Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Lost Communication with ECM / PCM "A" (U0100,U0126,U0129,U0140,U0163,U0233,U1110)
DESCRIPTION
These DTCs are stored if there is a malfunction in the CAN communication system connected to the rear television camera assembly.
HINT:
If CAN communication system DTCs are stored, they may also be stored in other systems.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| U0100 | Lost Communication with ECM / PCM "A" | Lost Communication with ECM | CAN communication system |
| U0126 | Lost Communication with Steering Angle Sensor Module | Lost communication with steering sensor | CAN communication system |
| U0129 | Lost Communication with Brake System Control Module | Lost communication with skid control ECU | CAN communication system |
| U0140 | Lost Communication with Body Control Module | Lost communication with main body ECU (multiplex network body ECU) | CAN communication system |
| U0163 | Lost Communication with Navigation Control Module | Lost communication with radio receiver assembly | CAN communication system |
| U0233 | Lost Communication with Blind Spot Monitor Master Module | Lost communication with blind spot monitor sensor LH | CAN communication system |
| U1110 | Lost Communication with Intuitive Parking Assist Module | Lost communication with clearance warning ECU assembly | CAN communication system |
PROCEDURE
| 1. | CHECK DTC OUTPUT |
(a) Clear the DTCs.
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(b) Recheck for DTCs and check that no DTCs are output.
Click here
HINT:
- If CAN communication system DTCs are stored, they may also be stored in other systems.
- If the CAN communication system has been inspected and repaired in other systems, the DTCs will not be output when rechecking for DTCs.
-
If these DTCs are output frequently, duplicate the conditions that cause the problem symptoms and perform the inspection again, even if the DTCs were not output when rechecking for DTCs.
Click here
| Result | Proceed to |
|---|---|
| DTCs are output | A |
| No DTCs are output | B |
| A |  | GO TO CAN COMMUNICATION SYSTEM |
| B | | USE SIMULATION METHOD TO CHECK |
Steering Angle Initialization Incomplete (C1694)
DESCRIPTION This DTC is stored when the rear television camera assembly judges that the maximum steering angle has not been memorized (steering angle setting is incomplete). DTC No. Detection Ite ...
CAN Communication Failure (Message Registry) (U1000)
DESCRIPTION This DTC is stored when the rear television camera assembly judges that it has an internal CAN malfunction. DTC No. Detection Item DTC Detection Condition Trouble Area U1000 ...
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Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Can Communication System: Check Bus 4 Line for Short to GND
DESCRIPTION There may be a short circuit between one of the CAN bus lines and GND when there is no resistance between terminal 22 (CA2H) of the network gateway ECU and terminal 4 (CG) of the DLC3, or terminal 7 (CA2L) of the network gateway ECU and terminal 4 (CG) of the DLC3. Symptom Trouble A ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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