Part 2
Instrument Cluster
INSTRUMENT CLUSTER
INDICATOR ACTIVATION
The following indicators are illuminated directly by the instrument cluster logic or by other control modules connected to the instrument cluster. The following table shows the indicator functionality.
Refer to table earlier in the instrument description section for indicator color and bulb check applicability.
Part 1:
Part 2:
INDICATOR FUNCTIONALITY
Functionality for each indicator is described below. Some indicators, when illuminated, are accompanied by a chime from the sounder and a message in the instrument cluster message center.
Glow Plug (TDV8 models only)
The glow plug indicator is illuminated by the ECM (engine control module) and the instrument cluster software. The glow plug indicator illuminates in an amber color when the ignition is moved to position II. There is a bulb check function for this indicator.
The indicator is illuminated by signals from the ECM (engine control module) which equate to the time which the glow plugs are energized. When the glow plug heating time is complete, the indicator is extinguished.
The glow plug indicator also serves a second function for the Electronic Diesel Control (EDC) system. If a major EDC system fault occurs when the engine is running, the glow plug indicator will be illuminated permanently and a message generated in the message center. The driver must seek attention to the engine management system at a Land Rover dealer as soon as possible.
Dynamic Stability Control (DSC)
The DSC indicator is controlled by the ABS (anti-lock brake system) module and the instrument cluster software. The indicator illuminates briefly in an amber color when the ignition is moved to position II. If DSC is selected off, the indicator remains illuminated.
When DSC is active, the indicator flashes to inform the driver that the system is regulating engine output and braking forces. If the indicator lamp remains illuminated after the engine is started or illuminates when driving, the DSC system has a fault or DSC has been deselected using the instrument panel switch.
If the vehicle battery has been disconnected, the DSC will be deactivated and the indicator will remain illuminated at ignition on when the battery is reconnected. The DSC can be reactivated by driving the vehicle a short distance or by turning the steering fully from lock to lock with the engine running. Reactivation is indicated by the indicator lamp extinguishing.
Hill Descent Control (HDC)
The HDC indicator is controlled by the ABS (anti-lock brake system) module and the instrument cluster software. The indicator illuminates briefly in a green color when the ignition is moved to position II. The indicator is also illuminated when HDC is selected on and the vehicle speed is less than 20 mph (35 km/h).
If HDC is selected on and the vehicle speed is faster than the operating speed, the indicator will flash and a message 'HDC NOT AVAILABLE SPEED TOO HIGH' will be displayed in the message center.
If the use of HDC causes the brake discs to exceed their pre-determined temperature, the HDC initiates 'fade out'. The indicator flashes during 'fade out'. When the brake discs have cooled, HDC is reactivated, the indicator illuminates and the message is removed from the message center.
Supplemental Restraint System (SRS)
The SRS (supplemental restraint system) warning indicator is controlled by the RCM (restraints control module) and the instrument cluster software. The indicator illuminates briefly in a red color when the ignition is moved to position II. If a fault is detected in the SRS (supplemental restraint system), the RCM (restraints control module) illuminates the SRS (supplemental restraint system) warning indicator continuously.
Anti-lock Brake system (ABS)
The ABS (anti-lock brake system) warning indicator is controlled by the ABS (anti-lock brake system) module and the instrument cluster software. The indicator illuminates briefly in an amber color when the ignition is moved to position II. If the indicator remains illuminated or illuminates when driving, a fault with the ABS (anti-lock brake system) system has occurred.
If the vehicle battery has been disconnected, the ABS (anti-lock brake system) will be deactivated and the warning indicator will remain illuminated at ignition on when the battery is reconnected. The ABS (anti-lock brake system) can be reactivated by driving the vehicle a short distance or by turning the steering fully from lock to lock with the engine running. Reactivation is indicated by the warning indicator extinguishing.
General Brake Warning / Emergency Brake Assist Warning / Parking Brake Warning
This warning indicator displays a number of conditions to the driver as follows. The indicator can be illuminated in an amber or red color depending on the existing fault condition. The indicator is illuminated, flashing alternately between an amber and red color, for a brief period with the ignition in position II. If no fault conditions exist, the indicator is extinguished after the bulb check period.
