Fault Code Guide

• Small Cooling Package: The condenser is
mounted below the charge air cooler and does
not cover the entire face of the radiator. See
Fig. 2.
• Large Cooling Package: The condenser is
mounted in front of the charge air cooler. See
Fig. 3.
Determine Fins per Inch (fpi) of a
Small Cooling Package
Condenser
Early Business Class M2 vehicles with a small cool-
ing package were equipped with a 14-fpi condenser.
In October 2002, the 14-fpi condenser began being
phased out and replaced with a 19-fpi condenser.
The 14-fpi condenser may still be found on vehicles
built through March 2003. For vehicles built from Oc-
tober 2002 through March 2003, it is necessary to
determine whether the vehicle was built with a 14-fpi
or 19-fpi condenser.
If the vehicle has a large cooling package, it is not
necessary to determine the number of fins per inch
on the condenser to determine which temperature/
pressure specification table to use. All Business
Class M2 vehicles with a large cooling package use
a 14-fpi condenser.
Use the following steps to determine whether the
condenser has 14 fpi or 19 fpi.
1. Locate a section on the condenser face that is
free of bent fins, and place a white sheet of
paper over that area.
2. Using a soft-lead pencil, rub the lead lightly on
the paper to transfer the impression of the fins to
the sheet of paper. Transfer the impression to
obtain an area about 1 inch by 3 inches (25 mm
by 76 mm) on the paper.
IMPORTANT: Be careful not to bend the fins
while transferring the impression.
04/02/2003
1
2
3
f831572
1. Radiator
2. Charge Air Cooler
3. Condenser
Fig. 2, Small Cooling Package
3
1
2
01/21/2008 f831792
1. Condenser
2. Charge Air Cooler
3. Radiator
Fig. 3, Large Cooling Package
Cab Heater and Air Conditioner, Valeo 83.00
Specifications
Business Class M2 Workshop Manual, Supplement 15, March 2009400/2