DESCRIPTION
DTC Code |
DTC Detection Condition |
Trouble Area |
DTC Output Confirmation Operation |
---|---|---|---|
B2793 |
A transponder chip malfunction (1 trip detection logic*). |
|
Insert the key into the ignition key cylinder, turn the ignition switch from off to ON and wait at least 20 seconds. |
B2794 |
A key with an incomplete key ID code is used to turn the ignition switch to ON (1 trip detection logic*). |
||
B2797 |
A key with a BCC malfunction is used to turn the ignition switch to ON (1 trip detection logic*). |
||
B2798 |
Key ID code identification cannot be completed within the specified time (1 trip detection logic*). |
Vehicle Condition when Malfunction Detected |
Fail-safe Operation when Malfunction Detected |
---|---|
Engine cannot be started |
- |
DTC No. |
Data List and Active Test |
---|---|
B2793 |
- |
B2794 |
- |
B2797 |
- |
B2798 |
- |
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
CLEAR DTC |
(a) Clear the DTCs (See page ).
|
2. |
CHECK DTC OUTPUT |
(a) Perform "DTC Output Confirmation Operation" procedure.
(b) Check for DTCs (See page ).
HINT:
If DTC B2793, B2794, B2797, or B2798 is stored, clear the DTCs before checking the next key.
OK:
DTC B2793, B2974, B2797 and B2798 are not output.
Result
Result |
Proceed to |
---|---|
DTCs are output for all of the keys |
A |
DTCs are output for any of the keys |
B |
DTCs are not output |
C |
B | ![]() |
REPLACE KEY THAT DTC IS OUTPUT |
C | ![]() |
USE SIMULATION METHOD TO CHECK |
|
3. |
CHECK CONNECTION OF CONNECTOR |
(a) Check that the connector is properly connected to the transponder key coil.
(b) Check that the engine starts with the key.
OK:
Engine starts normally.
OK | ![]() |
END (CONNECTOR WAS NOT CONNECTED PROPERLY) |
|
4. |
REPLACE TRANSPONDER KEY COIL |
(a) Clear the DTCs (See page ).
(b) Replace the transponder key coil (See page
).
(c) Check that the engine starts with the key (See page
).
OK:
Engine starts normally.
OK | ![]() |
END (TRANSPONDER KEY COIL WAS DEFECTIVE) |
NG | ![]() |
REPLACE TRANSPONDER KEY ECU ASSEMBLY |
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
The ECM of this system is connected to the CAN communication system.
Therefore, before starting troubleshooting, make sure to check that there
is no trouble in the CAN and multiplex communication system.
*: Use the Techstream.
PROCEDURE
...
Data List / Active Test
DATA LIST / ACTIVE TEST
1. READ DATA LIST
HINT:
Using the Techstream to read the Data List allows the values or states of switches,
sensors, actuators and other items to be read without removing any parts. This non-intrusive
inspection can be very useful because intermittent conditions or sig ...
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
When troubleshooting a vehicle with the diagnosis system, the only difference
from the usual troubleshooting procedure is connecting the Techstream to the vehicle
and reading various data output from the vehicle's skid control ECU (brake actuator
assembly) ...