Lexus NX: Master Module Horizontal Axis Misalignment (C1AC1)
DESCRIPTION
This DTC is stored when the angle of the blind spot monitor sensor LH deviates more than the allowable range from the horizontal axis.
HINT:
If a drum tester such as a speedometer tester, brake/speedometer combination tester or chassis dynamometer is used with the blind spot monitor main switch (combination switch assembly) on, the blind spot monitor system may store this DTC by mistake.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
|---|---|---|---|---|
| C1AC1 | Master Module Horizontal Axis Misalignment | When the blind spot monitor sensor deviates 5 degrees or more from the horizontal axis when the system is activated. | Blind spot monitor sensor LH | - |
CAUTION / NOTICE / HINT
NOTICE:
- When checking for DTCs, make sure that the blind spot monitor main switch (combination switch assembly) is on.
-
If the bumper is damaged or the vehicle has a history of body repair, there is a possibility that the installation area of the blind spot monitor sensor may be deformed and the blind spot monitor sensor system may not operate correctly, so visually inspect the blind spot monitor sensor installation area (frame, stud bolt) to make sure it is not dented or bent.
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If the visual inspection finds a problem, check the installation condition of the blind spot monitor sensor, and adjust the installation position of the blind spot monitor sensor as necessary.
PROCEDURE
| 1. | CHECK VEHICLE CONDITION |
(a) Check the condition of the rear bumper around the blind spot monitor sensors.
HINT:
When mud, snow, ice, a sticker, etc. is covering the sensor or its surrounding area on the rear bumper, the blind spot monitor sensor may store this DTC by mistake.
| Result | Proceed to |
|---|---|
| A sticker, mud, snow, ice, etc. is covering the sensor or surrounding area on the rear bumper. | A |
| There are scratches or dents on the rear bumper around the sensors. | B |
| No abnormalities. |
| B | .gif) | GO TO STEP 3 |
|
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| 2. | PERFORM BEAM AXIS CONFIRMATION |
(a) Install the rear bumper.
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(b) Perform Blind Spot Monitor Beam Axis Confirmation using the Techstream.
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| Tester Display |
|---|
| BSM Master Beam Axis Adjustment |
| Tester Display |
|---|
| BSM Master Beam Axis Display |
NOTICE:
Before replacing the blind spot monitor sensor LH, visually check for damage to the stud bolts or area surrounding the blind spot monitor sensor LH.
If there is any damage to the stud bolts or area surrounding the blind spot monitor sensor LH, perform Blind Spot Monitor Sensor Installation Condition Inspection and adjust according to the result.
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| OK | | END |
| NG | | REPLACE BLIND SPOT MONITOR SENSOR LH |
| 3. | CHECK INSTALLATION CONDITION |
(a) Check the installation condition of the blind spot monitor sensor LH.
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OK:
The blind spot monitor installation position is within the specified range
| OK | | GO TO STEP 5 |
|
| 4. | ADJUST THE INSTALLATION POSITION OF THE BLIND SPOT MONITOR SENSOR LH |
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|
| 5. | PERFORM BEAM AXIS CONFIRMATION |
(a) Perform Blind Spot Monitor Beam Axis Confirmation using the Techstream.
Click here
| Tester Display |
|---|
| BSM Master Beam Axis Adjustment |
| Tester Display |
|---|
| BSM Master Beam Axis Display |
| OK | | END |
| NG | | REPLACE BLIND SPOT MONITOR SENSOR LH |
READ NEXT:
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Record the current settings before customizing.
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