Warning Indicators - Part 2
13. Tire Pressure Monitoring System (TPMS) Indicator
The Tire Pressure Monitoring System (TPMS) indicator is controlled by the instrument cluster software on receipt of CAN signals from the TPMS module. The indicator is illuminated in an amber color for a 3 second bulb check by the TPMS module when the ignition is moved to position II. If the indicator remains illuminated after the engine is started or illuminates when driving, the TPMS has developed a fault. The tire pressures should be monitored manually until the fault is rectified.
14. Safety Belt Warning Indicator
The safety belt warning indicator is controlled by the restraints control module and the instrument cluster software on receipt of CAN signals from the restraints control module.
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 vehicles with a high line instrument cluster, the indicator warning illumination will be accompanied by a message in the message center.
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.
15 and 38. Brake Warning Indicator
This indicator is controlled by CAN signals from the ABS module for Electronic Brake Assist (EBA) and Electronic Brake Distribution (EBD) faults. Brake pad wear or low brake fluid indications are controlled by the instrument cluster with the pad wear sensors and the fluid level sensor hard wired into the instrument cluster. The indicator can be illuminated in an amber or red colour depending on the fault.
The indicator is illuminated for a bulb check when the ignition is switched on. The indicator is illuminated in an amber colour for 1.5 seconds and red colour for a further 1.5 seconds. If no faults exist, the indicator is extinguished after the bulb check period.
The brake warning indicator functions are assigned priority. Fault conditions which require a red illumination have priority over amber illuminated faults.
Brake Pad Wear
^ The front left hand inboard brake pad and the rear right hand inboard brake pad are fitted with wear sensors. The pads are wired in series to the instrument cluster which continuously monitors the circuit. When one or both pads wear to their allowed limit (approximately 75% worn) the sensor circuit is broken and is detected by the instrument cluster software. The instrument cluster illuminates the brake warning indicator in a red colour and on high line instrument cluster a message 'PAD WEAR' is displayed in the message center. When the pad(s) are replaced, the instrument cluster senses the completed circuit and withdraws the indicator illumination and message display (if applicable) when the ignition is switched on to position II.
EBA/EBD Warning
^ If a failure of the EBA or EBD functions occur, the ABS module transmits a CAN signal which is received by the instrument cluster. The instrument cluster software illuminates the brake warning indicator in an amber color for minor EBA/EBD faults and in a red color for major EBA/EBD faults. The indicator will remain illuminated for as long as the fault exists.
Low Brake Fluid
^ The brake fluid reservoir is fitted with a sensor which is connected directly to the instrument cluster. When the ignition is switched on to position II the fluid level is checked. To prevent incorrect warnings when the vehicle is moving, the sensor is monitored once every 25 seconds. If a low fluid situation occurs, the instrument cluster illuminates the brake warning indicator in a red color and on high line instrument clusters also displays the message 'CHECK BRAKE FLUID' in the message center. Illumination of the indicator for low fluid level is also accompanied by a chime from the instrument cluster.
16. Anti-lock Brake System (ABS) Indicator
The ABS indicator is controlled by the ABS module which transmits a CAN signal to the instrument cluster. The indicator is illuminated in an amber color for 3 seconds for a bulb check by the ABS module when the ignition is moved to position II. If the indicator remains illuminated or illuminates when driving, an ABS fault has occurred an the ABS function will not be available.
During the bulb check, if the indicator comes on for 0.5 second, then goes off for 0.5 second and is then illuminated for the remaining 2 seconds of the bulb check, this indicates that faults are stored in the ABS module memory.
If the indicator was illuminated due to a sensor fault, the indicator will remain illuminated at the next ignition cycle, even if the fault is rectified. When the vehicle is driven above a speed of 20 km/h (12.5 mph) the indicator will be extinguished. This allows the ABS module to perform a thorough check of the system and to establish that the output from the replaced sensor is correct.
17. Cruise Control Indicator
The cruise control indicator is controlled by the ECM and the instrument cluster on receipt of CAN signals from the ECM. When the cruise control is selected on, the indicator is illuminated providing that cruise has been resumed and is not within 8 km/h (5 mph) of the set speed or cruise is on and the vehicle speed is within 8 km/h (5 mph).
