- Key
- Wire harness or connector
- Transponder key coil
- Transponder key ECU assembly
| Last Modified: 08-28-2024 | 6.11:8.1.0 | Doc ID: RM100000000VJL1 |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): B2794,B2797,B2798; Unmatched Encryption Code; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
DTC |
B2794 |
Unmatched Encryption Code |
|
DTC |
B2797 |
Communication Malfunction No. 1 |
|
DTC |
B2798 |
Communication Malfunction No. 2 |
DESCRIPTION
- DTC B2794 is stored when a key with an incomplete key code is inserted into the ignition key cylinder.
- DTC B2797 is stored when a key with a Bcc malfunction is inserted into the ignition key cylinder.
- DTC B2798 is stored when a key is inserted into the ignition key cylinder but a communication error occurs between the key and transponder key ECU assembly.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B2794 |
A key with an incomplete key code is inserted into the ignition key cylinder. |
|
|
B2797 |
A key with a Bcc malfunction is inserted into the ignition key cylinder. |
|
|
B2798 |
Key code identification cannot be completed within the specified time. |
CAUTION / NOTICE / HINT
NOTICE:
-
When replacing the key and transponder key ECU assembly, refer to the Registration (See page
![2016 - 2020 MY Sienna [12/2015 - ]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): REGISTRATION](/t3Portal/stylegraphics/info.gif)
).
- After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.
PROCEDURE
|
1. |
CLEAR DTC |
(a) Clear the DTCs (See page
).
|
|
2. |
CHECK FOR DTC |
(a) Insert and remove each registered key one at a time, and check for DTCs each time (See page
).
HINT:
- Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.
- If DTC is stored, clear the DTCs before checking the next key.
OK:
DTC B2794, B2797 and B2798 is not output.
Result
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (all keys) |
B |
|
NG (any key) |
C |
| A |
|
USE SIMULATION METHOD TO CHECK (See page
|
| C |
|
REPLACE KEY THAT CANNOT START ENGINE |
|
|
3. |
CHECK CONNECTION OF CONNECTOR |
(a) Check that the connectors are properly connected to the transponder key coil.
(b) Check that the engine starts with the key.
OK:
Engine starts.
| OK |
|
END (CONNECTOR WAS NOT CONNECTED PROPERLY) |
|
|
4. |
REPLACE TRANSPONDER KEY COIL |
(a) Clear the DTC (See page
).
(b) Replace the transponder key coil (See page
).
(c) Check that the engine starts with the key.
OK:
Engine starts.
| OK |
|
END (TRANSPONDER KEY COIL WAS DEFECTIVE) |
| NG |
|
|
|