Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Lost Communication With TCM (U0101,U0122,U0142,U0155,U0327,U1117)
DESCRIPTION
These DTCs are stored when a malfunction occurs in the CAN communication system.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| U0101 | Lost Communication With TCM | Communication malfunction detected between multiplex network door ECU and ECM |
|
| U0122 | Lost Communication with Vehicle Dynamics Control Module | Communication malfunction detected between multiplex network door ECU and brake actuator assembly (skid control ECU) |
|
| U0142 | Lost Communication with Body Control Module "B" | Communication malfunction detected between multiplex network door ECU and main body ECU (multiplex network body ECU) |
|
| U0155 | Lost Communication with Instrument Panel Cluster (IPC) Control Module | Communication malfunction detected between multiplex network door ECU and combination meter assembly |
|
| U0327 | Lost Communication with Vehicle Security Control Module | Communication malfunction detected between multiplex network door ECU and certification ECU (smart key ECU assembly) |
|
| U1117 | Lost Communication with Accessory Gateway | Communication malfunction detected between multiplex network door ECU and bus buffer ECU |
|
PROCEDURE
| 1. | CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Back Door / Trouble Codes.
(e) Clear the DTCs.
Body Electrical > Back Door > Clear DTCs(f) Check for DTCs.
Body Electrical > Back Door > Trouble CodesHINT:
If DTCs related to a malfunction in the CAN communication system are output, refer to "How to Proceed with Troubleshooting" for the CAN communication system.
Click here .gif)
OK:
DTC U0101, U0122, U0142, U0155, U0327 and U1117 is not output.
| OK | .gif) | USE SIMULATION METHOD TO CHECK |
| NG | | GO TO CAN COMMUNICATION SYSTEM |
Back Door Closer Switch Malfunction (B2251)
DESCRIPTION The multiplex network door ECU receives signals from the latch switch, position switch, pawl switch and back door courtesy switch, which are built into the back door lock assembly. Based o ...
Back Door Closer does not Operate
DESCRIPTION If the back door closer does not operate, one of the following may be the cause: 1) improper fit of the back door or a foreign object stuck in the back door, 2) a malfunction in the multip ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Lighting System (w/ Automatic Headlight Beam Level Control System): Automatic High Beam System (B124B)
DESCRIPTION The main body ECU (multiplex network body ECU) determines the status of the automatic high beam system based on the automatic high beam system signal from the forward recognition camera. DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from B124B Au ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Air Conditioning System: Blower Motor Circuit
DESCRIPTION The blower motor with fan sub-assembly is operated by signals from the air conditioning amplifier assembly. Blower motor speed signals are transmitted in accordance with changes in the duty ratio. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to t ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Lexus Display Audio system
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
0.0159