18. Adaptive Front Lighting System (AFS) Indicator
The AFS indicator is controlled by the AFS control module and the instrument cluster software on receipt of CAN signals from the control module. The indicator is illuminated in an amber color for a 3 second bulb check when the ignition is moved to position II.
The AFS indicator displays AFS system failures to the driver. If a failure occurs, the indicator will illuminate continuously until the fault is rectified.
19 and 36. Park Brake Fault Indicator
The park brake fault indicator is controlled by the instrument cluster software on receipt of CAN signals from the Electronic Park Brake (EPB) control module. The indicator is illuminated in an amber color for 3 second for a bulb check when the ignition is moved to position II. If a fault occurs in the EPB system occurs, the EPB control module requests illumination of the indicator which remains illuminated until the fault is rectified.
20 and 37. Park Brake Warning Indicator
The park brake warning indicator is controlled by the instrument cluster software on receipt of CAN signals from the Electronic Park Brake (EPB) 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.
21. Front Fog Lamps Indicator
The front fog lamp indicator is controlled by the CJB which transmits CAN signals to the instrument cluster. The lamp is illuminated in a green color at all times when the front fog lamps are selected on and the ignition is in position II.
22. Rear Fog Lamps Indicator
The rear fog lamp indicator is controlled by the CJB which transmits CAN signals to the instrument cluster. The lamp is illuminated in an amber color at all times when the rear fog lamps are selected on and the ignition is in position II.
23. Trailer Indicator
The trailer indicator is controlled by the instrument cluster software on receipt of CAN signals on the medium speed CAN bus from the Central Junction Box (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, accompanied simultaneously by a sound from the instrument cluster sounder, at the same rate as the turn signal indicators.
24. Auxiliary Heating Indicator
The auxiliary heating indicator is controlled by the Automatic Temperature Control (ATC) module and the instrument cluster software. The Fuel Burning Heater (FBH) is controlled by the ATC module and is switched on at a preset time by a driver set time in the instrument cluster software. The indicator is illuminated in an amber color for a 3 seconds bulb check when the ignition is moved to position II. The indicator will remain illuminated at all times when the FBH is active.
25. Engine Management System (EMS) Fault Indicator
The EMS fault indicator is only available on low line instrument clusters. The indicator is controlled by the ECM and the instrument cluster software on receipt of CAN signals from the ECM. The indicator is illuminated in an amber color for bulb check when the ignition is moved to position II. The lamp is extinguished when the engine starts. Engine management faults which do not affect emissions will permanently illuminate the EMS fault indicator. The indicator will only extinguish when the fault has been rectified.
Reduced engine performance or limp home operation is also signalled to the driver by the EMS fault indicator.
26. Driveline Fault Indicator
The Driveline fault indicator is controlled by transfer box control module, rear differential control module and the transmission control module and the instrument cluster software. The indicator is illuminated by the instrument cluster on receipt of a CAN signal of either of the controlling modules. The instrument cluster interprets the signals and can illuminate the indicator in either an amber or red colour as appropriate for faults relating to either the transfer box, rear differential or the automatic transmission. Amber illumination signifies a minor fault which should be rectified when convenient, Red illumination signifies a major fault which should be rectified at the earliest opportunity.
27. Hill Descent Control (HDC) Fault Indicator
The HDC fault indicator is only available on low line instrument clusters; on high line instrument cluster fault information is displayed by appropriate messages in the message center. The HDC fault indicator is illuminated by the instrument cluster software on receipt of CAN signals from the ABS module. The indicator is illuminated in an amber color when a HDC fault is present. The indicator is illuminated in an amber color for a 3 second bulb check when the ignition is moved to position II. If a fault occurs in the HDC system, the amber indicator is illuminated
During the bulb check, if the indicator comes on for 0.5 second, then goes off for 0.5 second and is then illuminated for the remaining 2 seconds of the bulb check, this indicates that faults are stored in the ABS module memory.
