Lingenfelter L460240000 Lingenfelter NCC-002 Nitrous Control Center v1.5 - Manual (Page 167)

Appendices 166
9.5 Appendix E: Enabling ECM Engine Speed Signal Output
On some vehicles (such as the 2010-2013 Camaro, 2007-2013 C/K Trucks, and 2009-2013 CTS-V), the
tachometer is not connected to the ECM by a direct tachometer signal wire. Instead, the dash receives the RPM
signal via some other method (such as serial data or CAN). In most cases, however, the vehicle’s ECM has an
unpopulated pin that can be used to communicate the tachometer signal from the ECM to an external device,
such as the NCC-002. The following sections explain how to connect a wire to the correct pin on the ECM, as
well as how to enable the ECM tachometer output using EFILive Tune v7.5.
9.5.1 Populating the Tachometer signal wire on the ECM (GM E38, E67 ECM's)
1. Determine the correct ECM pin location for the engine speed (tachometer) output signal on your vehicle. A
list of tachometer signal pin locations for some GM vehicles has been provided in Appendix C: Tables and
Diagrams .
2. Disconnect the ECM connector that houses the tachometer output signal terminal. Use a small flat head
screwdriver to open the wire enclosure on the back side of the connector. This exposes the wires as they
come out of the connector.
3. If there is a terminal cover on the front side of the connector, use a small flat head screwdriver to remove it by
prying up on each end. You should now see the terminals of each wire, along with colored terminal plugs in
pin locations that are not currently populated.
4. Locate the ECM’s engine speed (tachometer) output signal pin location on the connector. Remove the
colored terminal plug from the connector with a small screwdriver.
5. Crimp a terminal (PN: 0334680003 -- for E38/E67 ECM's) to a piece of wire (long enough to reach from the
ECM to the NCC-002), which will become your tachometer output signal wire. The terminal will lock into the
connector when oriented correctly, so make sure that you have the terminal correctly oriented before
attempting to insert the terminal into the connector.
6. Insert the terminal into the correct pin location from the back side of the connector. You should here an
audible “click,” which tells you that the terminal is inserted in the correct orientation and has locked into place.
7. Reinstall the terminal cover, close the connector wire enclosure, and reinstall the connector onto the ECM.
8. This wire can now be connected to the "Tach Input" terminal on the NCC-002.