49,2.594 0.458,0.198 10 false IMI 5.333,0.365 5.792,0.563 0.458,0.198 10 false A56
*a Component with harness connected
(ECM) 		*b Waveform


Measurement Condition
Tester Connection Condition Tool Setting Specified Condition
A56-11 (IMI) - Body ground Ignition switch ON 2 V/DIV., 500 ms./DIV. Pulse generation
(See waveform)



Result:
Proceed to
OK
NG



OK

5.REGISTER ECU COMMUNICATION ID

NG

9.REPLACE TRANSPONDER KEY ECU ASSEMBLY
5.REGISTER ECU COMMUNICATION ID
a.

Register the ECU communication ID.

HINT:

Refer to Service Bulletin.



Result:
Proceed to
NEXT



NEXT

6.CHECK WHETHER ENGINE STARTS
6.CHECK WHETHER ENGINE STARTS
a.

Using a registered door control transmitter assembly, turn the ignition switch to ON.


b.

Check that the engine starts 5 seconds after the ignition switch was turned to ON.

OK:

Engine starts normally.



Result:
Proceed to
OK
NG



OK

END (COMMUNICATION ID REGISTRATION WAS DEFECTIVE)

NG

11.REPLACE ECM
7.INSPECT ECM (IMO TERMINAL VOLTAGE)
a.

for 2ZR-FE

i.
A325490C40
0.333,1 0.75,1.25 0.417,0.25 2.729,1.958 2.594,1.958 2.594,1.958 2.594,1.375 true 0.104,0.073 0.417,0.271 0.313,0.198 10 false *a 0.406,1.031 0.813,1.281 0.406,0.25 10 false A40 2.76,1.875 3.156,2.083 0.396,0.208 10 false IMO
*a Front view of wire harness connector
(to ECM)


Disconnect the A40 ECM connector.


ii.

Turn the ignition switch to ON.


iii.

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

Standard Voltage:
Tester Connection Condition Result
A40-45 (IMO) - Body ground Ignition switch turned to ON using registered door control transmitter assembly Terminal IMO stuck low (2.4 V or less)
Terminal IMO stuck high (12 V) or abnormal waveform




b.

for 2NZ-FE or 1ZR-FE

i.

Disconnect the A56 ECM connector.


ii.

Turn the ignition switch to ON.


iii.
A194151C72
0.083,2.083 0.5,2.333 0.417,0.25 2.344,1.917 2.344,3.01 2.344,3.01 2.49,3.01 true 0.542,0.469 0.854,0.667 0.313,0.198 10 false *a 2.531,2.917 2.99,3.115 0.458,0.198 10 false IMO 0.156,2.115 0.542,2.333 0.385,0.219 10 false A56
*a Front view of wire harness connector
(to ECM)


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

Standard Voltage:
Tester Connection Condition Result
A56-10 (IMO) - Body ground Ignition switch turned to ON using registered key 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 (TRANSPONDER KEY ECU ASSEMBLY - ECM)

B

11.REPLACE ECM
8.CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - ECM)
a.

for 2ZR-FE

i.

Disconnect the E99 transponder key ECU assembly connector.


ii.

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

Standard Resistance:
Tester Connection Condition Specified Condition
E99-12 (EFII) - A40-45 (IMO) Always Below 1 Ω
E99-12 (EFII) or A40-45 (IMO) - Body ground Always 10 kΩ or higher




b.

for 2NZ-FE or 1ZR-FE

i.

Disconnect the E99 transponder key ECU assembly connector.


ii.

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

Standard Resistance:
Tester Connection Condition Specified Condition
E99-12 (EFII) - A56-10 (IMO) Always Below 1 Ω
E99-12 (EFII) or A56-10 (IMO) - Body ground Always 10 kΩ or higher




Result:
Proceed to
OK
NG



OK

9.REPLACE TRANSPONDER KEY ECU ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.REPLACE TRANSPONDER KEY ECU ASSEMBLY
a.

Replace the transponder key ECU assembly with a new one.

HINT:

Refer to Service Bulletin.


NOTICE:

Key ID code registration is necessary when replacing the transponder key ECU assembly, refer to Service Bulletin.



Result:
Proceed to
NEXT



NEXT

10.CHECK WHETHER ENGINE STARTS
10.CHECK WHETHER ENGINE STARTS
a.

Using a registered door control transmitter assembly, turn the ignition switch to ON.


b.

Check that the engine starts 5 seconds after the ignition switch was turned to ON.

OK:

Engine starts normally.



Result:
Proceed to
OK
NG



OK

END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE)

NG

REPLACE ECM

for 2ZR-FE: Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>ECM>REMOVAL

for 1ZR-FE: Click hereEngine / Hybrid System>1ZR-FE ENGINE CONTROL>ECM>REMOVAL

for 2NZ-FE: Click hereEngine / Hybrid System>2NZ-FE ENGINE CONTROL>ECM>REMOVAL


11.REPLACE ECM
a.

Temporarily replace the ECM with a new one.

for 2ZR-FE: Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>ECM>REMOVAL

for 1ZR-FE: Click hereEngine / Hybrid System>1ZR-FE ENGINE CONTROL>ECM>REMOVAL

for 2NZ-FE: Click hereEngine / Hybrid System>2NZ-FE ENGINE CONTROL>ECM>REMOVAL


Result:
Proceed to
NEXT



NEXT

12.REGISTER ECU COMMUNICATION ID
12.REGISTER ECU COMMUNICATION ID
a.

Register the ECU communication ID.

HINT:

Refer to Service Bulletin.



Result:
Proceed to
NEXT



NEXT

13.CHECK WHETHER ENGINE STARTS
13.CHECK WHETHER ENGINE STARTS
a.

Using a registered door control transmitter assembly, turn the ignition switch to ON.


b.

Check that the engine starts 5 seconds after the ignition switch was turned to ON.

OK:

Engine starts normally.



Result:
Proceed to
OK
NG



OK

END (ECM WAS DEFECTIVE)

NG

REPLACE TRANSPONDER KEY ECU ASSEMBLY