- Submersion of power management control ECU in water
- Power management control ECU
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJJI |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Start Function): B2277; Detecting Vehicle Submersion; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
DTC |
B2277 |
Detecting Vehicle Submersion |
DESCRIPTION
This DTC is stored when a malfunction in the water submersion detection circuit in the power management control ECU is detected.
HINT:
- When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) battery terminal, the power source mode changes to on (IG).
- When the battery cable is disconnected and reconnected, the power source returns to the mode it was in before the battery cable was disconnected.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
DTC Output Confirmation Operation |
|---|---|---|---|
|
B2277 |
The water submersion detection circuit in the power management control ECU detects water submersion (1-trip detection logic*). |
|
Wait 300 seconds after connecting the battery cable. |
- *: Only output while a malfunction is present and the engine switch is on (IG)
Vehicle Condition and Fail-safe Function when Malfunction Detected
|
Vehicle Condition when Malfunction Detected |
Fail-safe Function when Malfunction Detected |
|---|---|
|
The engine cannot be turned off and the engine cannot be started. |
The power source mode changes to on (IG) and starter relay activation is prohibited. |
CAUTION / NOTICE / HINT
NOTICE:
- When using the Techstream with the engine switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: Body Electrical / Smart Key / Trouble Codes.
-
The smart key system uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting (See page
![2016 MY Sienna [12/2015 - 08/2016]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING](/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.
Related Data List and Active Test Items
|
DTC |
Data List Item |
Active Test Item |
|---|---|---|
|
B2277 |
- |
- |
HINT:
Before proceeding with troubleshooting, check if there are any signs of water damage to the power management control ECU. If there are any signs of water damage, replace the power management control ECU and take measures against the cause of the water damage.
PROCEDURE
|
1. |
CHECK FOR WATER DAMAGE |
(a) Check for any signs of water damage to the power management control ECU, surrounding parts, wire harnesses and connectors.
Result
|
Result |
Proceed to |
|---|---|
|
No signs of water damage |
A |
|
Signs of water damage |
B |
| A |
|
REPLACE POWER MANAGEMENT CONTROL ECU (See page
|
| B |
|
TAKE MEASURES AGAINST CAUSE OF WATER DAMAGE AND REPLACE POWER MANAGEMENT CONTROL ECU |
|
|