DESCRIPTION
The 4WD ECU assembly stores this DTC when a communication malfunction is detected.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
---|---|---|---|
U0073 | Control Module Communication Bus Off |
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|
CAUTION / NOTICE / HINT
NOTICE:
When the 4WD ECU assembly is replaced with a known good one from another vehicle, it is necessary to perform calibration.
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PROCEDURE
1. | CHECK CAN COMMUNICATION SYSTEM |
(a) Check for malfunctions in the CAN communication system.
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Result | Proceed to |
---|---|
CAN communication DTCs are not output | A |
CAN communication DTCs are output | B |
B | ![]() | GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
|
2. | RECONFIRM DTC |
(a) Clear the DTCs.
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(b) Turn the engine switch off.
(c) Check if the same DTC is output.
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Result | Proceed to |
---|---|
DTC U0073 is output | A |
DTC U0073 is not output | B |
A | ![]() | REPLACE 4WD ECU ASSEMBLY |
B | ![]() | CHECK FOR INTERMITTENT PROBLEMS |
Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual > Front Radar Sensor System: Terminals Of Ecu
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Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual > Park / Neutral Position Switch: On-vehicle Inspection
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