Instrument Pack CAN Messages

Description

Instrument Pack CAN Messages
The instrument pack acts as a CAN gateway to other CAN controlled functions on the vehicle. The following table lists signals which are routed through the gateway and translated to or from CAN as applicable.





CAN Inputs
The following CAN inputs are received by the instrument pack:





^ Electronic Brake Distribution (EBD): This signal represents the electronic brake proportioning status. This signal is used to indicate a fault with either the brake proportioning system or low brake lamp fluid and illuminate the brake system warning lamp. The signal is originated from the ABS ECU.
^ ABS Lamp Status: This signal is used to illuminate the ABS warning lamp when an ABS fault occurs. The ABS system will illuminate the lamp when the engine is not running and extinguish it when the engine starts. Further illumination indicates an ABS fault. The signal is originated from the ABS ECU.
^ Traction Control (TC) Lamp Status: This signal is used to illuminate the TC warning lamp for a bulb check when the ignition is first switched on and also for when TC is active. The signal is also used to illuminate the TC warning lamp when the ABS ECU detects a fault in the brake system for traction control. The signals are originated from the ABS ECU.
^ Vehicle Speed: This signal is used to operate the speedometer and the odometer and trip functions. The signal is originated from the ABS ECU.
^ HDC Activity Status: This signal is used to illuminate the HDC active lamp. The signal informs the instrument pack if the HDC function is enabled or disabled. If the HDC function is disabled, the HDC lamp will flash to indicate that the incorrect gear is selected or the vehicle is travelling at excessive speed for HDC operation. The signal is originated from the ABS ECU.
^ HDC Fault Status: This signal is used to illuminate the HDC fault lamp. The signal is a combination of the HDC activity and fault messages and is only illuminated when the ABS system detects a HDC function fault. The signal is originated from the ABS ECU.
^ Engine Speed: This signal is used to operate the tachometer. The signal is unfiltered with any damping performed by the instrument pack. The ECM also issues an engine speed error signal which is ignored by the instrument pack. Both signals are also used by the EAT ECU to assist shift timing and fluid pressure calculations and by the ABS ECU for traction control. The signal is originated from the ECM.
^ Engine Coolant Temperature: This signal is used to operate the coolant temperature gauge. The signal is unfiltered with any damping performed by the instrument pack. The signal is also used by the EAT ECU for warm up cycle detection. The signal is originated from the ECM.
^ Glow Plug Lamp Status (Diesel Models Only): This signal is used to illuminate the glow plug warning lamp. The signal is originated from the Electronic Diesel Control (EDC) ECM, which controls the time period for illumination dependent on engine coolant temperature.
^ Engine MIL Status (Service Engine Soon): This signal is used to illuminate the MIL. The signal is originated from the ECM if an OBD related engine management fault occurs or on KV6 vehicles from the EAT ECU, via the ECM, if an OBD related gearbox fault occurs. The signal is also used by the EAT ECU to disable OBD fault monitoring in the event of an ECM fault.
^ Cruise Main Switch (Diesel Only): This signal is used to illuminate the cruise control active warning lamp. The signal is generated when the cruise control switch is selected on. The signal from the switch is received by the cruise control interface unit. When the interface unit also receives a cruise active signal, it produces a hardwired signal to the instrument pack to illuminate the cruise control warning lamp.
^ Engine Status: This signal is used to illuminate the engine malfunction (service engine) lamp. This lamp is illuminated for non OBD related faults which would not illuminate the MIL. The signal is originated from the ECM.
^ Fuel Consumption: This signal is used to calculate the service interval announcement in the LCD. The signal is the sum of the volume of injected fuel, calculated from the injection periods minus the valve delay times, and the pitch of the corresponding injector. The injected volumes are calculated as they occur and transmitted on the CAN every 10 ms for petrol engines and every 20 ms for diesel engines. The signal is originated from the ECM.
^ Target Gear (Automatic Gearbox Only): This signal is used in conjunction with the selector position signal to display the current gear selection in the LCD. The signal is the actual gear or target gear if gearbox is changing ratios. The signal is also used by the ECM to assist in engine load change prediction. The signal is originated from the EAT ECU.
^ Selector Position (Automatic Gearbox Only): This signal is used in conjunction with the target gear signal to display the current gear selection in the LCD. The signal represents the actual selected gear position. The signal is also used by the ECM to assist in idle speed control. The signal is originated from the ECM.
^ Gear Shift Mode (Automatic Gearbox Only): This signal is used to display the currently selected gearshift mode; drive, sport or manual in the LCD. The signal is originated from the EAT ECU.
^ Gearbox Fault Status (Automatic Gearbox Only): This signal is used to display the status of the EAT ECU. If a gearbox fault occurs the EAT ECU will generate this message to alternately display 'F' and '4' in the LCD and initiate the default strategy for gearbox control.