The functions of the parking brake warning indicator are assigned in priority. Fault conditions which use a red illumination have priority over amber illuminated faults.
Brake Pad Wear
- The front brake pads are fitted with a wear indicator system. The front left hand and rear right hand pads are wired in series to the instrument cluster which continuously monitors the circuit. When one or both pads wear to their allowed limit, the indicator circuit is broken and detected by the instrument cluster software. The instrument cluster illuminates the general brake warning indicator in a red color. The instrument cluster simultaneously, transmits a message to the LCM (lighting control module) which displays 'CHECK BRAKE PADS' in the message center. When the brake pads are replaced, the instrument cluster withdraws the message and the warning indicator illumination when the ignition is in position II, the engine is not running and the vehicle is not moving for 30 seconds.
Electronic Brake Distribution (EBD) Warning
- If a failure of the EBD function occurs, the ABS (anti-lock brake system) module passes a message to the instrument cluster. The cluster software illuminates the general brake warning indicator in a red color for as as the fault condition exists.
Low Brake Fluid Warning
- The brake fluid reservoir is fitted with a sensor which reports the fluid level to the LCM (lighting control module). When the ignition is switched to position II, the LCM (lighting control module) checks the fluid level immediately. To prevent false warnings when the vehicle is moving, the LCM (lighting control module) then monitors the fluid level with a 25 second delay. If the LCM (lighting control module) detects a low brake fluid situation the LCM (lighting control module) displays 'CHECK BRAKE FLUID' in the message center. Simultaneously, a message is sent to the instrument cluster which evaluates the message via the cluster software and illuminates the general brake warning indicator in a red color, accompanied by an intermittent chime from the sounder.
Emergency Brake Assist Warning
- If a failure of the emergency brake assist function occurs, the ABS (anti-lock brake system) module issues a CAN (controller area network) bus message which is received by the instrument cluster. The instrument cluster illuminates the parking brake warning indicator in an amber color for as long as the failure message is present on the CAN (controller area network) bus.
Parking Brake
The park brake indicator is controlled by the instrument cluster software on receipt of CAN (controller area network) signals from the park brake control module. The indicator is illuminated in a red color when the park brake is applied. If the ignition is moved to the off position, the indicator remains illuminated for 3 minutes. If a fault occurs which prevents park brake application the indicator flashes and the park brake fault indicator is also illuminated.
Engine Oil Pressure
The indicator illuminates in a red color at all times with the ignition in position II and the engine not running. If the indicator remains illuminated when the engine is started or illuminates when driving, the engine oil pressure is low and the engine must be stopped immediately to prevent serious damage to the engine internal components. When the indicator illuminates with the engine running, the instrument cluster displays 'STOP! ENGINE OIL PRESS' in the message center.
Battery Charge Indicator
The battery charge indicator is controlled by the ECM (engine control module) and the instrument cluster software.
The battery charge indicator illuminates in a red color with the ignition in position II and the engine not running. If the indicator remains illuminated when the engine is started or illuminates when driving, the generator charge output has failed.
Rear Fog Lamp
The rear fog lamp operation is controlled by the LCM (lighting control module). The rear fog lamps can only be selected on when the ignition switch is in position II, the lighting control switch is in the side lamp or headlamp position and the front fog lamps are selected on. The rear fog lamp warning indicator illuminates when the rear fog lamps are active. The warning indicator is extinguished if the rear fog lamps are selected off, the front fog lamps are selected off, the lighting control switch is selected off or the ignition is switched off.
Front Fog Lamp
The front fog lamp operation is controlled by the LCM (lighting control module). The front fog lamps can only be selected on when the ignition switch is in position II and the lighting control switch is in the side lamp or headlamp position. The front fog lamp warning indicator illuminates when the front fog lamps are active. The warning indicator is extinguished if the front fog lamp is selected off, the lighting control switch is selected off or the ignition is switched off.
Side Lights On
Operation of the side lights on indicator is controlled by the LCM (lighting control module). Side lights on can be selected with the ignition switch in any position, including off. When selected, the green indicator lamp will illuminate in the cluster. When either headlamp main or dipped beam are selected, the side lights on indicator will remain illuminated.
