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 |
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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