Ignition Wiring
Coil Wiring
For many engines there is a built-in setup option under ignition setup that should pre-fill the harness and coil setup. For reference, the details are discussed here.
Board to Box Wiring
On the ignition circuit board there are one or two 9-pin coil connectors (depending on if the module supports 8 or 16 cylinders). In either case the outside box connector is a 19-pin MIL circular connector.
PCB Connector
The ICM has two of these PCB connectors on the board. If the module is for 8-cylinders or less than only one of the two is installed. The first connector (connector 1) is the one nearest the incoming power plug.
Box Connector
The box connector is a 19-pin circular connector, MIL DTL-5015 type, shell size 22-14. The above diagram shows the arrangement of the pins from the back of the box connector or looking into the harness connector. If looking into the box connector the pins will be flipped (i.e. C would be on the left if the tab is up). When in doubt, the connector itself shows the pin letters next to the pin, though the text is small.
PCB to Box table
Note in the table below "Plug 1" is the 9 pin PCB plug nearest the power connection on the PCB, and "Plug 2" is the other plug.
| Circular Pin | Destination |
|---|---|
| A | Plug 1, A |
| B | Plug 1, B |
| C | Plug 1, C |
| D | Plug 1, D |
| E | Plug 1, E |
| F | Plug 1, F |
| G | Plug 1, G |
| H | Plug 1, H |
| T | Plug 1, I |
| U | Ring Terminal |
| J | Plug 2, A |
| K | Plug 2, B |
| L | Plug 2, C |
| M | Plug 2, D |
| N | Plug 2, E |
| P | Plug 2, F |
| R | Plug 2, G |
| S | Plug 2, H |
Coil Harness Wiring
Note: for coil rail pinouts see Waukesha_VHP_Engine_Controls#Ignition_Coils
Typical coil harnesses are constructed using the table below. Note that the positive wires are "daisy-chained" between all coils "+" terminals, and the individual coil wires connect to coil "-" terminals.
Important note: In the positions below the numbers are the position along the harness from one end to the other. For an inline engine this typically matches the cylinder number. For "V" engines it may not match the cylinder number, check the engine information.
| Circular Pin | Typ. Coil | 4-cyl position | 6-cyl position | 8-cyl position | 12-cyl position |
|---|---|---|---|---|---|
| A | Black 1 | 1 | 2 | ||
| B | White 1 | 1 | 2 | 3 | 1 |
| C | Green 1 | 2 | 3 | 4 | 2 |
| D | Yellow 1 | 1 | |||
| E | Blue 1 | 4 | 5 | 6 | 4 |
| F | Orange 1 | 3 | 4 | 5 | 3 |
| G | Brown 1 | 6 | 7 | 5 | |
| H | Violet 1 | 8 | 6 | ||
| T | Red 1 | * | * | * | * |
| U | Drain | ||||
| J | Black 2 | 8 | |||
| K | White 2 | 9 | |||
| L | Green 2 | 10 | |||
| M | Yellow 2 | 7 | |||
| N | Blue 2 | 12 | |||
| P | Orange 2 | 11 | |||
| R | Brown 2 | ||||
| S | Violet 2 |
- Wire will daisy-chain to all coil (+) terminals
Setup on EIM or DCT
In most cases the "Engine Quick Setup" should fill in the proper wiring information.
On step 3 of ignition setup the page will ask for the firing order. Essentially this names the cylinders.
The next step, step 4, actually maps the cylinder names to the harness. Note that the "Harness P/N" is used to pull in the color information. If the harness p/n in use is not shown on the screen, the setup can still be done but the colors may be incorrect.
Note that on ignition setup step 4 the "Harness number" and "Wire" letter match the table in the section above titled "PCB to Box Table". This will always determine the pin fired, even if the colors are incorrect.
Example
In the above screenshot, cylinder 1 is mapped to harness 1, wire A. Referring to the "PCB to Box table" above, plug 1 wire A is connected to circular connector pin A. When testing the coil it should be seen at circular connector pin A.
For another example in the screenshot, cylinder 11 is on harness 2, wire E. Referring to the "PCB to Box table" above, plug 2 wire E connects to circular connector pin N. When testing the coil it should be seen at circular connector pin N.
Testing
The harness and firing order setup can be tested at Ignition_Testing_Tools#Engine_off_testing. This can be used to make sure everything is correct.
Speed / Timing Input Wiring
There are three speed/timing inputs on the box: Flywheel MPU, index MPU, and index hall sensor. Only one of the two index inputs will be used, so there should always be exactly two of these three in use. The image below shows the plug locations.
Flywheel MPU
The flywheel MPU connects as shown below.
For magnetic pickups the wiring order between the two signal wires does not matter. As long as the circular connector "A" and "B" are on the MPU it should work.
Index MPU
The index MPU wires in the box as shown in this table
| Circular Pin | PCB Pin | Destination |
|---|---|---|
| A | 22 | Index MPU A |
| B | 23 | Index MPU B |
| C | Shield |
For magnetic pickups the wiring order between the two signal wires does not matter. As long as the circular connector "A" and "B" are on the MPU it should work.
Hall Sensor
The hall sensor wires in the box as shown in this table
| Circular Pin | PCB Pin | Destination |
|---|---|---|
| A | 26 | Hall ground |
| B | 24 | Hall signal |
| C | Shield | Shield |
| D | 14 (+12v) | Hall sensor power |
The pinout of hall sensors vary. For a 330xB sensor (13240-0002):
For a threaded hall sensor (13241, 13264):
Power / Comm (Panel) Wiring
The ignition box has a 8-pin circular connector that runs back to the panel. The connection table is shown below.
| Circular Pin | Cable color | Wire color | PCB Pin | Description |
|---|---|---|---|---|
| A | Gray | Green | 28 | CAN Cmn |
| B | Gray | Yellow | 30 | CAN H |
| C | Gray | Blue | 29 | CAN L |
| D | Orange | Red | 37 | BATT + |
| E | Gray | Black | 32 | Tach signal |
| F | Gray | White | 4 | Alarm output (closes to ground on ICM alarm) |
| G | Gray | Red | 17 | Shutdown input (panel closes to ground to kill ICM) |
| H | Orange | Black | 36 | BATT - |
Important Note: The power/comm harness has two sections as shown above, so there are two red wires and two black wires. Be careful to find the red/black wire that come from their own cable -- this is the power input. The other black/red wires are for shutdown and tachometer.
The wires from the power/comm harness will land at panel terminal blocks and route to the appropriate location. See the Ignition Installation Guide for more information. Note that on EMIT panels the alarm output is not used since the alarm info is shared via CAN. The unused wire should be landed or taped off so it doesn't short anything.
Wiring Overview
This diagram does not show the box connector pinout, but shows an overview of where devices end up landing on the board.
