Block Diagram
CAN abbreviations
| 15 | Ignition ON (terminal 15) | 30 | Battery positive (terminal 30) |
Block Diagram (Continued)
| 31 | Ground (terminal 31) |
Function Table
| Terminal | Description | Source | Destination |
|---|---|---|---|
| X1-1 | Ground (terminal 31) | Ground | IPC |
| X1-4 | Battery positive (terminal 30) | IPBEC | IPC |
| X1-5 X1-6 LSCAN | Immobiliser identification signal | IPC | CIM |
| X1-5 X1-6 LSCAN | Vehicle odometer information Oil service life information | IPC | ECM via CIM |
| X1-5 X1-6 LSCAN | Loudspeaker priority Type of signal Clock frequency Number of repetitions Make-to-break ratio | IPC | CIM |
| X1-5 X1-6 LSCAN | Airbag display in instrument, failure Seat occupied detection display, failure | IPC | SDM |
| X1-5 X1-6 LSCAN | Parking brake switch active | BCM | IPC |
| X1-5 X1-6 LSCAN | Rear left door status Rear right door status Driver's door status Passenger's door status Luggage compartment status | BCM | IPC |
| X1-5 X1-6 LSCAN | Interior illumination ON Interior illumination dimming | BCM | IPC |
| X1-5 X1-6 LSCAN | Display check for turn signal and hazard warning lights: Activation Display check for turn signal and hazard warning lights: Flashing period Display check for turn signal and hazard warning lights: Flashing make-to-break ratio | BCM | IPC |
| X1-5 X1-6 LSCAN | Brake fluid level low Brake lining wear display ON Coolant level low | BCM | IPC |
| X1-5 X1-6 LSCAN | Immobiliser identification signal | CIM | IPC |
| X1-5 X1-6 LSCAN | Ignition lock information | CIM | IPC |
| X1-5 X1-6 LSCAN | Engine running status Odometer Engine speed Vehicle speed | ECM | IPC via CIM |
| X1-5 X1-6 LSCAN | Fuel level Oil service life information | ECM | IPC via CIM |
| X1-5 X1-6 LSCAN | Diesel glow plug display ON Low engine oil level display ON "Change engine oil" display ON "Change engine oil soon" display ON Low engine oil pressure display ON Engine coolant temperature Charging telltale display ON Cruise control active | ECM | IPC via CIM |
| X1-5 X1-6 LSCAN | Automatic transmission gear display | TCM | IPC via CIM |
| X1-5 X1-6 LSCAN | Transmission winter mode display ON | TCM | IPC via CIM |
| X1-5 X1-6 LSCAN | Power steering display ON | EHPS | IPC via CIM |
| X1-5 X1-6 LSCAN | Headlamp range control display ON | AHL | IPC via CIM |
| X1-5 X1-6 LSCAN | Anti-lock brake system display ON Traction control fault Electronic stabilisation programme fault Display check for traction control: display ON Display check for traction control: display period Display check for traction control: display make-to-break ratio | ABS | IPC via CIM |
| X1-5 X1-6 LSCAN | Park pilot defective display ON Park pilot malfunction display ON | PAS | IPC |
| X1-5 X1-6 LSCAN | Brake light bulb, left defective Brake light bulb, right defective Reversing lamp bulb, left defective Reversing lamp bulb, right defective Rear lamp bulb, left defective Rear lamp bulb, right defective Centre brake light bulb, upper defective Fog lamp bulb, rear left defective Fog lamp bulb, rear right defective Trailer brake light defective Trailer fog lamp defective Trailer reversing lamp defective Trailer rear lamp defective | REC | IPC |
| X1-5 X1-6 LSCAN | Trailer switch active Rear fog lamp display ON | REC | IPC |
| X1-5 X1-6 LSCAN | Airbag display ON Seat belt display ON Seat occupied detection display ON | SDM | IPC |
| X1-5 X1-6 LSCAN | Fog lamp bulb, front left defective Fog lamp bulb, front right defective High beam bulb, left defective High beam bulb, right defective Low beam bulb, left defective Low beam bulb, right defective Parking light bulb, left defective Parking light bulb, right defective | UEC | IPC |
| X1-5 X1-6 LSCAN | High beam display ON Front fog lamp display ON Parking light, left display ON Parking light, right display ON | UEC | IPC |
| X1-5 X1-6 LSCAN | Time Reset status Calendar – day/month/year | DIS | IPC |
| X1-8 | Terminal 58D, dimmed illumination | BCM | IPC |
| X1-11 | Ignition ON (terminal 15) | IPBEC | IPC |
| X1-12 | Direct actuation for engine malfunction telltale (MIL) | ECM | IPC |
Functional Description
The IPC comprises the following functions:
- Vehicle speed display
- Engine speed display
- Total mileage odometer
- Trip odometer
- Configurable information display
- Automatic transmission display
- Fuel level display
- Engine temperature display
- Display lamps
- CAN interface
Speedometer Function
The ECM transmits the current vehicle speed signal to the IPC. This message is sent via the HSCAN from the ECM to the CIM interface and via the LSCAN to the IPC. The IPC actuates the speedometer stepper motor using this information.
