Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM1000000028KBX |
Model Year Start: 2023 |
Model: GR Corolla |
Prod Date Range: [09/2022 - 11/2022] |
Title: THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (w/o Smart Key System): B279986,B2799; Engine Immobiliser System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid; 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022] |
DTC
|
B279986
|
Engine Immobiliser System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid
|
DTC
|
B2799
|
Engine Immobiliser System Malfunction
|
DESCRIPTION
-
The hybrid vehicle control ECU stores this DTC when a communication line between the hybrid vehicle control ECU and transponder key ECU assembly is malfunctioning or the communication ID of the hybrid vehicle control ECU and transponder key ECU assembly do not match.*1
-
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.*2
-
*1: for HV Model
-
*2: for Gasoline Model
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 (-) auxiliary battery terminal, turn the ignition switch to ON and wait 10 seconds.
|
B279986
|
Engine Immobiliser System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid
|
One of the following conditions is met:
-
Error in communication between hybrid vehicle control ECU and transponder key ECU assembly.*1
-
Error in communication between ECM and transponder key ECU assembly.*2
-
Error in communication lines.
-
Communication ID is different during communication between hybrid vehicle control ECU and transponder key ECU assembly.*1
-
Communication ID is different during communication between ECM and transponder key ECU assembly.*2
|
-
Wire harness or connector
-
Transponder key ECU assembly
-
hybrid vehicle control ECU*1
-
ECM*2
|
DTC Output Confirmation Operation:
-
Start the engine and wait 10 seconds.
-
After disconnecting and reconnecting the cable to the negative (-) auxiliary battery terminal, turn the ignition switch to ON and wait 10 seconds.
|
-
*1: for HV Model
-
*2: for Gasoline Model
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*1
-
Engine cannot be started*2
|
-
|
-
*1: for HV Model
-
*2: for Gasoline Model
Related Data List and Active Test
DTC No.
|
Data List and Active Test
|
B2799*1
|
-
|
B279986*2*3
|
-
|
-
*1: for 2ZR-FAE
-
*2: for M20A-FKS
-
*3: for 2ZR-FXE
WIRING DIAGRAM
for HV Model
for Gasoline Model
CAUTION / NOTICE / HINT
HINT:
If transponder key ECU assembly DTCs are output simultaneously, troubleshoot the transponder key ECU assembly DTCs first.
PROCEDURE
1.
|
REGISTER ECU COMMUNICATION ID
|
(a) Reregister the ECU communication ID.
Result
|
Proceed to
|
for HV Model
|
A
|
for Gasoline Model
|
B
|
A
|
|
|
2.
|
INSPECT HYBRID VEHICLE CONTROL ECU (TERMINAL IMO)
|
(a) Using an oscilloscope, check the waveform.
*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
|
I3-39 (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 (-) auxiliary battery terminal
|
2 V/DIV., 500 ms./DIV.
|
Pulse generation
(See waveform)
|
OK:
Waveform is similar to that shown in the illustration.
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
|
|
|
3.
|
INSPECT HYBRID VEHICLE CONTROL ECU (TERMINAL IMI)
|
(a) Using an oscilloscope, check the waveform.
*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
|
I3-53 (IMI) - 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 (-) auxiliary battery terminal
|
2 V/DIV., 500 ms./DIV.
|
Pulse generation
(See waveform)
|
OK:
Waveform is similar to that shown in the illustration.
OK
|
|
|
4.
|
REGISTER ECU COMMUNICATION ID
|
(a) Reregister the ECU communication ID.
NEXT
|
|
|
5.
|
CHECK HYBRID CONTROL SYSTEM STARTS
|
(a) Using a registered door control transmitter assembly, turn the ignition switch to ON.
(b) Check that the hybrid control system can be started 5 seconds after the ignition switch was turned to ON (IG).
OK:
Hybrid control system starts normally.
OK |
|
END (COMMUNICATION ID REGISTRATION WAS DEFECTIVE)
|
6.
|
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - HYBRID VEHICLE CONTROL ECU)
|
(a) Disconnect the I67 transponder key ECU assembly connector.
(b) Disconnect the I3 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
|
I67-11 (EFIO) - I3-53 (IMI)
|
Always
|
Below 1 Ω
|
I67-11 (EFIO) or I3-53 (IMI) - Other terminals and body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
7.
|
INSPECT HYBRID VEHICLE CONTROL ECU (IMO TERMINAL VOLTAGE)
|
(a) Disconnect the I3 hybrid vehicle control ECU connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
|
Result
|
I3-39 (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
|
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 - HYBRID VEHICLE CONTROL ECU)
|
(a) Disconnect the I67 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
|
I67-10 (EFII) - I3-39 (IMO)
|
Always
|
Below 1 Ω
|
I67-10 (EFII) or I3-39 (IMO) - Other terminals and body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
9.
|
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - HYBRID VEHICLE CONTROL ECU)
|
(a) Disconnect the I67 transponder key ECU assembly connector.
(b) Disconnect the I3 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
|
I67-10 (EFII) - I3-39 (IMO)
|
Always
|
Below 1 Ω
|
I67-10 (EFII) or I3-39 (IMO) - Other terminals and body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
10.
|
INSPECT TRANSPONDER KEY ECU ASSEMBLY (TERMINAL EFII)
|
(a) Using an oscilloscope, check the waveform.
