DESCRIPTION
These DTCs are stored when there is a CAN communication malfunction between the certification ECU (smart key ECU assembly), ECM, main body ECU (multiplex network body ECU) or combination meter assembly, and data from the option connector (bus buffer ECU) cannot be received.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
---|---|---|---|---|
U0100 | Lost Communication with ECM / PCM | CAN communication malfunction between certification ECU (smart key ECU assembly) and ECM (1-trip detection logic*) | ECM |
|
U0140 | Lost Communication with Main Body ECU | CAN communication malfunction between certification ECU (smart key ECU assembly) and main body ECU (multiplex network body ECU) (1-trip detection logic*) | Main body ECU (multiplex network body ECU) |
|
U0142 | Lost Communication with Main Body ECU | CAN communication malfunction between certification ECU (smart key ECU assembly) and main body ECU (multiplex network body ECU) (1-trip detection logic*) | Main body ECU (multiplex network body ECU) |
|
U0155 | Lost Communication with Combination Meter | CAN communication malfunction between certification ECU (smart key ECU assembly) and combination meter assembly (1-trip detection logic*) | Combination meter assembly |
|
U1117 | Lost Communication with Accessory Gateway | Data from the option connector (bus buffer ECU) cannot be received |
|
|
DTC Code | Vehicle Condition when Malfunction Detected | Fail-safe Function when Malfunction Detected |
---|---|---|
U0100 | There is no effect on vehicle behavior. | If the following conditions are met, it can be determined that the malfunction is not in the direct line (NE) but in the CAN communication system.
If the following conditions are met, it can be determined that there is a malfunction in both the CAN communication system and the direct line (NE).
|
U0140 U0142 |
| - |
U0155 | The warning (meter buzzer) does not sound and no warning messages displayed on the multi-information display. | - |
U1117 | The engine cannot be started using the wireless remote control function. | - |
DTC No. | Data List and Active Test |
---|---|
U0100 U0140 U0142 U0155 U1117 | - |
CAUTION / NOTICE / HINT
NOTICE:
HINT:
When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the state it was in before the cable was disconnected.
PROCEDURE
1. | CHECK FOR DTC |
(a) Check for DTCs and note any DTCs that are output.
Click here
NEXT | ![]() | GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Sfi System: Fuel Rail Pressure Sensor "A" Signal Stuck in Range (P01902A,P019064)
DESCRIPTION Refer to DTC P019011. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note P01902A Fuel Rail Pressure Sensor "A" Signal Stuck in Range When target high pressure side fuel pressure changes, the change in fuel pressure sensor value ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Steering Lock System: Terminals Of Ecu
TERMINALS OF ECU TERMINAL INSPECTION *a Component without harness connected (Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly)) - - (a) Measure the voltage and resistance according to the value(s) in the table below. Terminal No. (Symbol) Input/Output Wiring Co ...