2016.

0 RANGE ROVER (LG), 418-00

MODULE COMMUNICATIONS
NET WORK
S P E C I F I C AT I O N S

Torque Specifications

DESCRIPTION NM LB-FT LB-IN

Central junction box (CJB) nuts 9 7 80

Battery junction box (BJB) nuts 9 - 80

BJB wiring harness M8 nuts 12 9 -

BJB wiring harness M5 nuts 5.5 - 49

Dual battery junction box (DBJB) nuts 9 - 80

DBJB wiring harness nuts 20 15 -

Dual battery module (DBM) bolts 4.1 - 36

Gateway module bolts 10 7 88

Quiescent current control module nuts 9 - 80

2016.0 RANGE ROVER (LG), 418-00

MODULE COMMUNICATIONS
NET WORK
DIAGNOSIS AND TESTING

P R I N C I P L E S O F O P E R AT I O N

For a detailed description of the Communications Network, refer to the

relevant Description and Operation sections in the workshop manual.

I N S P E C T I O N A N D V E R I F I CAT I O N

CAUTIONS:

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.

Electronic modules are sensitive to static electrical charges. If

exposed to these charges, damage may result.
 NOTES:

If a control module or a component is suspect and the vehicle

remains under manufacturer warranty, refer to the Warranty Policy
and Procedures manual, or determine if any prior approval
programme is in operation, prior to the installation of a new
module/component.

When performing voltage or resistance tests, always use a digital

multimeter accurate to three decimal places, and with an up-to-
date calibration certificate. 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.

1. Verify the customer concern

2. Visually inspect for obvious signs of damage and system integrity

Visual Inspection

ELECTRICAL

Fuses (refer to electrical guide)

Wiring harness

Correct engagement of electrical connectors

Loose or corroded connections

Routing of fibre optic harnesses

Correct engagement of optical connectors

Correct placement of optical connectors (ring order)

Correct assembly of optical connectors (backout, etc)

Damage to fibre (chafing, abrasion, kinking, cuts, etc)

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

SYMPTOM CHART

SYMPTOM POSSIBLE CAUSES ACTION

MOST network fault - Touch MOST ring broken GO to

Screen (TS) soft keys greyed out Pinpoint
Control module on MOST network
and inoperative Test B.
power or ground circuit open circuit,
high resistance

Control module on MOST network

internal failure

MOST network fault - Touch Touch Screen (TS) power or ground GO to

Screen (TS) blank circuit open circuit, high resistance Pinpoint
Test G.
Wake up signal not received by the
Touch Screen (TS)

Touch Screen (TS) internal failure

CONTROLLER AREA NETWORK (CAN)

Control Module Connections to the CAN Harness

Control modules are connected to the CAN harness either in a 'loop' or

'spur' configuration. In the 'loop' type configuration the CAN harness loops
into the module (via two connector pins) and then loops out of the module
(via another two connector pins). In the 'spur' type configuration, a harness
spur is spliced into the main 'backbone' of the CAN harness and the module
is connected to the harness spur via two connector pins.

CAN Harness Architecture

For a detailed description of the CAN Networks and architecture, refer to

the relevant Description and Operation section in the Workshop Manual.
CAN Network Integrity Tests

If a control module is suspected of non-communication, the Network

Integrity test application available on the manufacturer approved diagnostic
system can be used to confirm if communication is possible between the
control modules on the vehicle and the manufacturer approved diagnostic
system (via the J1962 diagnostic connector ). The results from the test can
be used to determine if either a single module or multiple modules are
failing to communicate.

CAN Terminating Modules

If the Network Integrity test indicates that one or more module on one of
the CAN networks (HS or MS) are failing to communicate, there are several
checks that can be made. The first step is to identify if both of the CAN
terminating modules on each individual CAN Bus are communicating. If
both CAN terminating modules for each individual CAN Bus are
communicating (identified via the Network Integrity test), then it can be
confirmed that the main 'backbone' of the CAN harness is complete. The
main 'backbone' of the CAN harness consists of all the modules connected
to the CAN harness via a 'loop' configuration and also includes the two
terminating modules.

