Part 2

Instrument Cluster

Adaptive Front Lighting System Indicator
The Adaptive Front lighting System (AFS) indicator is controlled by the AFS module. The AFS module is hardwired to the CJB, which relays signals to the instrument cluster over the medium speed CAN bus. When the vehicle enters power mode 6, the AFS indicator is illuminated in an amber color for a 3 second bulb check. If during AFS operation a fault is detected, the AFS indicator will flash at a frequency of 2 Hz.

Speed Control Indicator
The speed control indicator is controlled by the ECM, which transmits a speed control active signal to the instrument cluster via the CJB. The indicator will illuminate in an amber color when the vehicle is in power mode 6 and speed control is active.

Trailer Indicator
The trailer indicator is controlled by the instrument cluster on receipt of medium speed CAN bus signals from the CJB. When a trailer is connected to the vehicle electrical system and the turn signal indicator switch is operated, the CJB transmits a signal to the instrument cluster to operate the trailer indicator. The instrument cluster software controls the flash rate of the indicator which flashes in a green color. The trailer indicator flashes slowly, at the same rate as the turn signal indicators.

Low Washer Fluid Indicator
The low washer fluid indicator is illuminated on receipt of a medium speed CAN bus signal from the CJB. The signal originates in the low washer fluid level switch, which is hardwired to the CJB.
The amber low washer fluid indicator is subject to a 3 second bulb check when the vehicle enters power mode 6. If a low washer fluid level is detected for more than 15 seconds when the vehicle is in power mode 6, the instrument cluster will illuminate the indicator.

Low Engine Coolant Level Warning Indicator
The low engine coolant level warning indicator is illuminated on receipt of a medium speed CAN bus signal from the CJB when the vehicle is in power mode 6. The signal originates in the ECM, which transmits the signal to the CJB over the high speed CAN bus.
When the vehicle enters power mode 6, the amber low engine coolant level warning indicator is illuminated for a 3 second bulb check. If the warning indicator remains illuminated after this period, the engine cooling system should be checked for leaks and topped up as necessary.

Transmission Warning Indicator
The transmission warning indicator displays automatic transmission and active-on demand coupling warnings. The warning indicator is illuminated on receipt of medium speed CAN bus signals from the CJB. The signals originate in the Transmission Control Module (TCM) and the active-on demand coupling control module respectively and are transmitted to the CJB over the high speed CAN bus.
The transmission warning indicator is a dual color indicator, which is subject to a 3 second bulb check when the vehicle enters power mode 6. For the first 1.5 seconds of the bulb check the indicator illuminates in an amber color, followed by 1.5 seconds illuminated in a red color.
The table below details warning indicator color against message center message.





Hill Descent Control Fault Warning Indicator
The amber Hill Descent Control (HDC) warning indicator is illuminated on receipt of medium speed CAN bus signals from the CJB. The signals originate in the ABS module and are transmitted to the CJB over the high speed CAN bus.
When the vehicle enters power mode 6, the HDC warning indicator is subject to a 3 second bulb check. If during HDC operation the HDC warning indicator illuminates it signifies that the 'fade out' strategy has been invoked due to component failure.
If the HDC warning indicator flashes it signifies that the 'fade out' strategy has been invoked due to brake system overheat. In this instance, the first flash is accompanied by a chime from the instrument cluster and the green HDC active indicator will be extinguished. For additional information, refer to Anti-Lock Control - Stability Assist Anti-Lock Control - Stability Assist

Door Open Indicator
The door open indicator is illuminated on receipt of medium speed CAN bus signals from the CJB. The signals originate in the door modules, which are hardwired to the CJB. The door open indicator will illuminate in a red color if a door open signal is received by the CJB from any door module while the vehicle is in power mode 6.

Engine Management System Warning Indicator
The engine management system warning indicator is illuminated on receipt of medium speed CAN bus signals from the CJB. The signals originate in the ECM and are transmitted to the CJB over the high speed CAN bus.
The amber engine management system warning indicator is illuminated for a 3 second bulb check when the vehicle enters power mode 6. If the indicator subsequently illuminates a DTC will be logged in the ECM which should be interrogated using the Land Rover approved diagnostic system.

