- Wire harness or connector
- Transponder key ECU assembly
- ECM
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJLA |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - 08/2016] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): B279A; Theft Deterrent System Communication Line High Fixation; 2016 MY Sienna [12/2015 - 08/2016] | ||
|
DTC |
B279A |
Theft Deterrent System Communication Line High Fixation |
DESCRIPTION
When the communication line (IMI - EFIO) between the ECM and transponder key ECU assembly is stuck on HI output, the ECM stores this DTC.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B279A |
The communication line (IMI - EFIO) between the ECM and transponder key ECU assembly is stuck on HI output. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
When replacing the 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)
).
-
When replacing the ECM, refer to the INITIALIZATION (See page
).
- 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) Check for DTCs (See page
).
HINT:
Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.
OK:
DTC B279A is not output.
| OK |
|
|
|
3. |
CHECK CONNECTION OF CONNECTOR |
(a) Check that the connectors are properly connected to the ECM and transponder key ECU assembly.
OK:
Connectors are properly connected.
| NG |
|
CONNECT CONNECTORS PROPERLY |
|
|
4. |
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - ECM) |
(a) Disconnect the D151 transponder key ECU assembly connector.
(b) Disconnect the A39 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D151-13 (EFIO) - A39-40 (IMI) |
Always |
Below 1 Ω |
|
D151-13 (EFIO) or A39-40 (IMI) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
REPLACE TRANSPONDER KEY ECU ASSEMBLY |
(a) Replace the transponder key ECU assembly with a new one (See page
).
|
|
6. |
REGISTER KEY |
(a) Register the key (See page
).
|
|
7. |
REGISTER ECU COMMUNICATION ID |
(a) Register the ECU communication ID (See page
).
|
|
8. |
CHECK WHETHER ENGINE STARTS |
(a) Check that the engine starts with the key.
OK:
Engine starts normally.
| OK |
|
END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE) |
| NG |
|
|
|