If the indicator was illuminated due to a sensor fault, the indicator will remain illuminated at the next ignition cycle, even if the fault is rectified. When the vehicle is driven above a speed of 20 km/h (12.5 mph) the indicator will be extinguished. This allows the ABS module to perform a thorough check of the system and to establish that the output from the replaced sensor is correct.
If the use of HDC causes the brake discs to exceed their pre-determined temperature, the HDC system initiates a 'fade out'. The HDC fault indicator flashes during 'fade out'. When the brake discs have cooled sufficiently, HDC is reactivated and the HDC fault indicator is extinguished.
28. Water In Fuel Indicator
This indicator is non-functional.
29. Driveline Overheat Indicator
The driveline overheat indicator is controlled by the instrument cluster software on receipt of CAN signals from the transfer box control module, rear differential control module or the transmission control module for the automatic transmission. The indicator is illuminated in an amber color for a 3 second bulb check when the ignition is moved to position II. When one or more of the control modules sense that the controlled component has reached its over temperature threshold, the applicable control module(s) transmits a CAN signal to the instrument cluster which illuminates the indicator for as long as the over temperature condition exists.
30. Low Washer Fluid Indicator
The low washer fluid indicator is only available on low line instrument clusters; on high line instrument cluster the level information is displayed by appropriate messages in the message center. The low washer fluid indicator is controlled by the instrument cluster. The washer fluid level sensor is hardwired into the instrument cluster which monitors the sensor output. The indicator is illuminated in an amber color for 3 seconds when the ignition is moved to position II. When the fluid in the washer reservoir falls to a predetermined level, the instrument cluster senses the signals from the sensor and illuminates the indicator and emits a single warning chime to alert the driver. The instrument cluster monitors the level sensor signals every 15 seconds to prevent incorrect warnings occurring due to fluid movement. When the reservoir is replenished the indicator is extinguished.
31. Door Open Indicator
The door open indicator is controlled by the instrument cluster on receipt of CAN signals from the Central Junction Box (CJB). The indicator is illuminated in a red color if any of the front or rear passenger doors, the driver's door, the bonnet or the tail gate are left open with the ignition switch in position II.
32. Park Brake City Mode
Indicator This indicator is non-functional.
33. Tire Pressure Warning Indicator
The tire pressure warning indicator is only available on low instrument cluster, high line instrument clusters display warning messages in the message center. The Tire Pressure Monitoring System (TPMS) indicator is controlled by the instrument cluster software on receipt of CAN signals from the TPMS module. The indicator is illuminated in a red color for a 3 second bulb check by the TPMS module when the ignition is moved to position II.
If the indicator remains illuminated after the engine is started or illuminates when driving, the vehicle should be stopped at the earliest opportunity and the tire pressures checked.
34. Low Coolant Indicator
The low coolant indicator is controlled by the instrument cluster. The coolant level sensor is hardwired into the instrument cluster which monitors the sensor output. The indicator is illuminated in an amber color for 3 seconds when the ignition is moved to position II. When the coolant in the header tank falls to a predetermined level, the instrument cluster senses the signals from the low coolant sensor. The instrument cluster flashes the indicator for 5 seconds accompanied by an a chime and then illuminates the indicator. The indicator remains illuminated until the coolant level in the header tank is restored to its correct level. The instrument cluster monitors the level sensor signals every 15 seconds to prevent incorrect warnings due to fluid movement.
35. Overspeed Warning Indicator
The overspeed warning indicator is only available on low line instrument clusters; on high line instrument cluster the level information is displayed by appropriate messages in the message center. The overspeed warning indicator is controlled by the instrument cluster and the speed threshold is determined by the default setting. The instrument cluster receives vehicle speed information from the ABS module on the CAN. The instrument cluster software monitors the speed signal data and determines when the speed threshold has been exceeded. When an overspeed condition occurs, the indicator is illuminated permanently for as long as the overspeed condition occurs.
39. Adaptive Cruise Control (ACC) Indicator (if fitted)
The ACC indicator is controlled by the ACC module and the instrument cluster software. The indicator is illuminated when cruise control is active and another vehicle is detected by the radar system in front of the vehicle. The indicator is illuminated in an amber color to alert the driver that the ACC system is active and will automatically control the vehicle speed to maintain a set distance from the vehicle in front.