Tachometer Function
The ECM transmits the current engine speed signal as well as the "engine running" signal to the IPC. This message is sent via the HSCAN from the ECM to the CIM interface and via the LSCAN to the IPC. The IPC actuates the tachometer stepper motor using this information.
Odometer Function
- Total mileage odometer
The ECM transmits odometer information to the IPC. This message is sent via the HSCAN from the ECM to the CIM interface and via the LSCAN to the IPC. The IPC calculates the new mileage value from the difference between two odometer messages and the current mileage value. This information then appears in the total mileage odometer display area.
- Trip odometer
The trip odometer functions similarly to the total mileage odometer but can be reset via the reset button. The symbols for seat occupied detection are also located in the trip odometer display area.
Fuel Level Display Function
The ECM transmits the current fuel level as a percentage to the IPC. This message is sent via the HSCAN from the ECM to the CIM interface and via the LSCAN to the IPC. The IPC actuates the fuel gauge stepper motor using this information.
Coolant Temperature Display Function
The ECM transmits the current coolant temperature to the IPC. This message is sent via the HSCAN from the ECM to the CIM interface and via the LSCAN to the IPC. The IPC actuates the coolant temperature display stepper motor using this information.
Speed Warning Function (Country-Specific)
If the speedometer exceeds a specified speed value, the IPC transmits an acoustic warning signal request to the CIM via the LSCAN. If the speedometer then falls below this threshold, the acoustic warning signal is switched off.
Information Display Function
Two versions of the configurable information display are installed; one for vehicles with AT and one for vehicles without AT. The AT version includes an additional block with automatic transmission information.
Configurable Dot Matrix Display
Immobiliser Display
The CIM transmits the message "Immobiliser identification" to the IPC. Upon receipt of this message, the IPC checks whether the conditions are fulfilled and the immobiliser pictogram is shown on the display.
Ehps Display
The EHPS transmits the message "Power steering display ON" to the IPC. This message is sent via the HSCAN from the EHPS to the CIM interface and via the LSCAN to the IPC. Upon receipt of this message, the IPC shows the EHPS pictogram on the display.
Service Telltale Display (Svs)
Upon receipt of the message "Service telltale ON", the IPC actuates the appropriate pictogram on the display.
Tpms Fault and Tpms Status Display
The TPMS transmits the message "Tyre pressure status, front left/front right/rear left/rear right" to the IPC. Upon receipt of this message, the IPC shows the tyre pressure status pictogram on the display. In addition, the TPMS can also transmit a TPMS fault to the IPC with the message "TPMS system fault". Upon receipt of this message, the IPC shows the TPMS fault pictogram on the display.
Coolant Level Display
The BCM transmits the message "Coolant level too low" to the IPC via the LSCAN. Upon receipt of this message, the IPC shows the coolant level pictogram on the display.
Headlamp Range Control Display
The AHL transmits the message "Headlamp range control fault display ON" to the IPC. This message is sent via the HSCAN from the AHL to the CIM interface and via the LSCAN to the IPC. Upon receipt of this message, the IPC shows the headlamp range control pictogram on the display.
Park Pilot Fault Display
The PAS transmits the message "Park pilot fault" to the IPC via the LSCAN. Upon receipt of this message, the IPC shows the park pilot pictogram on the display.
Airbag Telltale Failure Display
See airbag display lamps / telltales function
Luggage Compartment Status Display
The BCM transmits the message "Luggage compartment status" to the IPC via the LSCAN. Upon receipt of this message, the IPC shows the open luggage compartment pictogram on the display.
Door Status Display
The BCM transmits the 4 messages "Driver's door, passenger's door, rear right door and rear left door open or half open" to the IPC via the LSCAN. Upon receipt of at least one of these 4 messages, the IPC shows the "Door open" pictogram on the display.
Bulb Failure Display
The UEC and REC transmit all messages in conjunction with bulb failure in the exterior lighting to the IPC via the LSCAN. Upon receipt of at least one of these messages, the IPC shows the bulb failure pictogram on the display.
The UEC Transmits the Following Conditions:
- Front fog lamp, left failure
- Front fog lamp, right failure
- Main beam, left failure
- Main beam, right failure
- Low beam, left failure
- Low beam, right failure
- Parking light, front left failure
- Parking light, front right failure
The REC Transmits the Following Conditions:
- Rear lamp, left failure
- Rear lamp, right failure
- Brake light, left failure
- Brake light, right failure
- Brake light, centre failure
- Reversing lamp, left failure
- Reversing lamp, right failure
- Rear fog lamp, left failure
- Rear fog lamp, right failure
- Brake light, trailer failure
- Rear fog lamp, trailer failure
- Reversing lamp, trailer failure
- Rear lamp, trailer failure
Brake Lining Display
The BCM transmits the message "Brake linings worn display" to the IPC. Upon receipt of this message, the IPC shows the worn brake linings pictogram on the display.
Transmission Driving Stage Display (At)
The TCM transmits the message "Display driving stage" to the IPC. This message is sent via the HSCAN from the TCM to the CIM interface and via the LSCAN to the IPC. Upon receipt of this message, the IPC shows the current driving stage pictogram on the display.
