Central Electronics Box: Description and Operation

Module Box (F23) Location:

PURPOSE
The module box (F23) is designed to protect and cool the control units from the various influences in the engine compartment.

LOCATION
The module box is located in engine compartment, passenger side near firewall.

Module Box (F23) And Blower Motor (M2/2):

OPERATION
The control units are located in the module box and therefore protected from dust, water, oil and other substances that could damage them. A blower motor (M2/2) controls the temperature in the module box. The blower motor is in operation;
^ For 1.5 seconds after engine start if the engine speed exceeds 1200 RPM.
^ If the temperature in the module box is above 60 °C (140 °F).

If the module box temperature exceeds 70 °C (158 °F), the base module will store a malfunction code.

Control Unit Arrangement In Module Box (F23):

CONTROL UNIT ARRANGEMENT
The individual connection fields in the module box are identified by numbers. This, along with color coded connectors, allows for easy coordination of the wiring harness with the respective connection field and control unit.

Control Unit Color Code Location:

CONTROL UNIT COORDINATION AND I.D.
A color code identification mark on each control unit is identical to its respective connector in the module box.

Control Unit I.D. Chart:

I.D. AND LOCATION CHART