Land Rover Defender: Anti-Theft - Active - Diagnosis and Testing
DIAGNOSIS AND TESTING
PRINCIPLES OF OPERATION
Vehicle Immobilizer Control Module (VIM)
For a detailed description of the anti-theft - active operation, refer to the
relevant description and operation section of
the workshop manual. REFER to: Anti-Theft - Active (Anti-Theft - Active,
Description and Operation).
INSPECTION AND VERIFICATION
CAUTION:
Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution
of control modules does not
guarantee confirmation of a fault, and may also cause additional faults in the
vehicle being tested and/or the
donor vehicle
NOTES:
- Guided Diagnostics must be followed and the repair advised by the
process completed. Failure to do so
may result in the rejection of any warranty claim made.
- If a control module or a component is at fault and the vehicle
remains under manufacturer warranty, refer
to the Warranty Policy and Procedures manual, or determine if any prior
approval program is in operation,
prior to the installation of a new module/component.
- When performing voltage or resistance tests, always use a digital
multimeter that has the resolution ability
to view 3 decimal places. For example, on the 2 volts range can measure 1mV
or 2 K Ohm range can
measure 1 Ohm. When testing resistance always take the resistance of the
digital multimeter leads into
account.
- Check and rectify basic faults before beginning diagnostic routines
involving pinpoint tests.
- Verify the customer concern
- Visually inspect for obvious signs of damage and system integrity
Visual Inspection
- If an obvious cause for an observed or reported concern is found,
correct the cause (if possible) before
proceeding to the next step
- If the cause is not visually evident check the system for any set
diagnostic trouble code(s) and proceed to the
Diagnostic Trouble Code(s) (DTC) index
- Check Jaguar Land Rover claims submission system for open campaigns.
Refer to the corresponding bulletins
and SSMs which may be valid for the specific customer complaint and complete
the recommendations as
required
SYMPTOM CHART
CORRECT INSTALLATION OF THE VOLUMETRIC SENSOR
The volumetric sensor is located in a central position in the overhead
console. The volumetric sensor allows the
interior of the vehicle to be monitored when the vehicle is double locked. In
cases where customers have reported
"false-alarm" triggers of the vehicle anti-theft alarm and where the volumetric
sensor has been identified as the last
known alarm trigger (see diagnostic instructions below), this may indicate an
issue with the installation of the
volumetric sensor rather than an internal failure of the sensor itself.
In light of this, when first faced with this issue, the existing volumetric
sensor should be carefully removed and refitted.
Care should be taken to make sure that the sensor and associated connectors are
installed correctly and securely.
See illustration and video for correct installation, when installed conduct
'push-pull-push' on connections to make sure
of correct engagement. Make sure the sensors are pushed fully home and abut
against the console, there should be
equal placement all around the sensor and it should not be angled when compared
to the surface of the console, no
large visible gap should be seen and any small gap should be equal all around
the sensor when viewed from the front
and the rear of the console, use a flashlight to aid with gap visibility, REFER
to: Overhead Console (Instrument
Panel and Console, Removal and Installation).
If the issue reoccurs after refitting of the volumetric sensor, then the sensor
should be replaced.
READING ALARM TRIGGER HISTORY THROUGH PATHFINDER DIAGNOSTICS
NOTE:
Make sure to take a recording of the alarm trigger history and add this to the
warranty claim
To determine the details of recent anti-theft alarm triggers on Pathfinder
vehicles, the following steps should be
followed:
- Using the Jaguar Land Rover approved diagnostic equipment, connect to
the vehicle through the Vehicle
Communication Interface (VCI) unit
- Load in the Vehicle Identification Number (VIN)
- SELECT 'ECU Diagnostics'
- SELECT 'Body Control Module (BCM)'
- SELECT 'ECU Functions From List'
- SELECT 'Alarm Trigger History' and follow on-screen instructions to view
recent alarm trigger history
READ NEXT:
REMOVAL AND INSTALLATION
REMOVAL
NOTE:
This procedure contains some variation in the illustrations depending
on the vehicle specification, but the
essential information is always correct.
This p
REMOVAL AND INSTALLATION
REMOVAL
NOTE:
This procedure contains some variation in the illustrations depending
on the vehicle specification, but the
essential information is always correct.
This p
SEE MORE:
GENERAL PROCEDURES
GENERAL EQUIPMENT
CHECK
NOTES:
The headlamp setting is 1.2 % below horizontal and parallel.
This procedure contains illustrations for left side components, right
side components are similar.
Make sure that the vehicle is standing on a level surface.
This procedure contains
COMPONENT LOCATION
COMPONENT LOCATION - 1 OF 3
NOTES:
Right Hand Drive (RHD) is shown, Left Hand Drive (LHD) is similar.
Vehicle with 5 doors is shown, vehicle with 3 doors is similar.
Interior door handle - Driver door
Exterior door handle - Driver door
Driver door latch
Interior door han
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