NOTE: The side lights on indicator will also illuminate if 'Auto' lamps are selected.
Malfunction Indicator Lamp (MIL)
MIL (malfunction indicator lamp) operation is controlled by the ECM (engine control module) and the instrument cluster software. The indicator illuminates in an amber color at all times with the ignition in position II and the engine not running. When the engine is started, the MIL (malfunction indicator lamp) is extinguished, providing that no OBD (on-board diagnostic) related faults are active. If the MIL (malfunction indicator lamp) remains illuminated or illuminates when driving, a fault is present and must be investigated as soon as possible.
Speed Control
The speed control indicator is controlled by the ECM (engine control module) and the instrument cluster software. The speed control indicator is not illuminated as a bulb check when the ignition is in position II. The indicator illuminates to indicate to the driver that speed control has been selected on. The indicator does not inform the driver of the status of the speed control, i.e.; engaged or not engaged.
Seat Belt
The safety belt warning indicator control is dependant on market specification.
The indicator is illuminated in a red color when the ignition is moved to position II. The illumination will remain on until the safety belt buckle is latched in position. If the safety belt of an occupied front seat is not fastened, when the vehicle speed exceeds 8 km/h (5 mph) the indicator will flash and repetitive chime will emit for 10 seconds from the instrument cluster. This will be repeated every 30 seconds until the safety belt is fastened, the vehicle speed is reduced below 5 km/h (3 mph) or the ignition switch is moved to the off position.
On NAS vehicles, the indicator will remain permanently illuminated until the safety belt is fastened, the vehicle speed is reduced below 5 km/h (3 mph) or the ignition switch is moved to the off position.
Low Fuel Warning
The low fuel warning indicator, located in the fuel level gage, is illuminated in an amber color briefly with the ignition in position II.
The warning indicator is controlled by the instrument cluster software which measures the output signals from the fuel tank level sensors.
If the fuel tank volume falls to or below 16 liters for TDV8 and 12 liters for 4.4L V8/4.2L V8 SC, the instrument cluster illuminates the indicator to inform the driver of the low fuel level.
Adaptive Front Lighting System (AFS)
The AFS indicator is controlled by the AFS control module and the instrument cluster software on receipt of CAN (controller area network) bus signals from the control module.
The AFS indicator is illuminated in an amber color for a two second bulb check when the ignition switch is moved to position II.
The AFS indicator displays AFS system failures to the driver. If a failure occurs, the indicator will flash continuously until the fault is rectified.
Trailer
The trailer indicator is controlled by the instrument cluster software on receipt of CAN (controller area network) signals from the LCM (lighting control module).
When a trailer is connected to the vehicle and the turn signal indicator is operated, the LCM (lighting control module) transmits a signal to the instrument cluster to operate the trailer indicator.
The instrument cluster software controls the flash rate of the indicator which illuminates in a green color. The trailer indicator flashes slowly, accompanied simultaneously by a sound from the instrument cluster sounder, at the same rate as the turn signal indicators.
Tire Pressure Monitoring System (TPMS)
The TPMS indicator is controlled by the instrument cluster software on receipt of CAN (controller area network) bus signals from the TPMS module.
The indicator is illuminated in an amber color for a two to three second bulb check when the ignition switch is moved to position II.
If the TPMS module detects tire pressures are too low for the current vehicle speed, the amber indicator will be illuminated, supported by the text 'TIRE PRESSURE LOW FOR SPEED' displayed in the message center.
NOTE: The message 'TIRE PRESSURE LOW FOR SPEED' does not appear on North American specification vehicles.
If the indicator remains illuminated after the engine is started or illuminates when driving and the text 'TIRE MONITORING SYSTEM FAULT' appears in the message center, the TPMS has developed a fault. The tire pressures should be monitored manually until the fault is rectified.
INSTRUMENT CLUSTER CONTROL DIAGRAM - SHEET 1 OF 2
NOTE: A = Hardwired; B = K Bus; C = Diagnostic DS2 Bus; D = High speed CAN (controller area network) bus; N = Medium speed CAN (controller area network) bus
INSTRUMENT CLUSTER CONTROL DIAGRAM - SHEET 2 OF 2
NOTE: A = Hardwired; K = I Bus;
