Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Control Module Communication Bus "A" Off (U0073,U0100,U0124,U0126,U0129,U0140,U0155,U0164)
DESCRIPTION
These DTCs are stored if there is a malfunction in the CAN communication system connected to the clearance warning ECU 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 |
|---|---|---|---|
| U0073 | Control Module Communication Bus "A" Off | Control module communication bus off | CAN communication system |
| U0100 | Lost Communication with ECM / PCM "A" | Lost communication with ECM | CAN communication system |
| U0124 | Lost Communication with Lateral Acceleration Sensor Module | Lost communication with airbag ECU assembly | 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 |
| U0155 | Lost Communication With Instrument Panel Cluster (IPC) Control Module | Lost communication with meter circuit plate | CAN communication system |
| U0164 | Lost Communication with HVAC Control Module | Lost communication with air conditioning amplifier assembly | CAN communication system |
PROCEDURE
| 1. | CHECK DTC OUTPUT |
(a) Using the Techstream, check for DTCs according to the prompts on the screen.
Click here .gif)
HINT:
After turning the engine switch from off to on (IG), wait 10 seconds or more before checking for DTCs.
Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes(b) Clear the DTCs according to the screen on the Techstream.
Click here
(c) Recheck for DTCs.
Click here
OK:
No DTCs are output.
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 caused the problem symptoms and perform the inspection again, even though DTCs were not output when rechecking for DTCs.
| OK |  | GO TO CAN COMMUNICATION SYSTEM |
| NG | | USE SIMULATION METHOD TO CHECK |
Rr Sensor Initialization Incomplete (C1AF4)
DESCRIPTION When it is judged that the rear sensors have not been initialized, the clearance warning ECU assembly stores DTC C1AF4. DTC No. Detection Item DTC Detection Condition Trouble Area ...
Lost Communication with Blind Spot Monitor Slave Module (U0232,U0233)
DESCRIPTION This DTC is stored when the blind spot monitor sensor LH judges that there is a communication problem with the blind spot monitor sensor RH. DTC No. Detection Item DTC Detection Con ...
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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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