Lexus ES: Slave Module Horizontal Axis Misalignment (C1AC2)
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 system on, the blind spot monitor sensor may store this DTC by mistake.
- 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.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1AC2 | Slave 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 system is turned 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.
Click here
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If the results are not as specified, it is possible that the blind spot monitor sensor installation area (frame, stud bolt) is deformed, so make corrections 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 |  | GO TO STEP 3 |
|
| 2. | PERFORM BEAM AXIS CONFIRMATION |
(a) Clean the rear bumper.
(b) Perform Blind Spot Monitor Beam Axis Confirmation using the Techstream.
Click here
| Tester Display |
|---|
| BSM Slave Beam Axis Display |
| Tester Display |
|---|
| BSM Slave Beam Axis Adjustment |
| 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.
Click here
HINT:
Take the appropriate action in accordance with the result.
|
| 4. | PERFORM BEAM AXIS CONFIRMATION |
(a) Install the rear bumper.
for Single Type: Click here
for Dual Type: Click here
(b) Perform Blind Spot Monitor Beam Axis Confirmation using the Techstream.
Click here
| Tester Display |
|---|
| BSM Slave Beam Axis Display |
| Tester Display |
|---|
| BSM Slave Beam Axis Adjustment |
| OK | | END |
| NG | | REPLACE BLIND SPOT MONITOR SENSOR LH |
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