Side Lamp Indicator
The green side light indicator is illuminated on receipt of a medium speed CAN bus signal from the CJB. The signal originates in the light switch module and is transmitted to the CJB over the Local Interconnect Network (LIN) bus. The instrument cluster will only illuminate the side lamp indicator when the vehicle is in power mode 6.

Dynamic Stability Control Indicator
The Dynamic Stability Control (DSC) indicator is illuminated by the instrument cluster on receipt of medium speed CAN bus signals from the CJB. The signal originates in the ABS module. The indicator is illuminated in an amber color for 3 seconds for a bulb check when the vehicle enters power mode 6. If no faults exist, the indicator is extinguished after the bulb check period.
When DSC is active, the indicator flashes to inform the driver that the system is regulating engine output and braking forces. If the indicator remains illuminated after the bulb check period or illuminates when driving, the DSC system has a fault or DSC has been deselected by the driver using the DSC switch on the floor console.

Hill Descent Control Active Indicator
The HDC active indicator is illuminated by the instrument cluster on receipt of medium speed CAN bus signals from the CJB. The signal originates in the ABS module. The indicator is illuminated in a green color when HDC is active and the vehicle speed is below a predetermined threshold. If the vehicle speed is faster than the threshold limit, the HDC indicator will flash until the vehicle speed is reduced. On high line instrument clusters a supporting message will also be displayed in the message center. For additional information, refer to Anti-Lock Control - Stability Assist Anti-Lock Control - Stability Assist
For additional information, refer to Information and Message Center Description and Operation
If the use of HDC causes the brake discs to exceed their pre-determined temperature, the HDC system initiates a 'fade out'. The HDC indicator flashes during 'fade out' and on high line instrument clusters a supporting message is displayed in the message center. When the brake discs have cooled sufficiently, HDC is reactivated and the HDC indicator is permanently illuminated.

Anti-theft Alarm Indicator
The anti-theft alarm indicator is controlled directly from the CJB via a hardwired connection. There is no software functionality within the instrument cluster to control operation of the anti-theft alarm indicator. For additional information, refer to Anti-Theft - Active Anti-Theft - Active

Glow Plug Indicator
The glow plug indicator is illuminated on receipt of a medium speed CAN bus signal from the CJB. The signal originates in the diesel ECM and indicates the glow plugs are operational. The indicator will illuminate in an amber color when the vehicle enters power mode 6 and a glow plugs active signal is received from the ECM. When the combustion pre-heat procedure has been carried out, the ECM informs the instrument cluster to extinguish the glow plug indicator. For additional information, refer to Electronic Engine Controls

Overspeed Warning Indicator
The amber overspeed warning indicator is illuminated on receipt of a medium speed CAN bus signal from the CJB when the vehicle is in power mode 6. The vehicle speed signal originates in the ABS module and is the same as that used by the speedometer (see above).
The instrument cluster will flash the overspeed warning indicator at a rate of 2 Hz for 5 seconds if a speed of greater than 75 mph (120 kph) is reached. The first flash of the indicator will be accompanied by a chime from the instrument cluster. If the vehicle stays at this speed, the indicator will remain illuminated after the 5 second flashing period. The instrument cluster will extinguish the indicator if vehicle speed drops below 71 mph (114 kph).

Stop/Start Vehicles - From 2010 MY





Eco 'Stop/Start' Indicator
The TD4_e introduces the first intelligent 'Stop/Start' system into a Land Rover vehicle. The system automatically shuts down and restarts the vehicle's engine when the appropriate conditions are satisfied. This reduces the amount of time the engine spends idling, thereby improving fuel economy and reducing emissions. The driver will be notified that the engine is shutdown by the 'Eco' icon being illuminated in the instrument cluster. Other warning lights normally associated with an engine shutdown, for example the ignition and low oil pressure indicators are suppressed so will not illuminate during an engine shutdown in a Stop/Start cycle. For additional information, refer to Starting System






Eco Switch
The Stop/Start system is automatically activated each time an ignition cycle occurs. However, the driver can deactivate the system by pressing the 'Eco' switch in the fascia. For additional information, refer to Starting System
The Eco switch also operates the Gear Shift Indicator; for additional information refer to Gear Shift Indicator section, below.

