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Frelander 2. Manual - part 489

Item

Part Number

Description

Battery

Auxiliary Junction Box (AJB)

Rear door module

Driver door module

Passenger door module

Exterior mirror lamp

Rear door latch switch

Vanity mirror lamp

Rear interior lamp

Front interior lamp (includes map reading lamps on vehicles from 2009MY)

Liftgate release motor

Luggage compartment lamp

Glovebox lamp

Driver footwell lamp

Passenger footwell lamp

RF receiver

CJB

Driver door latch switch

Passenger door latch switch

Driver door lamp

Passenger door lamp

Exterior mirror lamp

Battery Junction Box (BJB)

PRINCIPLES OF OPERATION

Operation and control of the interior lamps can be split into 3 main groups.

Front and Rear Interior Lamps, Footwell Lamps, and Load Space Lamp

The CJB controls operation of these lamps by providing a voltage feed to both sides of each lamp. By increasing or
decreasing the voltage supplied to one side of the lamp, the CJB controls the current flow through the lamp and thus the
lighting level. This feature is controlled via the interior lamp Field Effect Transistor (FET), which is integral with the CJB
and allows the CJB to ramp up and ramp down the illumination levels of the lamps when required. The CJB controls the
ramp up time to 1.3 seconds, and the ramp down time to 2.6 seconds.

If the vehicle is involved in an accident violent enough to trigger the Supplemental Restraint System (SRS), the Restraints
Control Module (RCM) will provide a 250 Hz 'crash' signal to the CJB. On receipt of this signal the CJB will illuminate the
front and rear interior lamps, the footwell lamps and the load space lamp for up to 30 minutes. The CJB will extinguish the
interior lamps prior to the 30 minute period elapsing if the crash signal from the RCM is replaced with a 10 Hz 'normal'
signal.

Vanity Mirror and Glovebox Lamps

The vanity mirror lamps and the glovebox lamp are provided a voltage feed by the CJB. When vanity mirror lamp operation
is selected by pressing the relevant switch, a ground path is created causing the lamp to illuminate. Glovebox lamp
illumination is controlled by a microswitch which is integral with the lamp assembly. When the glovebox is opened, the
switch contacts close creating a ground path for the lamp.

Door and Mirror Lamps

Operation of the door and mirror lamps is controlled by the door modules in conjunction with the CJB. The CJB provides a
feed to each door latch switch. When a door is opened, the switch contacts close providing a feed to the relevant door
module. On receipt of this feed, the module illuminates its door lamp by providing a feed and ground path.

The driver and front passenger door modules also control operation of the mirror lamps. When a valid unlock request is
received from the RF receiver, the CJB notifies the driver and front passenger door modules via the medium speed CAN
bus. On receipt of the CAN bus message the door module illuminates the relevant mirror lamp by providing a feed and
ground path.

Interior Lighting - Interior Lighting

Diagnosis and Testing

Principles of Operation

For a detailed description of the interior lighting system, refer to the relevant Description and Operation section in the
workshop manual.
REFER to:

Interior Lighting

(417-02 Interior Lighting, 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.

1. Verify the customer concern.

2. Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection

Mechanical

Electrical

Bulbs

Fuses/relays (refer to electrical guide)
Wiring harness
Correct engagement of electrical connectors
Loose or corroded connections

3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before

proceeding to the next step.

4. If the cause is not visually evident, check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index.

DTC Index

• NOTE: If the control module or a component is suspect and the vehicle remains under manufacturer warranty, refer to the
Warranty Policy and Procedures manual (section B1.2), or determine if any prior approval programme is in operation, prior
to the installation of a new module/component.

• NOTE: Generic scan tools may not read the codes listed, or may read only five digit codes. Match the five digits from the
scan tool to the first five digits of the seven digit code listed to identify the fault (the last two digits give extra
information read by the manufacturer-approved diagnostic system).

• NOTE: When performing voltage or resistance tests, always use a digital multimeter (DMM) accurate to three decimal
places and with a current calibration certificate. W hen testing resistance, always take the resistance of the DMM leads into
account.

• NOTE: Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.

• NOTE: If DTCs are recorded and, after performing the pinpoint tests, a fault is not present, an intermittent concern may
be the cause. Always check for loose connections and corroded terminals.

DTC

Description

Possible Cause

Action

B113C11 Hazard switch illumination -

circuit short to ground

Hazard switch illumination
circuit - short to ground

Refer to electrical circuit diagrams and check
hazard switch illumination circuit for short to
ground

B113C15 Hazard switch illumination -

circuit short to power or
open

Hazard switch illumination
circuit - short to power, open
circuit

Refer to electrical circuit diagrams and check
hazard switch illumination circuit for short to
power, open circuit

B1D1312 Interior Lights #1 Circuit -

circuit short to power

Instrument panel interior lights
circuit - short to power

Refer to electrical circuit diagrams and check
instrument panel interior lights circuit for
short to power

B1D1314 Interior Lights #1 Circuit -

circuit short to ground or
open

Instrument panel interior lights
circuit - short to ground, open
circuit

Refer to electrical circuit diagrams and check
instrument panel interior lights circuit for
short to ground, open circuit

B1D1A12 Interior Lights Circuit 'C' -

circuit short to power

Roof console interior lights
circuit - short to power

Refer to electrical circuit diagrams and check
roof panel interior lights circuit for short to
power

B1D1A14 Interior Lights Circuit 'C' -

circuit short to ground or
open

Roof console interior lights
circuit - short to ground, open
circuit

Refer to electrical circuit diagrams and check
roof panel interior lights circuit for short to
ground, open circuit

U025200 Lost Communication With

Lighting Control Module -
Rear 'B'

Lost communication with trailer
module

Carry out the associated network test for
this DTC using the manufacturer approved
diagnostic system

U201011 Switch Illumination - circuit

short to ground

Switch illumination circuit -
short to ground

Refer to electrical circuit diagrams and check
switch illumination circuit for short to ground

DTC

Description

Possible Cause

Action

U201015 Switch Illumination - circuit

short to power or open

Switch illumination circuit -
short to power, open circuit

Refer to electrical circuit diagrams and check
switch illumination circuit for short to power,
open circuit

Content .. 487 488 489 490 ..