Altronic VariSpark CPU-XL, Operating Instructions Manual

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CPU-XL VariSpark IOM 07-21
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11.0 OUTPUT MODULE ELECTRICAL HOOK-UP
11.1 All required connections to the CPU-XL Output Module are made through
harnesses using multi-pin, threaded connectors.
11.2 BOTTOM 19-PIN CONNECTOR: The bottom 19-pin of the Output Module
connects to the Junction/Diag Module by means of harness series 793101-L or
793102-L. Insert the connector into the bottom Output Module receptacle and
hand-tighten; then carefully tighten an additional one-sixth turn with a wrench.
11.3 SIDE 19-PIN CONNECTORS: The 19-pin connectors “A on left” and “B on right”
are output connections to the EZRails by means of harness series 793102-L.
11.4 7-PIN CONNECTOR: The 7-pin connector is reserved for future development and is
not presently utilized. A sealed connector cap should be in place over this connector.
12.0 JUNCTION/DIAGNOSTIC MODULE ELECTRICAL
HOOK-UP
12.1 All required external connections to the CPU-XL Junction/Diagnostic Module are made
via harnesses using multi-pin, threaded connectors.
12.2 17-PIN CONNECTOR: Connection to the 17-Pin receptacle of the Junction/
Diagnostic Module is made using harness 293030-L, which has been properly
terminated inside the Logic/Display Module as described in section 10.0
12.3 19-PIN CONNECTORS: The 19-Pin connectors of the Junction/Diagnostic Module
mate to harnesses 793101-L or 793102-L coming from the Output Modules. Take
care that the harnesses route the proper signals to the appropriate bank (Output
Module) according to the application diagram developed for the installation on your
engine. Insert the connector into the receptacle and hand-tighten, then carefully
tighten an additional one-sixth turn with a wrench.
12.4 The firing order of the engine, as well as the cylinder identification (1, 2, 3…or 1L,
1R, 2L…or other), should be recorded on the chart in Figure 1.
12.5 After the correct firing order is identified by cylinder, and the cylinders have
been labeled, the specific ignition rail, which will be used to fire the coils for each
cylinder, can be identified. Each rail connects to one connector of an Output
Module using the harness provided.
12.6 The Junction/Diagnostic Module wiring is is used to determine which cylinder
is fired for each output event of the Logic/Display Module. The CPU-XL ignition
always fires in the same order as all other Altronic digital systems. The first firing
event is the one following the reset. The firing events are brought out in order of
occurrence (1, 2, 3, 4…) on the 20-position terminal strip inside the Junction/
Diagnostic Module. With the Junction/Diagnostic Module mounted with the
20-position terminal strip horizontal, and above the two vertical 10-position
output strips and connectors, the firing events are in order from left to right, going
from the first to the twentieth firing.
12.7 Wiring the Junction/Diagnostic Module internal jumpers to match the specific firing
order of the engine. As with a traditional ignition system such as the CPU-2000, the
igniton outputs must be matched to the proper cylinders according to the firing order
of the engine. This is done inside the Junction/Diagnostic Module using logic level
20AWG, 503128 jumper wires connected between the pluggable terminal blocks.
12.8 Inside the Junction/Diagnostic Module, two vertical, 10-position, terminal strips
are used to connect to the Output Modules via the 79310x-L cables. Each
10-position vertical strip is used to connect to one Output Module, which, in turn,
connects to the two ignition rails on a single bank of the engine. The upper five
terminals go to one rail through one connector of the Output Module and the lower
five terminals go to the other rail mounted on the same bank and connected to the
other connector of the same Output Module. This is more easily understood if the
entire ignition system is viewed as four separate systems, each of which can fire 1
to 5 cylinders with single or dual coils. Each Output Module contains two separate,
five-cylinder ignitions, and each one of these connects to a single rail. Single spark
plug per cylinder engine applications use engine rails having a maximum of five
coils per rail. Dual spark plug applications can have a maximum of ten coils per rail.
All applications service a maximum of five cylinders per rail.