CAR CONFIGURATION FILE
The car configuration file contains all relevant data about the specification and market condition of the vehicle, immobilization codes and driver personal settings. The master repository for this information is the CJB, with a back up being held in the instrument cluster. The information is continuously transferred between the 2 components to ensure the data is constantly backed-up.

CAUTION: When a new instrument cluster is to be installed, the Land Rover approved diagnostic system must be connected to the vehicle and the instrument cluster renewal procedure followed. This will ensure that vehicle coding data is correctly installed in the new instrument cluster. The Land Rover approved diagnostic system will also record the current service interval data and restore the settings in the new instrument cluster.
When a new instrument cluster is installed, the Land Rover approved diagnostic system is used to transfer the car configuration file data from the CJB to the replacement instrument cluster. Vehicle coding data such as engine type and market is retrieved and used to update the replacement instrument cluster.
The car configuration file will also need to be updated using the Land Rover approved diagnostic system if the vehicle is modified in service from its original factory specification. This can include fitting non-standard wheels and/or tires, or optional accessory dealer fit components with an electrical interface.

GEAR SHIFT INDICATOR - FROM 2010 MY

OVERVIEW
A Gear Shift Indicator in the instrument cluster illuminates to advise the driver when to select a higher gear to attain better fuel efficiency from the vehicle. If the indicator is obeyed the driver can achieve fuel savings of up to 5%.





Gear shift indicator

Introduced in the manual transmission vehicle as standard, the Gear Shift Indicator is automatically activated each time an ignition cycle occurs. However, the driver can deactivate the indicator by pressing the 'Eco' switch on the fascia.

NOTE:
The 'Eco' switch also operates the Stop/Start system.
For additional information, refer to Starting System





Eco switch

The Gear Shift Indicator illuminates to advise the driver to select a higher gear, the indicator depending on driver action and driving conditions behaves as follows:
- Extinguishes when a higher gear is selected.
- Extinguishes before a higher gear is selected if driver demand or driving conditions change.
- Extinguishes after 12 seconds if the indicator is ignored; either of the two following conditions can reset the indicator:
- the driver makes a further gear selection,
- the driver accelerates after exiting a sharp corner.
The Gear Shift Indicator is designed only to assist the driver, gear selection remains the driver's decision based on other driving conditions affecting the vehicle.
The Gear Shift Indicator:
- Does not advise when to select a lower gear.
- Cannot predict the gradient or curvature of the road ahead.

CONTROL DIAGRAM

Gear Shift Indicator Control Diagram

NOTE:
A = Hardwired; D = High Speed CAN bus; N = Medium Speed CAN bus.









PRINCIPLES OF OPERATION
The Gear Shift Indicator takes advantage of the fully mapped engine to continually calculate the engines performance and whether a higher gear would provide improved fuel efficiency. The ECM (engine control module) interprets which gear is currently selected from analysis of the following EEC (electronic engine control) component inputs:
- Engine load; input from the MAF (mass air flow) sensor.
- Driver's accelerator position and demand; input from the APP (accelerator pedal position) sensor.
- Engine temperature; input from the coolant temperature sensor.
- Engine speed; input from the CKP (crankshaft position) sensor.
- Vehicle speed; input from the ECM via signals from the ABS (anti-lock brake system) module on the high-speed CAN (controller area network).
Using these inputs the ECM uses an algorithm to monitor the driver's torque and performance demand in the current gear to establish if the same torque and performance could be achieved in the next highest gear to improve fuel efficiency, without introducing engine laboring.
The signal from the Steering Angle Sensor is used to inhibit illumination of the Gear Shift Indicator when the vehicle is traveling round a bend in the road.





Linear clutch sensor

The linear clutch sensor a component introduced with the Stop/Start system is used to reset the indicator lamp each time a gear change is executed. For additional information, refer to Starting System
The two existing clutch position-switches located on the clutch pedal housing and used as inputs for various vehicle systems, are also used by the Gear Shift Indicator system for plausibility checks.

NOTE:
The Gear Shift Indicator will not function if there is fault with the Stop/Start system.
For additional information, refer to Starting System