System Overview: Signals

The tables below summarize the input and output signals to the units in the system for the immobilizer. The signal types are divided into directly connected signals, serial communication and controller area network (CAN) communication.

CENTRAL ELECTRONIC MODULE (CEM) (4/56)

Input signals	Output signals
Directly connected:	Directly connected:
Signal (12V) from the key-in switch when the key is in the ignition Input signals from the switches for the different key positions (I, II, III) in the ignition switch. Switch at the clutch pedal which indicates when the pedal is pressed (USA/CAN only, vehicles with manual transmissions).	Voltage supply to the Steering Column Lock Module (SCL) (does not apply to USA/CDN market for 2009-). Ground connection to the coil for the key lock function in the ignition switch.
Via serial communication (LIN):	Via serial communication (LIN):
Start control module (SCU) for communication with the key Steering Column Lock Module (SCL) with information about the steering column lock status (does not apply to the USA/CDN market for 2009-). Remote Receiver Module (RRX) for communication with keys and the alcolock's (option 2009-) handset unit (only vehicles without the keyless lock system).	Start control module (SCU) for communication with the key Steering Column Lock Module (SCL) for locking and unlocking commands (does not apply to the USA/CDN market for 2009-). Remote Receiver Module (RRX) for communication with keys and the alcolock's (option 2009-) handset unit (only vehicles without the keyless lock system).
Via CAN communication (LS-CAN):	Via CAN communication (LS-CAN):
Keyless vehicle module (KVM) to check the identity of the key and approve vehicle start (only vehicles with the keyless entry system). Phone module (PHM) (16/60) (only vehicles with remote-controlled immobilization).	Driver information module (DIM) for displaying messages. Keyless vehicle module (KVM) to check the identity of the key and approve vehicle start (only vehicles with the keyless entry system). Phone module (PHM) (16/60) (only vehicles with remote-controlled immobilization).
Via CAN communication (HS-CAN):	Via CAN communication (HS-CAN):
Engine control module (ECM) with information about the engine status and for the immobilizer function. Brake control module (BCM), with information about the vehicle's speed. Transmission control module (TCM) with information about vehicle speed and the position of the gear selector.	Engine control module (ECM) for communication and checking identity.

KEYLESS VEHICLE MODULE (KVM) (4/93) (ONLY VEHICLES WITH THE KEYLESS LOCKING SYSTEM)

Input signals	Output signals
Directly connected:	Directly connected:
Lock buttons on the handles on the side doors, for locking. Unlocking switch in the handles on the side doors, indicates that the door handle has been pulled out Unlocking contact breaker for the cargo compartment, indicates that the unlock button is pressed in. Quick lock motor contact breaker in the side doors, the motors can be activated Key-in contact breaker, indicates that the start knob is pressed in. Central electronic module (CEM), signal which indicates that the brake pedal is pressed Clutch switch (MAN), indicates that the clutch pedal is pressed	Internal antenna 1, for communication with a key in the passenger compartment Internal antenna 2, for communication with a key in the passenger compartment Antenna in the cargo compartment, for communication with keys External antenna left front, for communication with key External antenna right front, for communication with key External antenna left rear, for communication with key External antenna right rear, for communication with key External rear antenna, for communication with keys Quick lock motor left front, for opening the door. Quick lock motor right front, for opening the door. Quick lock motor left rear, for opening the door. Quick lock motor right rear, for opening the door.
Via serial communication:	Via serial communication:
Remote keyless entry (RKE) receiver (4/103), for receiving data from keys.	Remote keyless entry (RKE) receiver (4/103), control commands
Via Controller Area Network (CAN) communication:	Via Controller Area Network (CAN) communication:
Central electronic module (CEM) (4/56) Infotainment control module (ICM) (16/1) when changing customer parameters.	Central electronic module (CEM) (4/56) Driver information module (DIM) (5/1). Infotainment control module (ICM) (16/1) when changing customer parameters.

STEERING COLUMN LOCK MODULE (SCL) (4/102) (DOES NOT APPLY TO USA/CDN MARKET FOR 2009-).

Input signals	Output signals
Directly connected:	Directly connected:
Power supply from the central electronic module (CEM).	-
Via serial communication (LIN):	Via serial communication (LIN):
Central electronic module (CEM) for communication when locking and unlocking the steering column lock.	Central electronic module (CEM) for communication when locking and unlocking the steering column lock. Central electronic module (CEM) for information about the status of the steering column lock.

START CONTROL MODULE (SCU) (3/1)

Input signals	Output signals
Directly connected:	Directly connected:
Power supply from the key-in switch.	-
Via serial communication (LIN):	Via serial communication (LIN):
Central electronic module (CEM) for communication with the key.	Central electronic module (CEM) for communication with the key.

ENGINE CONTROL MODULE (ECM) (4/46)

Input signals	Output signals
Via Controller Area Network (CAN) communication:	Via Controller Area Network (CAN) communication:
Serial number from the Brake control module (BCM). Communication with the central electronic module (CEM) during start attempts.	Information about the engine status Communication with the central electronic module (CEM) during start attempts. Communication with the brake control module (BCM) during start attempts.

BRAKE CONTROL MODULE (BCM) (4/16)

Input signals	Output signals
Via Controller Area Network (CAN) communication:	Via Controller Area Network (CAN) communication:
Inquiry about the serial number from the engine control module (ECM) during start attempts.	Information about vehicle speed. Serial number and P/N to the engine control module (ECM).

TRANSMISSION CONTROL MODULE (TCM) (4/28)

Input signals	Output signals
Via Controller Area Network (CAN) communication:	Via Controller Area Network (CAN) communication:
-	Information about vehicle speed. Information about the position of the gear selector.

DRIVER INFORMATION MODULE (DIM) (5/1).

Input signals	Output signals
Via Controller Area Network (CAN) communication:	Via Controller Area Network (CAN) communication:
From the central electronic module (CEM) with information about which message must be displayed.	-

PHONE MODULE (PHM) (16/60)

Input signals	Output signals
Via Controller Area Network (CAN) communication:	Via Controller Area Network (CAN) communication:
From Central electronic module (CEM) (4/56) with information on remote-controlled immobilization.	To Central electronic module (CEM) (4/56) with information on remote-controlled immobilization.