Block Diagram
CAN abbreviations
| 30 | Battery positive (terminal 30) | S36 | Switch – residual brake fluid |
|---|---|---|---|
| A14 | Heating controls, heated rear screen switch | S84 | Switch – residual coolant switch |
| B23 | Ambient temperature sensor | S120 | Switch, hazard warning lamps |
| E8 | Ashtray lamp | S135 | Switch – bonnet, ATWS |
| R1 | Cigarette lighter | S181 | Switch -parking brake |
| R1(15A) | Relay, terminal 15A | S195 | Switch, tailgate unlocking |
| R8 | Load relay |
Block Diagram (Continued)
| A14_A | Heater controls | S121 | Switch unit – lights |
|---|---|---|---|
| A143 | Telephone | S198_L | Seat heating switch, rear left |
| A162 | Front interior lamp | S198_R | Seat heating switch, rear right |
| B51 | Brake lining wear sensor | S221_RL | Switch – window winder, rear left |
| P3 | Instrument assembly | S254 | Switch, ultrasonic sensor, ATWS |
| R22 | Heated rear screen (glass breakage sensor, ATWS) | S258 | Park pilot switch |
| S53 | Switch – driver's seat heating | Y29 | Central door locking motor, tailgate |
Block Diagram (Continued)
| A162 | Front interior lamp | X125 | Engine compartment electronics module |
|---|---|---|---|
| E67 | Interior lamp, rear | Y10 | Motor – fuel tank flap, central door locking system |
| M14_L | Motor – window winder, rear left | Y13_D | Motor – central door locking, driver |
| M14_R | Motor – window winder, rear right | Y13_P | Motor – central door locking, passenger |
| S221_RL | Switch – window winder, rear left | Y31_D | Motor – central door locking, rear left |
| S221_RR | Switch – window winder, rear right | Y31_P | Motor – central door locking, rear right |
| X97 | Rear electronics module |
Block Diagram (Continued)
| 31 | Ground (terminal 31) | E120_R | Sun visor lamp, right |
|---|---|---|---|
| A132 | Radio | H16_A | ATWS horn |
| A162 | Front interior lamp | H16_B | Alarm siren (Vauxhall) |
| E62 | Luggage compartment lamp | S177 | Switch – passenger's seat heating |
| E67 | Interior lamp, rear | S221_RR | Switch – window winder, rear right |
| E64_RL | Door lamp, rear left | S254 | Switch, ultrasonic sensor, ATWS |
| E64_RR | Door lamp, rear right | S258 | Park pilot switch |
| E82 | Glove compartment lamp | S259 | Switch – sunscreen |
| E120_L | Sunscreen lamp, left |
Function Table
Wiring harness plug X1 = 78-pin
Wiring harness plug X2 = 16-pin
| Terminal | Description | Source | Destination |
|---|---|---|---|
| X1-1 | Serial connection to ultrasonic sensor (only anti-theft warning system) | BCM | A162 |
| X1-2 | Input signal, rear screen heating as glass breakage sensor (only anti-theft warning system) | R22 | BCM |
| X1-3 | Hazard warning switch instrument dimming (58d) and telltale | BCM | S120 |
| X1-4 | Window winder actuation, rear right – close window | BCM | M14_R |
| X1-5 | Window winder actuation, rear left – close window | BCM | M14_L |
| X1-6 | Actuation of interior lamps | BCM | A162 E67 |
| X1-7 | Input from light switch – rear fog lamp | S121 | BCM |
| X1-8 | Instrument illumination dimming via the light switch | S121 | BCM |
| X1-9 | Door contact switch, rear left is read in | Y31_D | BCM |
| X1-10 | Door contact switch, rear right is read in | Y31_P | BCM |
| X1-11 | Door contact switch, front right is read in (only with anti-theft warning system) | Y13_P | BCM |
| X1-12 | Door contact switch, front left is read in (only with anti-theft warning system) | Y13_D | BCM |
| X1-13 | Brake fluid level sensor is read in | S36 | BCM |
| X1-14 | Ground for BCM | Ground | BCM |
| X1-15 | AC switch is read in (not with ECC) | A14 | BCM |
| X1-16 | Switch, tailgate unlocking | S195 | BCM |
| X1-17 | Output for instrument dimming (58d) | BCM | A132 S177 S221_RR S254 S258 S259 |
| X1-18 | Actuation for door lamp, rear left | BCM | E64_RL |
| X1-19 | Output for interior lamps with load disconnection | BCM | REC |
| X1-20 | Central door locking system, rear doors and tank flap – unlock | BCM | Y31_D Y31_P Y10 |
| X1-21 | Ground for central door locking system function | Ground | BCM |
| X1-26 | Window winder actuation, rear right – open window | BCM | M14_R |
| X1-27 | Window winder actuation, rear left – open window | BCM | M14_L |
| X1-28 | Input from light switch – front fog lamps | S121 | BCM |
| X1-29 | Input from light switch – parking light | S121 | BCM |
| X1-30 | Input from light switch – low beam | S121 | BCM |
| X1-31 | Ultrasound deactivation via switch (only with anti-theft warning system) | S254 | BCM |
