Murphy iGUARD, Installation And Operation Manual, Page: 40 / 64

Section 75 00-02-0522
04-06-11 - 36 -
Manufacturers Specifics
As of May, 2003 here are known manufacturers wiring guides and some peculiarities
associated with each manufacturer:
Detroit Diesel DDEC IV ECU

Install any/all ECU connections as per the DDEC manual.

Program relay 7 on the iGUARD to be "ECU enable"

Run a wire from the common of relay 7 to +V battery

Run a wire from relay 7, normally open terminal to the DDEC IV wire 439.
Notes: DDEC systems prior to December 2002 did not broadcast DM2 (stored) fault codes.
DDEC II systems are not SAE-J1939 equipped.
Detroit engines having more than 8 cylinders use multiple ECU’s in a master/slave
relationship. This will require that the address claim selection be enabled in the J1939 setup
screen.
John Deere ECU

Install any/all ECU connections as per your ECU manual.

Program relay 7 on the iGUARD to be "ECU enable"

Run a wire from the common of relay 7 to +V battery

Run a wire from the normally open contact of relay 7 to terminal G on the 21-pin
instrument panel connector.
Notes: John Deere originally implemented J1939 revision 2. When finalized, it implemented
revision 4 of the standard. As long as the iGUARD is set to "DEERE" as a manufacturer, we
can determine the ECU software revision and automatically accommodate for this version.
Volvo PENTA series ECU

Install any/all ECU connections as per your ECU manual.

Program relay 7 on the iGUARD to be "ECU enable"

Run a wire from the common of relay 7 to +V battery

Run a wire from the relay 7, normally open contact to the ECU terminal P.
Notes: Volvo PENTA does not appear to claim / allow claim of addresses on the J1939
databus. The iGUARD will automatically accommodate this when the iGUARD is set to
"VOLVO" as the engine manufacturer. Recent ECU software upgrades for load sharing and
synchronization require additional connections to the ECU - See the data supplied with the
engine.
The Volvo ECU also supports crank control directly from the ECU. This further simplifies
connecting the iGUARD to the Volvo ECU.
Phase-out
/ Discontinued
Product
Check
Availability