CAN COMMUNICATION SYSTEM(w/ Central Gateway ECU), Diagnostic DTC:U0235
| DTC Code | DTC Name |
|---|---|
| U0235 | Lost Communication with Cruise Control Front Distance Range Sensor |
DESCRIPTION
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| U0235 | No communication from the millimeter wave radar sensor assembly continues. |
|
Tech Tips
This diagnosis procedure is for when DTC U0235 is output by the driving support ECU assembly (GTS display: Pre-Crash 2).
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Note
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Before measuring the resistance of the CAN bus, turn the engine switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
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After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work Click here.
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Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output Click here.
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After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.
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DTC check procedure: Drive the vehicle at a speed of 36 km/h (22 mph) or more for 2 seconds or more.
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After the repair, perform CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed Click here.
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Inspect the fuses for circuits related to this system before performing the following procedure.
Tech Tips
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Operating the engine switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
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Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
PROCEDURE
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RECONFIRM DTC OUTPUT
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Reconfirm DTCs.
Tech Tips
If DTC U1002 is output from Pre-Crash 2 of the driving support ECU assembly, this indicates a sub bus 13 malfunction. Troubleshoot for DTC U1002 and check for malfunctions in sub bus 13.
Result Result Proceed to U1002 is not output from driving support ECU assembly
(GTS display: Pre-Crash 2)
A U1002 is output from driving support ECU assembly
(GTS display: Pre-Crash 2)
B
B 
GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC Click here
A 
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CHECK FOR OPEN IN SUB BUS 13 LINES (MILLIMETER WAVE RADAR SENSOR ASSEMBLY MAIN LINE)
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Disconnect the cable from the negative (-) battery terminal.
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Text in Illustration *a Front view of wire harness connector
(to Millimeter Wave Radar Sensor Assembly)
Disconnect the A74 millimeter wave radar sensor assembly connector.
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Measure the resistance according to the value(s) in the table below.
Standard Resistance Tester Connection Condition Specified Condition A74-5 (CA1P) - A74-6 (CA1N) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
NG
REPAIR OR REPLACE CAN MAIN LINE OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY)
OK
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CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY POWER SOURCE CIRCUIT
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Check the millimeter wave radar sensor assembly power source circuit.
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for 2GR-FE or 2AR-FE Click here
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for 6AR-FSE Click here
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OK
REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY Click here
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
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