| X1-33 | Park pilot switch is read in | S258 | BCM |
| X1-34 | Luggage compartment lock switch, luggage compartment is opened | Y29 | BCM |
| X1-35 | Ground for light switch | BCM | S121 |
| X1-36 | Sensor for coolant fluid level is read in | S84 | BCM |
| X1-38 | Output for instrument dimming (58d) | BCM | A14_A A162 A143 P3 S53 S198_L S198_R S221_RL |
| X1-39 | Output for interior lamps with load disconnection | BCM | E82 |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Ambient temperature (AHS, DIS) Brake lining wear (DIS) Coolant level (DIS) Coolant level low (DIS, CIM, IPC) Park pilot active (PAS) Alarm horn switched on (DIS, REC, UEC) Service alarm system display ON (DIS) | BCM | AHS DIS CIM IPC PAS REC UEC |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Park pilot switched on/off | PAS | BCM |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Rear window winder switch disabled / active / signal request, rear window winder disabled / signal request, movement of all windows | DDM | BCM |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Status, interior illumination / instrument dimming value | BCM | CIM DDM DIS DSM IPC PDM SLM |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Low beam switched on Parking light switched on Heated outside mirror request (DDM, PDM) Fog lamp switched on (UEC) | BCM | CIM DIS DDM PDM REC UEC |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Parking brake switch active Signal request, AC compressor (CIM) | BCM | CIM IPC PAS REC UEC |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Turn signal and hazard warning lights activation Flashing period and control cycle | BCM | CIM IPC REC UEC |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Turn signal switch activated | CIM | BCM |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Turn signal lamp, front left defective Turn signal lamp, front right defective | UEC | BCM |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Turn signal lamp, rear left defective Turn signal lamp, rear right defective Trailer turn signal lamp, left defective Trailer turn signal lamp, right defective | REC | BCM |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Central door locking system conditions Outside mirror heating active | DDM PDM | BCM |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Central door locking system conditions | BCM | CIM DDM DIS DSM IPC PDM REC SRM UEC |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Central door locking system request | BCM | DDM DIS DSM PDM REC UEC |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Trailer hitched to vehicle Heated rear screen switched on | REC | BCM |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Fan run-on active (prevents false ultrasonic alarm) Heated outside mirror switch active Heated rear screen switch active | DIS | BCM |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Radio remote control activation | CIM | BCM |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Ignition lock information | CIM | BCM |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Loudspeaker characteristics / tone / rhythm / number of repetitions / control cycle Parking brake warning | BCM | CIM |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Airbag deployed | SDM | BCM |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Vehicle speed Engine running status | CIM | BCM |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Transmission – engaged gear | CIM | BCM |
| X1-40 X1-41 X1-42 X1-43 LSCAN | Diagnosis information | DIAG BCM | BCM DIAG |
| X1-44 | Ambient temperature sensor signal | B23 | BCM |
| X1-45 | Serial connection to alarm siren (only Vauxhall / anti-theft warning system) | BCM | H16_B |
| X1-46 | Synchronisation of the front and rear turn signal lamps | BCM | REC UEC |
| X1-47 | Reference ground for ambient temperature sensor | BCM | B23 |
| X1-48 | Actuation of status LED (only with anti-theft warning system) | BCM | S254 |
| X1-49 | Park pilot switch telltale is activated | BCM | S258 |
| X1-50 | Actuation for door lamp, rear right | BCM | E64_RR |
| X1-52 | Activate/deactivate rear window winder | BCM | S221_RL S221_RR |
| X1-53 | Output to heated rear screen telltale (not with ECC) | BCM | A14 |
| X1-54 | Actuation of horn relay (only with anti-theft warning system) | BCM | H16_A |
| X1-55 | Parking brake switch is read in | S181 | BCM |
