| 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. |
|
This diagnosis procedure is for when "Front Radar" is displayed on the CAN Bus Check screen and DTC U0235 is output by the driving support ECU assembly (GTS display: Pre-Crash 2).
CAUTION / NOTICE / HINT
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Before measuring the resistance of the CAN bus, turn the power 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 (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
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After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary 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 procedure listed in DTC Reproduction Method and confirm that the DTCs are not output again.
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DTC check procedure: Turn the power switch on (IG) and wait at least 3 seconds.
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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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Operating the power 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
- Click here
RECONFIRM DTC OUTPUT
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Reconfirm DTCs.
Tip: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
- AClick here
- B
GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC (Click here)
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- Click here
CHECK OPEN IN CAN BUS LINES (MILLIMETER WAVE RADAR SENSOR ASSEMBLY MAIN LINE)
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Disconnect the cable from the negative (-) auxiliary battery terminal.
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Disconnect the A77 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 A77-5 (CA1P) - A77-6 (CA1N) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Table 1. Text in Illustration *a Front view of wire harness connector
(to Millimeter Wave Radar Sensor Assembly)
- OKClick here
- NG
REPAIR OR REPLACE CAN MAIN LINE OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY)
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- Click here
CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY POWER SOURCE CIRCUIT
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Check the millimeter wave radar sensor assembly power source circuit (Click here).
- OK
REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY (Click here)
- NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
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