Charge Warning Lamp

Charge Warning Lamp








The charging warning lamp is located near to the temperature gauge and indicates to the driver whether or not the alternator is charging.


The lamp is supplied from the main instrument unit and grounded internally in the main instrument unit.


If the alternator is not rotating or for any other reason it is not charging, pin 30 on the main instrument unit is grounded through the alternator field winding via the regulator. The control module then switches on the lamp. At engine speeds exceeding 300 rpm the MIU sends a message to the SID requesting an acoustic signal.


When the generator is charging, D+ on the generator has the same voltage as B+ on the generator, which means that the input on the MIU is supplied with power B+ whereupon the control unit turns off the lamp.


Diagnosis


The function has no diagnostics.