| X1-56 | Input signal, brake lining wear | B51 | BCM |
| X1-57 | Heated rear screen switch is read in (not with ECC) | A14 | BCM |
| X1-58 | Tailgate unlocking switch is read in (only with anti-theft warning system) | S195 | BCM |
| X1-60 | Bonnet switch is read in (only with anti-theft warning system) | S135 | BCM |
| X1-61 | Hazard warning lights switch is read in | S120 | BCM |
| X1-74 | Instrument dimming (58d) for cigarette lighter | BCM | E8 R1 |
| X1-77 | Central door locking system, rear doors and tank flap – anti-theft protection | BCM | Y31_D Y31_P Y10 |
| X1-78 | Central door locking system, rear doors and tank flap – lock | BCM | Y31_D Y31_P Y10 |
| X2-5 | Voltage supply for BCM, fuse F9 | UEC | BCM |
| X2-6 | Actuation of terminal 15A relay | BCM | R1(15A) |
| X2-8 | Control output for load relay | BCM | R8 |
| X2-15 | Input from load relay | R8 | BCM |
| X2-16 | Voltage supply for central door locking function, fuse F7 | UEC | BCM |
Functional Description
The BCM is responsible for:
- all interior illumination functions
- all functions of central door locking system Direct actuation of the rear central door locking motors and the tank flap
- the anti-theft warning system
- turn signal functions, turn signal synchronisation
- rear screen and outside mirror heating
- direct actuation of the rear window winders
Exterior Lighting
The BCM reads in the switch positions from the light switches directly via conventional wiring.
This information is transmitted to the relevant control units via CAN messages.
The following information is read in:
- Parking light
- Low beam
- Front fog lamps
- Rear fog lamp
The hazard warning light switch is also read in via conventional wiring.
See also Chapter: Exterior lighting – function
Flash Functions
The BCM controls the following flash functions:
- Turn signal lamps
- Side turn signals
- Hazard warning lights
- Central door locking system flashing
- Anti-theft warning system flashing
The various flashing frequencies are determined by the BCM, for instance when a turn signal lamp is defective, the flashing frequency is increased on the relevant side.
See also Chapter: Turn signal lamp system – function
Interior Illumination
The interior illumination includes the following functions:
- Instruments and switch dimming
- Sill illumination
- Interior lamp with reading lamps
- Glove compartment, luggage compartment, vanity mirror illumination
- Backlighting for various switches
- Automatic load disconnection of the interior lamps if consumers are still switched on 15 minutes after the vehicle is parked
See also Chapter: Interior illumination – function
Park Pilot PAS
The status of the park pilot switch is read in by the BCM and transmitted to the park pilot control unit as a corresponding CAN message.
As a reply, the PAS transmits a CAN message with its condition, whereupon the BCM switches on the telltale.
Central Door Locking System
The BCM is responsible for all the memory functions.
See also Chapter: Central door locking system – function
Heater Fan Run-On
The BCM can allow the fan to run on at the maximum fan speed after the AC / ignition has been switched off. For this purpose, the ultrasonic sensors of the ATWS are deactivated to prevent a false alarm during the run-on period.
Add-On Heater Control Unit Ahs
The BCM reads in the ambient temperature value and switches on the add-on heater via a CAN message when the temperature falls below approx. 8 °C.
Heated Rear Screen and Electric Outside Mirrors
The switch for the heated rear screen / mirror heating is read in by the BCM.
In vehicles without ECC, the switch is connected directly to the BCM. In vehicles with ECC, the BCM receives the switch actuation information in a CAN message from the ECC. This is transmitted from the mid-speed CAN bus to the low-speed CAN bus via the DIS interface.
After a period of approx. 15 min, the screen heater is automatically switched off again by the BCM.
Additional Functions for Anti-Theft Warning System
- Monitoring of doors, tailgate, bonnet contacts
- Serial interface for alarm siren (Vauxhall)
- Serial interface for ultrasonic sensors
- Integrated inclination sensor
- Rear screen monitoring
- Control of anti-theft warning system horn
- Ultrasound – OFF switch in dashboard for next activation period
- Auxiliary heating (as of Model Year 2003) disables the ultrasonic function
See also Chapter: Anti-theft warning system – function