Communication with both CAN terminating modules via the Network

Integrity test confirms the physical integrity of the main 'backbone' of the
CAN harness (and the harness spur to the J1962 diagnostic connector). This
means that there is no requirement to check the resistance of the CAN
Network. This is because the standard check for 60 ohms across the CAN
High and CAN Low lines will not provide any additional information
regarding the physical condition of the CAN harness, beyond what has
already been determined from the Network Integrity test.

Non-Communication of a Terminating Module

If a Network Integrity test reveals a terminating module is failing to

communicate it can indicate a break in the main 'backbone' of the CAN
harness. The first checks should always be to confirm the power and ground
supplies to the non-communicating module are correct. Providing these are
correct, the resistance between the CAN High and CAN Low lines at the
J1962 connector can be checked to determine the integrity of the main
'backbone' of the CAN harness. After disconnecting the battery a reading
of 120 ohms would indicate an open circuit in the main 'backbone' of the
CAN harness. Alternatively, a reading of 60 ohms would indicate that there
is no open circuit fault with the main 'backbone' of the CAN harness.

It is worth noting that even if one of the terminating modules is

disconnected from the CAN harness, communications between the modules
still connected may still be possible. Therefore communication between the
manufacturer approved diagnostic system and the connected modules may
also be possible.

Locating CAN Harness Open Circuits

In the case where multiple modules, including a terminating module, are

failing to communicate, having first confirmed the power and ground
supplies are correct, the approximate location of the open circuit can be
identified from analysis of the Network Integrity test results and reference to
the relevant CAN network circuit diagrams. For example, if an open circuit
existed in a certain position on the CAN harness, any module positioned on
the Network between the J1962 connector and the open circuit should
return a response during the Network Integrity test. No responses would be
returned from any modules past the open circuit fault in the Network.

CAN Harness 'Spur' Type Configuration Circuits

If, after the initial checks (Network Integrity test using the manufacturer
approved diagnostic system, and power and ground supplies to the module
have been checked and confirmed as correct), a module that is connected
to the CAN harness via a 'spur' type configuration is suspected of not
communicating, then the physical integrity of the CAN harness 'spur' can be
checked.
This is most easily undertaken by individually checking the continuity of the
CAN High and CAN Low lines between the non-communicating module
connector (with the module disconnected) and the J1962 diagnostic
connector.

'Lost Communications' DTCs

As well as the methods described so far in this document, which can be

used to determine the location of an open circuit in the CAN harness, 'Lost
Communications' DTCs can also be used for this purpose. Lost
communication DTCs mean that a module is not receiving CAN information
from another module.

For example, if a global DTC read were to be carried out, only DTCs stored
in the modules that the manufacturer approved diagnostic system could
communicate with would be displayed. If there was an open circuit fault in a
certain position on the CAN harness, the modules that could display DTCs
would all be prior to the open circuit on the Network, and these modules
should display 'Lost Communications' DTCs with all the modules located on
the Network past the open circuit fault.

'Bus off' DTCs

The references to bus and its condition refer to the network concerned and
the modules on that network.

If a module logs a 'Bus Off' DTC, it means that the module has detected
CAN transmission errors and has disabled it's own CAN transmissions and
disconnected itself from the network in an attempt to allow the rest of the
network to function. At this point the 'Bus Off' DTC is set. A common cause
of 'Bus Off' DTCs can be a short circuit in the CAN network.

MEDIA ORIENTED SYSTEMS TRANSPORT

(MOST)
!

NOTE:

Items 1, 2, 3, 8 and 9 will always be present. The remaining items are

optional and/or market specific.

ITEM DESCRIPTION

1 Touch Screen (TS)

2 Integrated Audio Module (IAM)

3 Audio Amplifier Module (AAM)

4 TV Control Module (TVCM)

5 Digital Radio Control Module (DRCM)

6 Navigation Control Module (NCM) - Japan

 7 Rear Seat Entertainment Control Module (RSECM)

8 Instrument Cluster (IC)

9 MOST diagnostic connector

Overview

The basic guidelines are covered in the description and operation section,
such as not attempting to repair fibre optic cables, but additional
precautions include:

Do not touch the exposed ends of the optical fibres (grease from skin can
contaminate the fibre)

Whenever the fibre optic cable is disconnected, cover the connectors to

prevent dust contamination

Do not expose the fibre optic cable to heat

Do not bend the fibre optic cable through less than a 25 mm (one inch)
radius

Do not use laser pens to test the fibre optic cable's ability to pass light

MOST Diagnostic Tools

There are two dedicated tools for testing the MOST system:
 !

