Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Control Module Communication Bus "A" Off (U0073,U0155)
DESCRIPTION
These DTCs are stored when the clearance warning ECU assembly cannot receive and recognize several signals via the CAN communication line.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| U0073 | Control Module Communication Bus "A" Off | Control module communication bus off | CAN communication system |
| U0155 | Lost Communication with Instrument Panel Cluster (IPC) Control Module | Lost communication with the combination meter assembly | CAN communication system |
HINT:
When 2 or more DTCs starting with "U" are output simultaneously, inspect the connectors and wire harnesses of each ECU.
PROCEDURE
| 1. | CHECK DTC OUTPUT |
(a) Clear the DTCs
Click here .gif)
(b) Check for CAN communication system DTCs
Click here
| Result | Proceed to |
|---|---|
| CAN communication system DTCs are output | A |
| No CAN communication system DTCs are output | B |
| A |  | GO TO CAN COMMUNICATION SYSTEM |
| B | | USE SIMULATION METHOD TO CHECK |
Rear Sensor Communication Malfunction (C1AED)
DESCRIPTION This DTC is stored when there is an open or short circuit in the communication line between the rear sensors and the ECU, or when there is a malfunction in a rear sensor. DTC No. Dete ...
CAN Communication Failure (Message Registry) (U1000)
DESCRIPTION If DTC U1000 is stored frequently, duplicate the conditions that cause the problem symptoms and perform the inspection again even if the DTC is not output when rechecking for DTCs. DTC ...
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DESCRIPTION The occupant detection ECU receives signals from the acceleration sensor (airbag sensor assembly*1 or yaw rate sensor assembly*2) and skid control ECU via CAN communication. DTC No. Detection Item DTC Detection Condition Trouble Area B1798 Yaw Rate Sensor Module Malfunctio ...
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DESCRIPTION If the forward recognition camera detects an open or short to ground in the buzzer circuit, it will store DTC C1A4A14. DTC No. Detection Item DTC Detection Condition Trouble Area C1A4A14 Buzzer Circuit Short to Ground or Open The forward recognition camera detects an ope ...
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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