Dipped beam, detailed description: Follow-me-home
When "Follow-me-home" is activated, dipped beam is lit in the front and the reversing lights or parking lights are lit in the back (which lights are lit is set using the diagnostic tool). This function is activated by removing the key from the ignition switch, opening the driver's door and pulling the main beam/dipped beam dipswitch back. The lights are lit for 30 seconds.
"Follow-me-home" means that the car lights are used when there are no other light sources.
A number of conditions must be fulfilled for BCM to activate this function:
- Key removed from ignition switch: BCM receives information via a bus message "Key position, ignition switch" from CIM (Column Integration Module) if the key is removed from the ignition switch. CIM receives information on pins 17, 18 and 23 from the ignition switch if the key is removed.
- Driver's door open: Voltage is supplied from the door switch to BCM pin 12 (LHD) or 11 (RHD) when the driver's door is open.
- Dipswitch activated: When the dipswitch (215) is activated, the bus message "Main beam, stalk active" is sent from CIM to BCM.