# Service bulletin B340217

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10146577
- Published by NHTSA: 2018\-11\-05
- Manufacturer's number: B340217
- Manufacturer's date: 2017\-03\-01
- NHTSA component: FORWARD COLLISION AVOIDANCE

## NHTSA's summary

?SERVICE ACTION: SERVICE ACTION: PROGRAM THE DYNAMIC STABILITY CONTROL \(DSC\) UNIT . When the collision warning system is active, the pre\-pressurization of the Dynamic Stability Control \(DSC\) \(allowing maximum deceleration braking\) is not working correctly. However when the brake is applied by the driver, normal braking force \(deceleration\) is experienced. Normal braking functions are not affected. Only the braking function of the collision warning system is affected. Error of the coded data in the DSC

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2017/MC-10146577-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2017/MC-10146577-0001.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Driver assistance

## Vehicles listed

- 2016 to 2017 BMW X1
- 2016 to 2017 BMW X1 SAV

## Other bulletins for the same vehicles and component

- [B660523](/bulletins/10244242.md), 2023-11-01, Service bulletin: VEHICLE SPEED CONTROL; LANE DEPARTURE; FORWARD COLLISION AVOIDANCE. Various functions of the camera\-based driver assistance systems \(ADCAM system\) can lead to customer complaints.
- [B340820](/bulletins/10179813.md), 2020-09-14, Service bulletin: ELECTRONIC STABILITY CONTROL:AUTOMATIC \(ASC\). DELIVERY STOP \- OBD ACCESS IN DSC CONTROL UNIT: Aftermarket scan tools cannot read fault codes in the Dynamic Stability Control \(DSC\) unit via the On Board Diagnostic \(OBD\) socket. The DSC data is not processed correctly in the BDC and therefore cannot transmit any diagnostic requests via the OBD using aftermarket scan tools.
- [B610920](/bulletins/10174023.md), 2020-04-20, Service bulletin: ELECTRONIC STABILITY CONTROL:AUTOMATIC \(ASC\); ELECTRICAL SYSTEM; STEERING; SUSPENSION. CHECK CONTROL MESSAGES FOR BRAKE SUSPENSION AND AIR BAG SYSTEM MALFUNCTION: Multiple check control messages \(CCM\) can display for brake suspension and air bag system malfunction. The customer may also complain about any of the following: Engine can no longer be switched off Drive position \(D\) cannot be engaged on the gear selector switch \(GWS\) Reduction of steering assist After an engine emergency shut\-off \(either a prolonged long press; or 3 consecutive short presses of the Start/Stop button\) and the vehicle going to sleep \(identifiable by the lighting of the "Start/Stop button"\) everything resumes normal functionality and the CCM messages no longer appear.
- [B660916](/bulletins/10151333.md), 2018-12-10, Service bulletin: VEHICLE SPEED CONTROL:CRUISE CONTROL; EQUIPMENT; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL. """Collision Warning Failed"" or ""Pedestrian Warning Failed"" CCM Display. While driving, a Check Control Message \(CCM\) is displayed advising of the following: Front collision warning failed Pedestrian detection failed The following fault code is stored in the KAFAS \(Camera\-based Driver Assistance System\): 0X800AC4 \- Camera calibration failed The KAFAS camera is not properly mounted and secured to the mounting bracket on the windshield; And/ or: The mounting bracket glued to the windshield is not installed correctly. The pictures below show both incorrect and correct installation. This picture shows the KAFAS camera installed in the bracket. Notice the spacing highlighted by the ""green lines"""
- [B660915](/bulletins/10147890.md), 2018-11-13, Service bulletin: ELECTRICAL SYSTEM; LANE DEPARTURE; FORWARD COLLISION AVOIDANCE. Sporadically, a CCM \(Check Control Message\) is displayed advising that the Camera\-based Driver Assistant system has failed. During this failure, all KAFAS \(Camera\-based driver assistance systems\) system functionalities are inoperative. The affected functionalities are: Pedestrian Detection Front Collision Warning Lane Departure Warning Speed Limit Info \(if equipped\) Note: The system is functional after the interior temperature has cooled down or by cycling the ignition off and on again.
- [B340416](/bulletins/10147014.md), 2018-11-05, Service bulletin: SERVICE BRAKES, AIR:ANTILOCK:WHEEL SPEED SENSOR; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:WHEEL SPEED SENSOR/TONE RING; ELECTRONIC STABILITY CONTROL \(ESC\); BACK OVER PREVENTION; WHEELS. DRIVING STABILIZATION CONTROL FAILURE: ABS/DSC INSTRUMENT LAMPS LIT. ABS/DSC lamps lit in instrument cluster. Fault codes may be saved in the DSC control unit: 480AAD \- wheel speed sensor \- rear left \- smoke monitoring 480AAC \- wheel speed sensor \- rear left \- unexpected jump in the signal 4809B9 \- wheel speed sensor \- rear left \- driving off recognition faulty 480716 \- wheel speed sensor \- rear left \- plausibility: direction of rotation 4809B7 \- wheel speed sensor \- rear left \- missing tooth 480719 \- wheel speed sensor \- rear right \- plausibility: direction of rotation 480686 \- wheel speed sensor \- rear right \- driving off recognition faulty 480AB3 \- wheel speed sensor \- rear right \- unexpected jump in the signal 480AB4 \- wheel speed sensor \- rear right \- smoke monitoring 4809C2 \- wheel speed sensor \- rear right \- missing tooth Rear wheel pulse generator \(wheel speed sensor\) retaining screw is loose, missing or broken.
- [B662116](/bulletins/10146906.md), 2018-11-05, Service bulletin: ENGINE; LANE DEPARTURE: SENSING SYSTEM: OTHER; SERVICE BRAKES. KAFAS CAMERA\-BASED ASSISTANCE SYSTEM LIMITS. INFORMATION The situations described above may all be caused by known limitations of the system such as: Dirty windshield Incomplete calibration process Unsuccessful calibration Restricted visibility\- weather conditions or parked vehicles Missing lamps on target vehicle Non\-standard vehicle exterior surfaces Insufficient ambient lighting Abrupt motion of target vehicle.

JSON: [/v1/bulletins/10146577](/v1/bulletins/10146577)

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