MOST tester. The MOST tester is connected to the MOST network in place
of a control module. It will confirm receipt of any existing MOST signal and
transmit it to the next control module on the network. Perform the following
tests to validate the operation of the MOST tester. GO to Pinpoint Test A.

MOST prism. The MOST prism is connected in the same way as the MOST
tester but will simply reflect any existing signal onward to the next control
module. Using the MOST prism before or after a long run of harness may
cause a ring break as a good signal may be too weak after travelling the
extended distance. Also, the MOST prism will pass light in either direction
so will not detect reversed MOST terminals elsewhere in the network. For
these reasons, the MOST tester is the preferred tool and should be used
unless limited access does not permit it
MOST Ring Break Indication

A ring break in the MOST network is indicated by the Touch Screen (TS) soft
keys being greyed out and inoperative. Possible causes of ring breaks are
listed in the symptom chart

PINPOINT TESTS

NOTES:

'2+0' indicates that the loop harness connector consists of 2 fibre

optic terminals and 0 electrical terminals.

The MOST tester may continue to emit a tone or illuminate the LED
after the test switch is released. This does not indicate a fault.

NOTES:

'2+4' indicates that the loop harness connector consists of 2 fibre

optic terminals and 4 electrical terminals.

The MOST tester may continue to emit a tone or illuminate the LED
after the test switch is released. This does not indicate a fault.

NOTE:

The MOST tester may continue to emit a tone or illuminate the LED
after the test switch is released. This does not indicate a fault.

PINPOINT TEST A : MOST TESTER TESTS

TEST
DETAILS/RESULTS/ACTIONS
CONDITIONS

A1: MOST TESTER BATTERY TEST

1 Set the MOST tester power switch to 'on'

Is the power LED illuminated?

Yes
Test passed. GO to A2.
No
Test failed. Install a new battery into the MOST tester. GO to A1.

A2: 2+0 INPUT/OUTPUT TEST

1 Set the MOST tester power switch to 'on'

2 Set the connector selector switch to '2+0'

3 Set the indication switch to 'beep' or 'LED'

4 Remove the covers from the MOST tester 2+0 connector and the 2+0
loop harness connector

5 Connect the 2+0 loop harness to the MOST tester 2+0 connector

6 Operate the test switch and check the MOST tester beep/LED

Did the MOST tester emit a tone or illuminate the LED?

Yes
Test passed. GO to A3.
No
Test failed. MOST tester or 2+0 harness fault

A3: 2+4 INPUT/OUTPUT TEST

1 Set the MOST tester power switch to 'on'

2 Set the connector selector switch to '2+4'

3 Set the indication switch to 'beep' or 'LED'

4 Remove the covers from the MOST tester 2+4 connector and the 2+4
loop harness connector

5 Connect the 2+4 loop harness to the MOST tester 2+4 connector

6 Operate the test switch and check the MOST tester beep/LED

Did the MOST tester emit a tone or illuminate the LED?

Yes
Test passed. GO to A4.
No
Test failed. MOST tester or 2+4 harness fault

A4: ADAPTER HARNESS AND PRISM TEST

1 Set the MOST tester power switch to 'on'

2 Set the connector selector switch to '2+0'

 3 Set the indication switch to 'beep' or 'LED'

4 Remove the covers from the MOST tester 2+0 connector, the prism,
and the adapter harness connectors

5 Connect the adapter harness to the MOST tester 2+0 connector

6 Connect the prism to the adapter harness

7 Operate the test switch and check the MOST tester beep/LED

Did the MOST tester emit a tone or illuminate the LED?