Transmission Winter Mode
The TCM transmits the message "Transmission winter mode display ON" to the IPC. This message is sent via the HSCAN from the TCM to the CIM interface and via the LSCAN to the IPC. Upon receipt of this message, the IPC shows the transmission winter mode pictogram on the display.
Display Lamps Function
Service Interval Display
The IPC comprises a service interval display, which can be triggered by two thresholds: Time expired or distance driven since the last service. If one of the thresholds is reached, the information display shows the appropriate service symbol and the remaining mileage.
Engine Malfunction Telltale (MIL)
The engine malfunction telltale (MIL) is actuated by the ECM via direct wiring to the IPC. The IPC has no influence on this.
Airbag Telltale
The SDM transmits the message "Airbag telltale ON" to the IPC. Upon receipt of this message, the IPC actuates the airbag telltale. If the IPC cannot actuate the airbag telltale, it transmits the message "Airbag telltale actuation failed" to the SDM and actuates an appropriate pictogram in the dot matrix display of the IPC.
Seat Belt Telltale
The SDM transmits the message "Seat belt telltale ON" to the IPC. Upon receipt of this message, the IPC actuates the seat belt telltale.
ABS Telltale
The ABS transmits the message "ABS display ON" to the IPC. This message is sent via the HSCAN from the ABS to the CIM interface and via the LSCAN to the IPC. Upon receipt of this message, the IPC actuates the ABS telltale.
Front Fog Lamp Telltale
The UEC transmits the message "Front fog lamps ON" to the IPC. Upon receipt of this message, the IPC actuates the front fog lamp telltale.
Rear Fog Lamp Telltale
The REC transmits the message "Rear fog lamp ON" to the IPC. Upon receipt of this message, the IPC actuates the rear fog lamp telltale.
Main Beam Telltale
The UEC transmits the message "Main beam ON" to the IPC. Upon receipt of this message, the IPC actuates the main beam telltale.
Left/right Turn Signal Lamp Telltale
The BCM transmits the message "Activate left or right turn signal lamp", the period duration and make-to-break ratio to the IPC via the LSCAN. The UEC transmits the message "Parking light, left and/or parking light, right ON" to the IPC via the LSCAN. Upon receipt of this message, the IPC actuates the left and/or right turn signal lamp telltale.
Diesel Glow Plug Telltale
The ECM transmits the message "Diesel glow plug telltale" to the IPC. This message is sent via the HSCAN from the ECM to the CIM interface and via the LSCAN to the IPC. Upon receipt of this message, the IPC actuates the diesel glow plug telltale.
Traction Control / Electronic Stability Programme Telltale
The ABS transmits the 3 messages "Display", "Make-to-break ratio" and "Period duration" to the IPC. This message is sent via the HSCAN from the ABS to the CIM interface and via the LSCAN to the IPC. Upon receipt of this message, the IPC actuates the traction control telltale in accordance with the specified values.
Coolant Temperature Telltale
The coolant temperature telltale is activated by the IPC for ignition ON, if the coolant temperature display exceeds a specified value.
Fuel Level Low Telltale
The fuel level telltale is activated by the IPC for ignition ON, if the fuel level falls below a specified value. If the fuel level falls below a 2nd threshold value, the fuel level telltale starts to flash.
Oil Pressure Low Telltale
The ECM transmits the message "Engine oil pressure telltale ON" to the IPC. This message is sent via the HSCAN from the ECM to the CIM interface and via the LSCAN to the IPC. Upon receipt of this message, the IPC actuates the engine oil pressure telltale.
Brake System Telltale
The BCM transmits the 2 messages "Brake fluid level low" and "Parking brake switch active" to the IPC via the LSCAN. Upon receipt of one of these messages, the IPC actuates the brake system telltale.
When the ignition is switched on, the parking brake telltale is activated for 4 seconds.
Battery Telltale (Alternator)
The ECM transmits the message "Alternator telltale ON" to the IPC. This message is sent via the HSCAN from the ECM to the CIM interface and via the LSCAN to the IPC. Upon receipt of this message, the IPC actuates the battery telltale.
Trailer Hitch Telltale
The REC transmits the message "Trailer present" to the IPC via the LSCAN. Upon receipt of this message, the IPC actuates the trailer telltale. The trailer telltale flashes if the turn signals or the hazard warning lights are active.
Cruise Control Telltale
The ECM transmits the message "Cruise control active" to the IPC. This message is sent via the HSCAN from the ECM to the CIM interface and via the LSCAN to the IPC. Upon receipt of this message, the IPC actuates the cruise control telltale.
Dimming Function
Dimming of Dial and Instrument Pointer
Dimming of the dials and instrument pointers is effected via a directly-wired terminal 58d signal. This signal is transmitted directly from the BCM to the IPC.
Dimming of Information Display
The BCM transmits the message "Dimming value for interior illumination " to the IPC via the LSCAN. Upon receipt of this message, the IPC adjusts the intensity of illumination of the information display accordingly.
The reset button in the IPC is used to reset the trip odometer and to reset the service interval display.