2010 Land Rover Range Rover (LM) V8-5.0L Technical Service Bulletin # TEC860804 Date: 041220

2010 Land Rover Range Rover (LM) V8-5.0L Technical Service Bulletin # TEC860804 Date: 041220

Antitheft System - False Alarm/'Bonnet Open' Message

No: 86/08/04/NAS

FGN LM419

Ref:

Issue: 1

Date: 20 December 2004

Hood Alarm Switch Sensitivity

AFFECTED VEHICLE RANGE:

New Range Rover (LM) All

SITUATION:

FALSE ALARM ACTIVATION AND/OR "BONNET OPEN" MESSAGE DISPLAYED

Build tolerances in the hood and hood switch can allow the switch contacts to close. This causes the alarm to see a hood-open condition that in turn

activates the vehicle security alarm. The customer may also see a "bonnet open" message displayed on the message center.

RESOLUTION:

INVESTIGATE HOOD SWITCH FUNCTION

Should a customer complain of unexplained alarm messages or activation, follow the procedure in this TIB to confirm that the hood switch triggered

the alarm activation. If indicated replace the switch.

PARTS INFORMATION:

DDW WARRANTY CLAIMS:

DDW requires the use of causal part numbers. Labor only claims must show the causal part number with a quantity of zero.

Normal warranty policy and procedures apply.

Material allowance is included in labor operation.

REPAIR PROCEDURE

2010 Land Rover Range Rover (LM) V8-5.0L Page 99

INVESTIGATE ALARM TRIGGER CAUSE AND REPLACE SWITCH IF INDICATED

NOTE:

The battery must be capable of maintaining a full charge during this process which is expected to take 15-18 minutes total.

1. Verify the battery is fully charged (12.6 V or greater).

2. Connect a battery charger set on a low amp current charge to maintain battery state during this process.

3. Connect 14 to the vehicle and load disc "Range Rover 14" or a later version.

4. Begin a new diagnostic session.

NOTE:

For each alarm trigger the following data is displayed:

^ Alarm trigger ID - this is the alarm trigger ID for the alarm displayed on the screen

^ Alarm description - this describes which part of the vehicle triggered this alarm

^ Alarm code - this is the alarm trigger code

^ Alarm frequency - this is the number of times the relevant alarm has been triggered

^ Alarm present - this displays whether it is an old trigger or the last alarm triggered

5. Following all of the on-screen instructions perform the following:

^ Select "System Diagnostics".

^ Select "Security".

^ Select "Vehicle Maintenance".

^ Select "Alarm Trigger History".

NOTE:

GTR lookup sequence is as follows:

GTR Home > NAS > Service Information/ LM - New Range Rover/2005 > Workshop Manual - Service Procedures > "Alarm System and Horn"

> "Repairs" > "Switch - bonnet" link

6. If a fault code is stored identifying that the hood (bonnet) switch triggered the alarm, refer to GTR Workshop Manual section 86.77.20 and

replace the switch with a new specification switch (YUE000162).

7. If there is no fault code stored identifying that the hood switch triggered the alarm, perform further investigation as required.

8. When repairs are completed, reset the alarm trigger history.

2010 Land Rover Range Rover (LM) V8-5.0L Page 100

9. End the diagnostic session and return to the "Welcome" screen.