Yes
Test passed
No
Test failed. MOST tester, adapter harness or prism fault

NOTE:

When connecting the MOST tester, use the 2+0 or 2+4 socket as
appropriate and set the connector selector switch to match the
socket in use

PINPOINT TEST B : MOST NETWORK INITIAL TESTS

TEST
DETAILS/RESULTS/ACTIONS
CONDITIONS

B1: MOST NETWORK INITIAL TEST 1

1 Switch on the audio/video system

2 Remove the cover from the MOST diagnostic connector

3 Set the MOST tester power switch to 'on'

4 Connect the MOST tester to the MOST diagnostic connector

5 Check the Touch Screen (TS) for indication of a MOST network fault

Has the MOST network been restored?

Yes
The MOST diagnostic connector cover is causing the MOST network
fault. GO to B2.
No
The MOST diagnostic connector cover is not causing the MOST network
fault. GO to B3.
 B2: MOST NETWORK INITIAL TEST 2

1 Disconnect the MOST tester

2 Install the cover to the MOST diagnostic connector

Has the MOST network been restored?

Yes
No further action required
No
Install a new MOST diagnostic connector cover

B3: MOST NETWORK INITIAL TEST 3

1 Check the MOST tester beep/LED

Did the MOST tester emit a tone or illuminate the LED?

Yes
MOST signal received. The MOST network fault is located downstream
of the MOST tester. GO to Pinpoint Test E.
No
MOST signal not received. The MOST network fault is located upstream
of the MOST tester. Disconnect the MOST harness connector from the
MOST tester and reconnect it to the control module. GO to Pinpoint Test
C.

NOTE:

When connecting the MOST tester, use the 2+0 or 2+4 socket as
appropriate and set the connector selector switch to match the
socket in use

PINPOINT TEST C : MOST NETWORK UPSTREAM TESTS

TEST
DETAILS/RESULTS/ACTIONS
CONDITIONS

C1: MOST NETWORK UPSTREAM TEST 1

1 Refer to the electrical circuit diagrams and identify the preceding

control module on the MOST network

Is this control module the Touch Screen (TS)?

Yes
GO to Pinpoint Test F.
No
GO to C2.

C2: MOST NETWORK UPSTREAM TEST 2

 1 Disconnect the MOST harness connector from the control module

2 Direct the MOST harness connector at a suitable surface and check

for the presence of red light

Is red light present?

Yes
The MOST network fault is in the control module or the MOST harness to
the succeeding control module. GO to C3.
No
The MOST network fault is located upstream of the disconnected control
module. Reconnect the MOST harness connector to the control module.
GO to C1.

C3: MOST NETWORK UPSTREAM TEST 3

1 Connect the MOST harness connector to the MOST tester

2 Check the Touch Screen (TS) for indication of a MOST network fault

Has the MOST network been restored?

Yes
The disconnected control module is causing the MOST network fault.
GO to Pinpoint Test D.
No
The fault is in the MOST harness between the MOST tester and the
succeeding control module. Install a new MOST harness as necessary

NOTES:

When connecting the MOST tester, use the 2+0 or 2+4 socket as
appropriate and set the connector selector switch to match the
socket in use

The MOST tester may continue to emit a tone or illuminate the LED
after the test switch is released. This does not indicate a fault.

PINPOINT TEST D : CONTROL MODULE TESTS

TEST
DETAILS/RESULTS/ACTIONS
CONDITIONS

D1: CONTROL MODULE TEST 1

1 Connect the MOST tester to the relevant control module using the
adapter harness

2 Operate the test switch and check the MOST tester beep/LED
 Did the MOST tester emit a tone or illuminate the LED?
Yes
MOST signal received. Tests inconclusive. Reconnect the MOST harness
connector to the control module and confirm that the MOST network
fault is still present. Repeat the tests from the beginning. GO to Pinpoint
Test B.
No
GO to D2.

D2: CONTROL MODULE TEST 2

1 Refer to the electrical circuit diagrams and test the relevant control
module power and ground circuits for open circuit, high resistance

Are the power and ground circuits within specification?

Yes
GO to D3.
No
Repair the power and/or ground circuit

D3: CONTROL MODULE TEST 3

1 Reconnect the MOST harness to the control module

2 Check the Touch Screen (TS) for indication of a MOST network fault

Has the MOST network been restored?

