- Hybrid control system starting: Hybrid control system cannot be started next time
- Hybrid control system stopped: Hybrid control system cannot be started
| Last Modified: 05-08-2025 | 6.11:8.1.0 | Doc ID: RM100000001G212 |
| Model Year Start: 2019 | Model: RAV4 HV | Prod Date Range: [11/2018 - ] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): B2790; ID BOX EEPROM Malfunction; 2019 - 2025 MY RAV4 HV [11/2018 - ] | ||
|
DTC |
B2790 |
ID BOX EEPROM Malfunction |
DESCRIPTION
When an internal malfunction occurs in the ID code box (immobiliser code ECU), the certification ECU (smart key ECU assembly) stores this DTC.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Note |
|---|---|---|---|---|
|
B2790 |
ID BOX EEPROM Malfunction |
An internal malfunction occurs in the ID code box (immobiliser code ECU) (EEPROM access malfunction) (1 trip detection logic*). |
|
DTC output confirmation operation:
|
- *: Only output while a malfunction is present.
Vehicle Condition and Fail-safe Operation when Malfunction Detected
|
Vehicle Condition when Malfunction Detected |
Fail-safe Operation when Malfunction Detected |
|---|---|
|
|
- |
Related Data List and Active Test
|
DTC No. |
Data List and Active Test |
|---|---|
|
B2790 |
- |
CAUTION / NOTICE / HINT
NOTICE:
- When using the Techstream with the power switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
-
The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly.
Click here
![2019 MY RAV4 HV [11/2018 - 02/2019]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): HOW TO PROCEED WITH TROUBLESHOOTING](/t3Portal/stylegraphics/info.gif)
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Before replacing the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU), refer to the Registration.
Click here
- After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
PROCEDURE
|
1. |
REPLACE ID CODE BOX (IMMOBILISER CODE ECU) |
(a) Replace the ID code box (immobiliser code ECU) with a new one.
Click here
HINT:
Refer to Registration.
Click here
|
|
2. |
CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Smart Key / Clear DTCs.
(e) Clear the DTCs.
Body Electrical > Smart Key > Clear DTCs
|
|
3. |
REGISTER RECOGNITION CODES |
(a) Register the recognition codes to the ECUs.
HINT:
Refer to Registration.
Click here
|
|
4. |
REGISTER ECU COMMUNICATION ID (ID CODE BOX (IMMOBILISER CODE ECU) - HYBRID VEHICLE CONTROL ECU ASSEMBLY) |
(a) Register the ECU communication ID codes.
HINT:
Refer to Registration.
Click here
|
|
5. |
CHECK FOR DTC |
(a) Enter the following menus: Body Electrical / Smart Key / Trouble Codes.
(b) Check for DTCs.
Body Electrical > Smart Key > Trouble Codes
HINT:
Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.
|
Result |
Proceed to |
|---|---|
|
DTC B2790 is not output. |
A |
|
DTC B2790 is output. |
B |
| A |
|
END (ID CODE BOX (IMMOBILISER CODE ECU) WAS DEFECTIVE) |
| B |
|
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
|
|
|