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 - ECM 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 no engine immobiliser DTCs are output. If output, troubleshoot the engine immobiliser DTCs first.
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
B2799 |
One of the following conditions is met:
|
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
When the transponder key ECU assembly and/or ECM is replaced, refer to Registration
(See page ).
PROCEDURE
1. |
CLEAR DTC |
(a) Clear the DTCs (See page ).
|
2. |
CHECK FOR DTC |
(a) Check for DTCs (See page ).
OK:
DTC B2799 is not output.
OK | ![]() |
USE SIMULATION METHOD TO CHECK |
|
3. |
REREGISTER ECU - ECM COMMUNICATION ID |
(a) Reregister the ECU - ECM communication ID (See page
).
|
4. |
CLEAR DTC |
(a) Clear the DTCs (See page ).
|
5. |
CHECK FOR DTC |
(a) Check for DTCs (See page ).
OK:
DTC B2799 is not output.
OK | ![]() |
END |
|
6. |
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 CONNECTOR CORRECTLY |
|
7. |
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - ECM) |
(a) Disconnect the F34 ECU connector.
(b) Disconnect the F50 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F34-13 (EFIO) - F50-14 (IMI) |
Always |
Below 1 Ω |
F34-12 (EFII) - F50-20 (IMO) |
||
F34-13 (EFIO) or F50-14 (IMI) - Body ground |
Always |
10 kΩ or higher |
F34-12 (EFII) or F50-20 (IMO) - Body ground |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
8. |
REPLACE TRANSPONDER KEY ECU ASSEMBLY |
(a) Temporarily replace the transponder key ECU assembly with a new one (See
page ).
|
9. |
REREGISTER ECU - ECM COMMUNICATION ID |
(a) Reregister the ECU - ECM communication ID (See page
).
|
10. |
CLEAR DTC |
(a) Clear the DTCs (See page ).
|
11. |
CHECK FOR DTC |
(a) Check for DTCs (See page ).
OK:
DTC B2799 is not output.
OK | ![]() |
END (TRANSPONDER KEY ECU IS DEFECTIVE) |
NG | ![]() |
REPLACE ECM |
Reassembly
REASSEMBLY
PROCEDURE
1. INSTALL TRANSFER DRIVE SPROCKET SUB-ASSEMBLY
Text in Illustration
*1
Shifting Key
*2
Drive Sprocket
*3
Key Spring
*4
Clutch S ...
Generator Signal Circuit
DESCRIPTION
When the engine is started, the generator assembly turns on and a voltage pulse
signal is generated.
This signal is used by the air conditioning amplifier assembly.
The signal expressing the amount of output from the generator assembly is one ...