DESCRIPTION
This DTC is stored when one of the following occurs: 1) the ECM detects errors in its own communications with the transponder key ECU assembly; 2) the ECM detects errors in the communication lines; or 3) the ECU communication ID between the transponder key ECU assembly and ECM is different and an engine start is attempted.
Before troubleshooting for this DTC, make sure that no transponder key ECU assembly DTCs are present. If present, troubleshoot the transponder key ECU assembly DTCs first.
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
B2799 |
One of the following conditions is met:
|
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
CHECK DTC OUTPUT |
(a) Clear the DTCs (See page ).
(b) Recheck for DTCs (See page ).
OK:
DTC B2799 is not output.
OK | ![]() |
USE SIMULATION METHOD TO CHECK |
|
2. |
RE-REGISTER ECU COMMUNICATION ID |
(a) Re-register the ECU communication ID (See page
).
|
3. |
CHECK DTC OUTPUT |
(a) Clear the DTCs (See page ).
(b) Recheck for DTCs (See page ).
OK:
DTC B2799 is not output.
OK | ![]() |
END (ECU COMMUNICATION ID WAS NOT REGISTERED CORRECTLY) |
|
4. |
CHECK CONNECTION OF CONNECTOR |
(a) Turn the ignition switch off.
(b) Check that the connectors are properly connected to the ECM and transponder key ECU assembly.
OK:
Connectors are properly connected.
NG | ![]() |
CONNECT CONNECTORS PROPERLY |
|
5. |
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - ECM) |
(a) Disconnect the transponder key ECU assembly connector.
(b) Disconnect the ECM connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for 2GR-FE
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D22-12 (EFII) - A41-29 (IMO) |
Always |
Below 1 Ω |
D22-13 (EFIO) - A41-40 (IMI) |
Always |
Below 1 Ω |
D22-12 (EFII) - Body ground |
Always |
10 kΩ or higher |
D22-13 (EFIO) - Body ground |
Always |
10 kΩ or higher |
A41-29 (IMO) - Body ground |
Always |
10 kΩ or higher |
A41-40 (IMI) - Body ground |
Always |
10 kΩ or higher |
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D22-12 (EFII) - A49-10 (IMO) |
Always |
Below 1 Ω |
D22-13 (EFIO) - A49-11 (IMI) |
Always |
Below 1 Ω |
D22-12 (EFII) - Body ground |
Always |
10 kΩ or higher |
D22-13 (EFIO) - Body ground |
Always |
10 kΩ or higher |
A49-10 (IMO) - Body ground |
Always |
10 kΩ or higher |
A49-11 (IMI) - Body ground |
Always |
10 kΩ or higher |
*1 |
Front view of wire harness connector (to Transponder Key ECU Assembly) |
*2 |
Front view of wire harness connector (to ECM) |
*3 |
for 2GR-FE |
*4 |
for 1AR-FE |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
6. |
REPLACE ECM |
(a) Replace the ECM (See page for 2GR-FE,
for 1AR-FE).
|
7. |
REGISTER ECU COMMUNICATION ID |
(a) Register the ECU communication ID (See page
).
|
8. |
CHECK DTC OUTPUT |
(a) Clear the DTCs (See page ).
(b) Recheck for DTCs (See page ).
OK:
DTC B2799 is not output.
OK | ![]() |
END (ECM WAS DEFECTIVE) |
NG | ![]() |
REPLACE TRANSPONDER KEY ECU ASSEMBLY |
Installation
INSTALLATION
PROCEDURE
1. INSTALL POWER OUTLET SOCKET COVER NO.1
(a) Engage the 2 claws to install the power point socket cover.
2. INSTALL POWER POINT SOCKET ASSEMBLY
(a) Engage the 2 c ...
Differential System
Precaution
PRECAUTION
Before disassembly, clean the outside of the differential assembly and
remove any sand or mud to prevent it from entering the inside of the assembly
during disassembly and installation.
When removing an installed pa ...
Theft Deterrent System Presence Detection (B279C)
DESCRIPTION
If an ECM that is incompatible with the engine immobiliser system is installed,
the ECM stores this DTC.
DTC No.
DTC Detection Condition
Trouble Area
B279C
When an ECM that is incompa ...