Diagnostic Functions

Diagnostic functions

General
The keyless vehicle module (KVM) has internal diagnostics. It continuously monitors most of the inputs and outputs. It does not monitor the outputs for the antennas. The antennas are checked every operating cycle when vehicle speed exceeds 20km/h (12mph).

Diagnostic trouble codes (DTCs)
A diagnostic trouble code (DTC) is stored if the keyless vehicle module (KVM) detects a fault. If for any reason a fault should disappear after the diagnostic trouble code (DTC) has been stored, information about the diagnostic trouble code (DTC) remains in the keyless vehicle module (KVM).

Reading and erasing diagnostic trouble codes (DTCs)
Stored diagnostic trouble codes (DTCs) can be read off and erased using this function.
This function can also be used to read off whether the fault is still present (permanent) or whether it has now ceased (intermittent) after the diagnostic trouble code (DTC) has been stored.
Diagnostic trouble codes (DTCs) can only be erased once all the diagnostic trouble codes (DTCs) have been read off at least once.

Reading off input and output signals
This function can be used to continuously read off the values and status of the keyless vehicle module (KVM) input and output signals.

Reading off extended fault-tracing information
This function is used to read off the global parameters (frozen values). Frozen values are the global values which applied when the diagnostic trouble code (DTC) was stored. These values are stored at the same time as a diagnostic trouble code (DTC). They can be read off if necessary.

Reading off the parameters
This function is used to read off the parameters programmed in the control module. A security code is required to read off these parameters.

Reading off the control module identification
The control module can be identified by means of reading off a number of codes.
The codes contain information about the control module:
- hardware P/N (control module without software)
- hardware serial number (control module without software)
- software P/N
- diagnostic software P/N.
- serial number for remote keyless entry (TRX) receiver.

Internal program
The keyless vehicle module (KVM) contains a number of internal programs. This facilitates the management of certain functions. These can be activated using the software manager. The internal programs are:
- Checking the keyless system. The program checks all connected units and components. If the control module detects a fault during these checks, the result will be displayed in the diagnostic tool window.
- Erase all passive remote keys. The program erases all programmed remote keys. Those remote keys which will still be used by the keyless entry system must be added using the "Add passive remote key" procedure.
- Add passive remote key. Adds a passive remote key to the system.

Description of programmable parameters, customer adaptation
The system can be adapted to the wishes of the customer in a variety of ways. How unlocking is carried out when an unlock sensor is activated be affected. The method of unlocking depends on which remote key has been found after a search has been carried out around the vehicle. One setting can be stored per remote key. Up to four settings can be stored in the keyless vehicle module (KVM). Settings are made via the Infotainment control module (ICM). The following settings can be made:
- Total unlocking: All doors and the luggage compartment lid are unlocked if a handle is pulled out or the unlock button for the luggage compartment lid is pressed as long as there is a valid remote key at that door
- Selective unlocking, one of the doors: The vehicle can only be unlocked using the handle on one of the doors if there is a remote key at that door. The door on which the handles was pulled unlocks and opens. The other doors must be opened using the remote key "keyless entry" or using the central locking switch inside the vehicle. If the handle for the luggage compartment lid is used, only the luggage compartment lid will unlock and open.
- Selective unlocking: both front doors: The vehicle can only be unlocked using the handle on one of the front doors if there is a key at that door. The front door on which the handles was pulled unlocks and opens. The other front door unlocks. The other doors must be unlocked using the remote key or using the central locking switch inside the vehicle. If the handle for the tailgate is used, only the tailgate will unlock and open.
- Selective unlocking, doors on the same side:The vehicle can only be unlocked using one of the handles on the front or rear doors if there is a valid remote key at that door. The door on which the handle was pulled out unlocks and opens. The other door on the same side unlocks. The other doors must be unlocked using the remote key "keyless entry" or using the central locking switch inside the vehicle. If the handle for the luggage compartment lid is used, only the luggage compartment lid will unlock and open.
The customer can select the applicable setting if an Infotainment control module (ICM) is installed in the vehicle. The setting is transmitted to the keyless vehicle module (KVM) via the controller area network (CAN) when any change is made. The default setting when the vehicle is supplied is stored in the central electronic module (CEM).