Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Invalid Data Received from ECM/PCM "A" Invalid Serial Data Received (U040181)
DESCRIPTION
If the ECM cannot recognize the forward recognition camera. DTC U040181 is stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | DTC Output from |
|---|---|---|---|---|---|
| U040181 | Invalid Data Received from ECM/PCM "A" Invalid Serial Data Received | Approximately 17 seconds or more after the engine switch is turned on (IG), the ECM cannot recognize the forward recognition camera for approximately 2 seconds or more. | ECM | Does not come on | Radar Cruise2 |
CAUTION / NOTICE / HINT
NOTICE:
Before replacing the ECM, refer to Registration.
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PROCEDURE
| 1. | CHECK FOR DTCs |
(a) Clear the DTCs.
Powertrain > Radar Cruise2 > Clear DTCs(b) Make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the system cannot detect the malfunction.
(c) Check for DTCs.
Powertrain > Radar Cruise2 > Trouble Codes| Result | Proceed to |
|---|---|
| DTC U040181 is not output | A |
| DTC U040181 is output | B |
| A | .gif) | USE SIMULATION METHOD TO CHECK |
| B | | REPLACE ECM |
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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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