DESCRIPTION
This DTC is stored when one of the following occurs: 1) the ECM detects an error in its own communication with the certification ECU (smart key ECU assembly); 2) the ECM detects an error in the communication lines; or 3) the ECU communication ID between the certification ECU (smart key ECU assembly) and ECM is different when an engine start is attempted.
HINT:
Before troubleshooting this DTC, make sure that no certification ECU (smart key ECU assembly) DTCs are present. If present, troubleshoot the certification ECU (smart 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:
If the certification ECU (smart key ECU assembly) is replaced, register the key
(See page ).
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 INCORRECT) |
|
4. |
CHECK CONNECTOR CONNECTION CONDITION |
(a) Turn the engine switch off.
(b) Check that the connectors are properly connected to the ECM and certification ECU (smart key ECU assembly).
OK:
Connectors are properly connected.
NG | ![]() |
CONNECT CONNECTORS PROPERLY |
|
5. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - ECM) |
(a) Disconnect the certification ECU (smart 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 |
---|---|---|
D25-34 (EFII) - A41-29 (IMO) |
Always |
Below 1 Ω |
D25-35 (EFIO) - A41-40 (IMI) |
Always |
Below 1 Ω |
D25-34 (EFII) - Body ground |
Always |
10 kΩ or higher |
D25-35 (EFIO) - Body ground |
Always |
10 kΩ or higher |
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D25-34 (EFII) - A49-10 (IMO) |
Always |
Below 1 Ω |
D25-35 (EFIO) - A49-11 (IMI) |
Always |
Below 1 Ω |
D25-34 (EFII) - Body ground |
Always |
10 kΩ or higher |
D25-35 (EFIO) - Body ground |
Always |
10 kΩ or higher |
*1 |
Front view of wire harness connector (to Certification ECU (Smart 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. |
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 CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
Installation
INSTALLATION
PROCEDURE
1. INSTALL POWER BACK DOOR UNIT ASSEMBLY
(a) Install the power back door unit with the 4 bolts.
Torque:
13 N·m {133 kgf·cm, 10 ft·lbf}
(b) Connect the connector.
2. ...
Power Source Mode does not Change to ON (ACC)
DESCRIPTION
When the engine switch is pushed with the electrical key in the cabin, the power
management control ECU receives signals to change the power source mode.
HINT:
To allow use of the Techstream to inspect the push-button start function when
the ...
ABS Control System Malfunction (43)
DESCRIPTION
This DTC is output when the VSC system detects a malfunction in the ABS control
system.
DTC Code
DTC Detection Condition
Trouble Area
43
Malfunction in the ABS control system.
...