*a
|
Component with harness connected
(Transponder Key ECU Assembly)
|
*b
|
Waveform
|
*c
|
Approximately 160 ms.
|
*d
|
Approximately 270 ms.
|
OK
Tester Connection
|
Condition
|
Tool Setting
|
Specified Condition
|
I67-10 (EFII) - 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 (-) auxiliary battery terminal
|
2 V/DIV., 500 ms./DIV.
|
Pulse generation
(See waveform)
|
OK:
Waveform is similar to that shown in the illustration.
Result
|
Proceed to
|
OK
|
A
|
NG (Terminal EFII stuck low (2.4 V or less))
|
B
|
NG (Terminal EFII stuck high (12 V) or abnormal waveform)
|
C
|
A
|
|
|
11.
|
INSPECT TRANSPONDER KEY ECU ASSEMBLY (TERMINAL EFIO)
|
(a) Using an oscilloscope, check the waveform.
*a
|
Component with harness connected
(Transponder Key ECU Assembly)
|
*b
|
Waveform
|
*c
|
Approximately 160 ms.
|
*d
|
Approximately 270 ms.
|
OK
Tester Connection
|
Condition
|
Tool Setting
|
Specified Condition
|
I67-11 (EFIO) - 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 (-) auxiliary battery terminal
|
2 V/DIV., 500 ms./DIV.
|
Pulse generation
(See waveform)
|
OK:
Waveform is similar to that shown in the illustration.
OK
|
|
|
12.
|
REGISTER ECU COMMUNICATION ID
|
(a) Reregister the ECU communication ID.
NEXT
|
|
|
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.
OK |
|
END (COMMUNICATION ID REGISTRATION WAS DEFECTIVE)
|
NG |
|
REPLACE ECM
for M20A-FKS: Click here
for 2ZR-FAE: Click here
|
14.
|
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - ECM)
|
(a) Disconnect the I67 transponder key ECU assembly connector.
(b) Disconnect the A46*1 or A47*2 ECM connector.
-
*1: for 2ZR-FAE
-
*2: for M20A-FKS
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for 2ZR-FAE
Tester Connection
|
Condition
|
Specified Condition
|
I67-11 (EFIO) - A46-28 (IMI)
|
Always
|
Below 1 Ω
|
I67-11 (EFIO) or A46-28 (IMI) - Other terminals and body ground
|
Always
|
10 kΩ or higher
|
for M20A-FKS
Tester Connection
|
Condition
|
Specified Condition
|
I67-11 (EFIO) - A47-26 (IMI)
|
Always
|
Below 1 Ω
|
I67-11 (EFIO) or A47-26 (IMI) - Other terminals and body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
15.
|
INSPECT ECM (IMO TERMINAL VOLTAGE)
|
(a) Disconnect the A46*1 or A47*2 ECM connector.
-
*1: for 2ZR-FAE
-
*2: for M20A-FKS
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
for 2ZR-FAE
Tester Connection
|
Condition
|
Result
|
A46-45 (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
|
for M20A-FKS
Tester Connection
|
Condition
|
Result
|
A47-25 (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
|
Result
|
Proceed to
|
Terminal IMO stuck low (2.4 V or less)
|
A
|
Terminal IMO stuck high (12 V) or abnormal waveform
|
B
|
B |
|
REPLACE ECM
for M20A-FKS: Click here
for 2ZR-FAE: Click here
|
A
|
|
|
16.
|
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - ECM)
|
(a) Disconnect the I67 transponder key ECU assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for 2ZR-FAE
Tester Connection
|
Condition
|
Specified Condition
|
I67-10 (EFII) - A46-45 (IMO)
|
Always
|
Below 1 Ω
|
I67-10 (EFII) or A46-45 (IMO) - Other terminals and body ground
|
Always
|
10 kΩ or higher
|
for M20A-FKS
Tester Connection
|
Condition
|
Specified Condition
|
I67-10 (EFII) - A47-25 (IMO)
|
Always
|
Below 1 Ω
|
I67-10 (EFII) or A47-25 (IMO) - Other terminals and body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
17.
|
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - ECM)
|
(a) Disconnect the I67 transponder key ECU assembly connector.
(b) Disconnect the A46*1 or A47*2 ECM connector.
-
*1: for 2ZR-FAE
-
*2: for M20A-FKS
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for 2ZR-FAE
Tester Connection
|
Condition
|
Specified Condition
|
I67-10 (EFII) - A46-45 (IMO)
|
Always
|
Below 1 Ω
|
I67-10 (EFII) or A46-45 (IMO) - Other terminals and body ground
|
Always
|
10 kΩ or higher
|
for M20A-FKS
Tester Connection
|
Condition
|
Specified Condition
|
I67-10 (EFII) - A47-25 (IMO)
|
Always
|
Below 1 Ω
|
I67-10 (EFII) or A47-25 (IMO) - Other terminals and body ground
|
Always
|
10 kΩ or higher
|
OK |
|
REPLACE ECM
for M20A-FKS: Click here
for 2ZR-FAE: Click here
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
|