C.2. DFU to Spark Plugs
The coils fire in a specific order for each engine configuration. The proper coil must be connected
to the correct cylinder in the firing order.
C.2. 1 Coil Notation
The following notation is used when referring to coils. A letter and a number are combined to
identify a coil. The letter refers to the coil location on the DFU. The coil located closest to the connector is
Coil A. The coil next to it is Coil B. If the DFU contains three coils, the last coil is Coil C. The number
identifies the DFU that the coils are on. In an engine configuration using only one DFU, the number
following the letter is 1. Coil notation is shown in Figure C.2.1.
Note: Each coil has two towers for spark plug wires. The towers are identical and should be thought of as
the same coil. For example, if the engine setup guide refers to cylinder 1 connected to Coil A1 and
cylinder 6 connected to Coil A1, you can connect your spark plug wires for the respective cylinders to
EITHER tower.
Figure C.2. 1 :
Coil notation
Figure C.2.1 shows a configuration using two 3-coil DFU’s. If you are using 2-coil DFU’s the numbering
is the same except there is not C1 and C2. If your application requires only the use of one DFU, then A2,
B2, and C2 will not be present.
Figure C.2. 2 :
4-Cyl DFU Setup
______________________________________________________________________________________
TECgt Manual Version 2.0
- Page 38 -
©2008 Electromotive, Inc.
