BeCM - Reverse Mirror Dip Condition
12/20/9686/18/96/US
SUBJECT:
BeCM Updates and Reverse Mirror Dip Function
MODEL:
Range Rover 4.0/4.6
AFFECTED VEHICLES:
LP All
LH
LJ
LD
DETAIL
Lack of familiarity with certain functions of the BeCM on Range Rover 4.0/4.6 vehicles can lead to the unnecessary replacement of control modules. Please note the following information and ensure that all technicians are aware of these functions and upgrades. This knowledge will help to avoid customer confusion and unnecessary repair efforts.
NOTE:
Reverse mirror dip functions are clearly explained in the Range Rover Owner's Manual, Section 2.
Customer complaints about the reverse mirror dip function have caused some BeCM replacements where no fault exists. In these cases when reverse was selected, the mirror tilted up rather than dipping down as it should. In the units examined so far an incorrect setting (from the factory or the customer) has been the only problem. If the BeCM is replaced to correct the perceived reverse mirror dip problem, the symptoms will disappear because the new BeCM has factory set defaults at a correct dip position. The problem is corrected but in fact there was NO FAULT, only incorrect information stored in the BeCM. If you experience this type of complaint check the memory settings for the reverse mirror dip position.
ACTION REQUIRED
Upon customer complaint for the symptoms outlined, perform the specified checks before executing repairs.
PARTS INFORMATION
AMR6402 - Replacement BeCM unit
PROCEDURE
Reverse Mirror Dip Adjustment/Memory:
1. Keep the vehicle in reverse and reset the door mirror position to the desired dip position.
2. STORE THE DIP POSITION IN MEMORY. (This is done by holding down the seat switchpack memory store button and selecting either Memory 1 or Memory 2).
3. Once the position is stored the message center will beep and display "Mirror Dip Stored."
4. Move gear lever to drive to verify mirrors return to drive position and then check reverse dip again.
WARRANTY:
Information Only
COMP.CODE:
SRO:
Reverse Mirror Dip (Continued)
The mirror adjustment and memory selection process will store the correct dip mirror position for the selected memory (1 or 2), The other memory may also have the dip mirror position tilted up rather than down, so a check should be performed to see if it is positioned correctly. Reposition it if required (storing new dip position in the second memory position).
The Owner's Manual for Range Rover 4.0/4.6 contains information on reverse dip mirror functionality, toggling the dip function on-off for a selected memory position (possibly another perceived fault, i.e. reverse dip inoperative), and mirror position storing.
Upgraded BeCM Functions:
All replacement BeCM units purchased from Land Rover will be the latest specification unit (currently AMR6402). As a result, a newly installed BeCM may provide unfamiliar functionality to an owner. (If you have new BeCM units in inventory, be aware that they may contain some or all of these upgrades.) when delivering a repaired vehicle with a new BeCM please ensure that the customer is aware of the following upgrades:
1. Sunroof anti-boom feature - when auto open is selected the sunroof will only open about 3/4 of the way because this position has been determined to provide the least "boom" noise from wind turbulence. Full open may be manually selected.
2. Slam Lock Function deleted - Depressing the drivers door sill lock and then "slam locking" the vehicle is now inhibited. The door sill button will pop up reminding the driver to lock the vehicle with the remote or key. Auto-Relock will activate if the vehicle is left without door opening activity, or correct remote/key locking after a slam lock attempt.
3. Auto-Relock - This feature has been enhanced, but these functions should be largely transparent to the owner. Automatic relock features are modified so that a vehicle will relock after a period of time without door opening activity even if a number of remote unlock signals have been sent.
4. Key Inhibit - The software has been improved to reduce the possibility of a "sticking" key.
5. Daytime Running Lights (DRL) - Used in Canada, this feature now turns off the DRL when the transmission is placed in "PARK." The DRL is turned back on again when a drive gear is selected.