SSM72330

TOPIx - SSM72330 - `Radar Sensor Blocked` message displayed on Instrument Cluster
Reference
SSM72330
Models
Discovery Sport / L550
Page 1 of 1
LR4 / L319
Range Rover / L405
Range Rover Evoque / L538
Range Rover Sport / L494
Title
`Radar Sensor Blocked` message displayed on Instrument Cluster
Category
Electrical
Last modified
24-Jul-2015 00:00:00
Symptom
206000 Warning Indicators
Content
Issue: The message "Radar Sensor Blocked" appears in instrument pack display. If blockage occurs while ACC is being used, “Driver
Intervene” and/or "Radar sensor blocked" message will appear on the cluster and DTC C1A67-97 set.
Blockage can also occur when ACC is not being used.
Cause: "Radar Sensor Blocked" indicates that the Adaptive Speed Control system's visibility has been reduced due to an obstruction.
ACC continually scans for objects ahead and, if it sees no objects i.e. vehicles, road signs, lamp posts, guard rails etc., it will indicate a
blockage even if the ACC is not used.
The C1A67-97 DTC flags a radar blockage situation and not a system fault.
Action:
1. Check for obstructions (ice, dirt, paint overspray, badges, license plates, bumper protection cover, etc.) in front of the radar. Clear
obstruction if it exists.
2. Check vertical level of radar (see TOPIX under 310-03 Speed Control sensor adjustment) and adjust if necessary. If the vertical level
is adjusted service alignment will also be required using SDD
3. Check for labels on back of bumper in front of radar. Verify if the harness is placed correctly and not in front of radar. Check radar
correctly positioned on ball-studs, and bracket secured to body.
4. If ice, heavy snow, wet snow or heavy rain has been encountered, then the "Radar Sensor Blocked" message (and DTC C1A67-97) is
likely to be genuine and will clear automatically once sufficient objects are seen (a historic DTC C1A67-97 will exist). Blockage is
designed to set in these conditions, this is normal operation and the radar does not need to be changed. Do not replace the ACC module
if the DTC is historical. Delete the DTC and perform a test drive to check the operation of the system.
5. Under rare circumstances - where there are very few objects around the vehicle i.e. snow covered, featureless country, or desert
roads – DTC C1A67-97 can be logged and the message “Driver Intervene” and/or "Radar sensor blocked" shown indicating a blockage.
Once vehicle returns to environment with more objects blockage will clear automatically, (a historic DTC C1A67-97 will exist).
6. If the customer experiences these circumstances please DO NOT replace the ACC radar (Speed Control Sensor), as it is likely that
the customer will return with the same complaint. Land Rover will release a Technical Service Bulletin in the near future detailing further
steps required.
http://topix.landrover.jlrint.com/topix/service/archive/557757/index
7/28/2015