Yes
Tests inconclusive. Repeat the tests from the beginning. GO to Pinpoint
Test B.
No
Install a new control module

NOTES:

When connecting the MOST tester, use the 2+0 or 2+4 socket as
appropriate and set the connector selector switch to match the
socket in use

The MOST tester may continue to emit a tone or illuminate the LED
after the test switch is released. This does not indicate a fault.

PINPOINT TEST E : MOST NETWORK FINAL DOWNSTREAM TEST

TEST
DETAILS/RESULTS/ACTIONS
CONDITIONS

E1: MOST NETWORK FINAL DOWNSTREAM TEST 1

 1 Disconnect the MOST tester from the MOST diagnostic connector

2 Install the cover to the MOST diagnostic connector

3 Disconnect the MOST harness connector from the Touch Screen (TS)

4 Connect the MOST harness connector to the MOST tester

5 Operate the test switch and check the MOST tester beep/LED

Did the MOST tester emit a tone or illuminate the LED?

Yes
GO to E2.
No
The fault is in the harness between the MOST diagnostic connector and
the Touch Screen (TS). Install a new MOST harness as necessary

E2: MOST NETWORK FINAL DOWNSTREAM TEST 2

1 Disconnect the MOST harness connector from the MOST tester

2 Reconnect the MOST harness connector to the Touch Screen (TS)

3 Check the Touch Screen (TS) for indication of a MOST network fault

Has the MOST network been restored?

Yes
Tests inconclusive. Repeat the tests from the beginning. GO to Pinpoint
Test B.
No
GO to Pinpoint Test G.

PINPOINT TEST F : MOST NETWORK FINAL UPSTREAM TESTS

TEST
DETAILS/RESULTS/ACTIONS
CONDITIONS

F1: MOST NETWORK FINAL UPSTREAM TEST 1

1 Disconnect the MOST harness connector from the Touch Screen (TS)

2 Direct the Touch Screen (TS) at a suitable surface and check for the
presence of red light

Is red light present?

Yes
The fault is in the MOST harness between the Touch Screen (TS) and the
Integrated Audio Module (IAM). Install a new MOST harness as necessary
No
GO to Pinpoint Test G.

PINPOINT TEST G : TOUCH SCREEN (TS) TESTS

 TEST
DETAILS/RESULTS/ACTIONS
CONDITIONS

G1: TOUCH SCREEN (TS) TEST 1

1 Using the manufacturer approved diagnostic system, check the Touch

Screen (TS) for related DTCs

Is communication possible between the manufacturer approved

diagnostic system and the Touch Screen (TS)?
Yes
Refer to the relevant DTC index
No
GO to G2.

G2: TOUCH SCREEN (TS) TEST 2

1 Refer to the electrical circuit diagrams and test the Touch Screen (TS)
power and ground circuits for open circuit, high resistance

Are the power and ground circuits within specification?

Yes
GO to G3.
No
Repair the power and/or ground circuit

G3: TOUCH SCREEN (TS) TEST 3

1 Using the manufacturer approved diagnostic system, perform a CAN

network integrity test. Refer to the electrical circuit diagrams and test
the medium speed CAN bus circuit for short circuit to ground, short
circuit to power, open circuit, high resistance

Is the medium speed CAN bus within specification?

Yes
Install a new Touch Screen (TS)
No
Repair the medium speed CAN bus circuit

DTC INDEX

For a list of Diagnostic Trouble Codes (DTCs) that could be logged on this
vehicle, please refer to Section 100-00.
2016.0 RANGE ROVER (LG), 418-00

MODULE COMMUNICATIONS NETWORK

BAT TERY JUNCTION BOX

(G1509760)

R E M O V A L A N D I N S TA L L AT I O N

REMOVAL

NOTES:

Some variation in the illustration may occur, but the essential

information is always correct.

Removal steps in this procedure may contain installation details.

1. Disconnect the battery ground cable

Refer to: Specifications (414-01 Battery, Mounting and Cables,
Specifications).
2.
!

3.
!
4.
!

Torque: 9 Nm

5.
NOTE:

Component shown removed for clarity.

!
6.
!

