DESCRIPTION
This DTC is stored when a malfunction in the water submersion detection circuit inside the certification ECU (smart key ECU assembly) is detected.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
---|---|---|---|---|
B2277 | Detecting Vehicle Submersion | Water submersion detected by the water submersion detection circuit inside the certification ECU (smart key ECU assembly). (1-trip detection logic*) | Certification ECU (Smart key ECU assembly) |
|
Vehicle Condition when Malfunction Detected | Fail-safe Function when Malfunction Detected |
---|---|
The engine switch cannot be turned off and the engine cannot be started. | - |
DTC No. | Data List and Active Test |
---|---|
B2277 | - |
CAUTION / NOTICE / HINT
NOTICE:
Click here
Click here
HINT:
PROCEDURE
1. | CHECK WATER INTRUSION |
(a) Check that the certification ECU (smart key ECU assembly), its ground area and wire harnesses have no signs of water intrusion.
Result | Proceed to |
---|---|
No sign of water intrusion found | A |
Signs of water intrusion found | B |
A | REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
B | TAKE MEASURES FOR WATER INTRUSION AND REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Ecm: Removal
REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during ECM removal/installation are shown below. Necessary Procedure After Parts Removed/Installed/Replaced ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Heating / Air Conditioning: Relay
On-vehicle InspectionON-VEHICLE INSPECTION PROCEDURE 1. INSPECT PTC HEATER RELAY (a) Measure the resistance according to the value(s) in the table below. *a Component without harness connected (PTC HTR NO. 1) *b Component without harness connected (PTC HTR NO. 2) *c Component without ...