Lexus NX: Lost Communication with Cruise Control Module Missing Message (U010487)
DESCRIPTION
The millimeter wave radar sensor assembly communicates with the forward recognition camera via CAN communication.
If a communication error is detected between the forward recognition camera and millimeter wave radar sensor assembly, the millimeter wave radar sensor assembly stores this DTC.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| U010487 | Lost Communication with Cruise Control Module Missing Message |
|
|
HINT:
If the DTCs are output simultaneously, the inspection area can be narrowed down.
| Pattern | DTC output part name (Display on Techstream) | Suspected Area (Malfunction Status) | |
|---|---|---|---|
| Millimeter Wave Radar Sensor Assembly (Front Radar Sensor) | Forward Recognition Camera (Pre-Collision System) | ||
| U010487 | U023587 | ||
|
○: DTC is output
-: DTC is not output | |||
| Pattern 1 | ○ | ○ | Local bus (Open or short) |
| Forward recognition camera (Internal malfunction) | |||
| Millimeter wave radar sensor assembly (Internal malfunction) | |||
| Pattern 2 | ○ | - | Millimeter wave radar sensor assembly (Internal malfunction) |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
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.
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- When replacing the millimeter wave radar sensor assembly, always replace it with a new one. If a millimeter wave radar sensor assembly which was installed to another vehicle is used, the information stored in the millimeter wave radar sensor assembly will not match the information from the vehicle and a DTC may be stored.
-
When the millimeter wave radar sensor assembly has been replaced with a new one, it is necessary to perform millimeter wave radar sensor assembly adjustment and front radar acceleration sensor calibration, and to clear the vehicle control history.
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- When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle and a DTC may be stored.
-
If the forward recognition camera has been replaced with a new one, forward recognition camera adjustment must be performed.
HINT:
Forward recognition camera adjustment can be performed by using either One Time Recognition or Sequential Recognition.
One Time Recognition:
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Sequential Recognition:
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PROCEDURE
| 1. | CHECK FOR DTC |
(a) Read each DTC and check the diagnosis pattern using the table below.
for Front Radar Sensor: Click here
for Pre-Collision System: Click here
| Pattern | Display on Techstream / Output DTC | |
|---|---|---|
| Millimeter Wave Radar Sensor Assembly (Front Radar Sensor) | Forward Recognition Camera (Pre-Collision System) | |
| Pattern 1 | U010487 | U023587 |
| Pattern 2 | U010487 | - |
| Result | Proceed to |
|---|---|
| Pattern 1 | A |
| Pattern 2 | B |
| B | .gif) | REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
|
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| 2. | CHECK CAN MAIN WIRE (MILLIMETER WAVE RADAR SENSOR ASSEMBLY CAN MAIN WIRE) |
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the B10 millimeter wave radar sensor assembly connector.
| *a | Front view of wire harness connector (to Millimeter Wave Radar Sensor Assembly) | *b | DLC3 |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| B10-5 (CA1P) - B10-6 (CA1N) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω |
| B10-5 (CA1P) - I182-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher |
| B10-6 (CA1N) - I182-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher |
| B10-5 (CA1P) - I182-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher |
| B10-6 (CA1N) - I182-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher |
| NG | | GO TO STEP 4 |
|
| 3. | CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
(a) Replace the millimeter wave radar sensor assembly.
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(b) Clear the DTCs.
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(c) Make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the system cannot detect the malfunction.
(d) Recheck for DTCs and check that no DTCs are output.
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OK:
DTC U010487 is not output.
| OK | | END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE) |
| NG | | REPLACE FORWARD RECOGNITION CAMERA |
| 4. | CHECK CAN MAIN WIRE (FORWARD RECOGNITION CAMERA CAN MAIN WIRE) |
(a) Reconnect the B10 millimeter wave radar sensor assembly connector.
(b) Disconnect the T18 forward recognition camera connector.
| *a | Front view of wire harness connector (to Forward Recognition Camera) | *b | DLC3 |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| T18-6 (CANH) - T18-12 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω |
| T18-6 (CANH) - I182-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher |
| T18-12 (CANL) - I182-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher |
| T18-6 (CANH) - I182-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher |
| T18-12 (CANL) - I182-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher |
| OK | | GO TO STEP 3 |
| NG | | REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR |
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