Land Rover Defender: Anti-Theft - Passive - Component Location, Overview
COMPONENT LOCATION
COMPONENT LOCATION - 1 OF 4
NOTE: Right Hand Drive (RHD) vehicle is shown, Left Hand Drive (LHD) vehicle is similar.
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- Immobilizer Antenna Unit (IAU)
- Ignition switch
- Body Control Module (BCM)/ Gateway Control Module (GWM)
COMPONENT LOCATION - 2 OF 4
NOTES:
- RHD vehicle is shown, LHD vehicle is similar.
- Vehicle with 5 doors is shown, Vehicle with 3 doors is similar.
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- Radio Frequency (RF) receiver
- Remote Function Actuator (RFA)
COMPONENT LOCATION - 3 OF 4
NOTES:
- RHD vehicle is shown, LHD vehicle is similar.
- Vehicle with 5 doors is shown, Vehicle with 3 doors is similar.
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- Low Frequency (LF) - Front passenger compartment
- LF - Right passenger compartment
- LF - Left luggage compartment
- LF - Rear passenger compartment - Only for passive start system
- LF - Left passenger compartment
COMPONENT LOCATION - 4 OF 4
NOTES:
- RHD vehicle is shown, LHD vehicle is similar.
- Vehicle with 5 doors is shown, Vehicle with 3 doors is similar.
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- Passive entry transceiver - Front
- Passive entry transceiver - Rear
OVERVIEW
The passive start system relies on the detection of a uniquely coded smart key through LF antennas strategically situated within the vehicle. The LF antennas sense when the smart key is in the active transmission zone of the LF antennas. The transmission zone allows the smart key to be detected inside the vehicle. For this reason the orientation and position of the antennas is critical to the correct functioning of the system. The smart key also operates the passive entry system.
The passive start system provides a secure interface between the BCM/ GWM and the Powertrain Control Module (PCM). The interface prevents unauthorized starting of the engine. Encoded data exchange between the smart key and multiple control modules immobilizes the engine crank system and the fuel system.
Engine starting is initiated when the encoded data exchange between the smart key and the control modules is verified. The engine management system then allows engine crank and fueling when an authorization data message is received from the BCM/ GWM.
The engine can be started by pressing the ignition switch when PARK position is selected and the brake pedal is pressed.
READ NEXT:
Anti-Theft - Passive - Description
LF ANTENNAS
NOTES:
RHD vehicle is shown, LHD vehicle is similar.
Vehicle with 5 doors is shown, Vehicle with 3 doors is similar.
LF - Front passenger compartment
LF - Right passenger compartme
Anti-Theft - Passive - Operation
PASSIVE START SYSTEM
The RFA prompts each of the internal LF antennas to output a signal. When the
smart key is in the passenger
compartment, the smart key detects the LF signals. The smart key respo
Anti-Theft - Passive - Diagnosis and Testing
DIAGNOSIS AND TESTING
PRINCIPLES OF OPERATION
For a detailed description of the anti-theft - passive system and operation,
refer to the relevant description and
operation section of the workshop manu
SEE MORE:
Steering Wheel Vibration/Shimmy While Driving
GENERAL PROCEDURES
GENERAL EQUIPMENT
Jaguar Land Rover approved battery support unit
Jaguar Land Rover approved diagnostic equipment
CHECK
NOTES:
Until flat-spots are removed, significant vibration/shimmy may be
present. A road test is required to make
sure temporary tire flat-spots are rem
Rear traffic monitor
Make sure the relevant safety warnings
have been read and understood before
driving the vehicle.
Note: The quality of the camera views may
vary in different lighting conditions.
Note: Depending on the market in which
the vehicle is used, an audible and visual
warning is provided during a reversing