Torque:
M8 Nut 12 Nm
M5 Nut 5.5 Nm

I N STA L L AT I O N

1. To install, reverse the removal procedure.

2016.0 RANGE ROVER (LG), 418-00

MODULE COMMUNICATIONS NETWORK

CENTRAL JUNCTION BOX

(G1937917)

R E M O V A L A N D I N S TA L L AT I O N

REMOVAL

NOTES:

Some variation in the illustrations may occur, but the essential

information is always correct.

Some components shown removed for clarity.

Removal steps in this procedure may contain installation details.

RHD shown, LHD is similar.

! All vehicles

1. Refer to: Specifications (414-00 Battery and Charging System -

General Information, Specifications).
2.
"

! Right-hand drive vehicles

3.
"
 ! All vehicles

4.
"

5.
"
6.
"

7.
"

I N STA L L AT I O N

! All vehicles
1.
"

2.
CAUTION:

Make sure the fuse cover is held in place when installing the
wiring connectors.

"

Torque: 9 Nm
3.
"

4.
CAUTION:

Make sure the fuses are correctly installed.

"
5.
"

! Right-hand drive vehicles

6.
"

! All vehicles
7.
"

8. Refer to: Specifications (414-00 Battery and Charging System -

General Information, Specifications).
2016.0 RANGE ROVER (LG), 418-00

MODULE COMMUNICATIONS NETWORK

DUAL BAT TERY JUNCTION

BOX (G1561109)

R E M O V A L A N D I N S TA L L AT I O N

REMOVAL

NOTE:

Removal steps in this procedure may contain installation details.

1.
!

2.
!
3.
!

4. Disconnect the battery ground cable.

Refer to: Specifications (414-00 Battery and Charging System -
General Information, Specifications).

5.
!
6.
!

7.
!
8.
!

9.
!
10.
!

11.
!
12.
!

Torque: 9 Nm

13.
!

Torque: 9 Nm
14.
!

Torque: 9 Nm

15.
!

Torque: 9 Nm
16.
!

Torque: 9 Nm

17.
!

Torque: 12 Nm
 I N STA L L AT I O N

1. To install, reverse the removal procedure.

2. If a new component has been installed, configure using Land Rover

approved diagnostic equipment.
2016.0 RANGE ROVER (LG), 418-00

MODULE COMMUNICATIONS NETWORK

DUAL BAT TERY MODULE (G1561110)

R E M O V A L A N D I N S TA L L AT I O N

REMOVAL

NOTE:

Removal steps in this procedure may contain installation details.

1. Refer to: Auxiliary Battery (414-01, Removal and Installation).

2.
!

Torque: 4.1 Nm
 I N STA L L AT I O N

1. To install, reverse the removal procedure.

2. If a new component has been installed, configure using Land Rover

approved diagnostic equipment.
2016.0 RANGE ROVER (LG), 418-00

MODULE COMMUNICATIONS NETWORK

QUIESCENT CURRENT
CONTROL MODULE (G1561112)

R E M O V A L A N D I N S TA L L AT I O N

REMOVAL

NOTES:

Removal steps in this procedure may contain installation details.

Some variation in the illustrations may occur, but the essential

information is always correct.

1. Disconnect the battery ground cable.

Refer to: Specifications (414-00 Battery and Charging System -
General Information, Specifications).
2.
!

3.
!

Torque: 9 Nm

I N STA L L AT I O N
1. To install, reverse the removal procedure.

2. If a new component has been installed, configure using Land Rover

approved diagnostic equipment.
2016.0 RANGE ROVER (LG), 418-00

MODULE COMMUNICATIONS NETWORK

BODY CONTROL
MODULE/GATEWAY MODULE
ASSEMBLY (G1937918)

R E M O V A L A N D I N S TA L L AT I O N

REMOVAL

NOTES:

Removal steps in this procedure may contain installation details.

Some components shown removed for clarity.

Some variation in the illustrations may occur, but the essential

information is always correct.

1. Refer to: Specifications (414-00 Battery and Charging System -

General Information, Specifications).

2. Refer to: Central Junction Box (418-00 Module Communications

Network, Removal and Installation).
3.
!
4.
!

Torque: 10 Nm

I N STA L L AT I O N

1. To install, reverse the removal procedure.

2. If a new component is to be installed, configure using Land Rover

approved diagnostic equipment.