That is just a standard relay, 85 and 86 is for the control side of relay, coil symbol, B+ and ground, as far as testing the coil side of relay, with relay unplugged, as long as there isn't a diode in the relay, it doesn't matter which one is ground or voltage, for testing purposes.
Terminal 30 and 87 is for the load side of relay. When the relay is energized, there should be continuity between those terminals, otherwise, no. I have used a 9 volt battery and test wires to check relay. You use the battery on the coil side of relay, then check for continuity between the load terminals.
Code 11 maybe the rpm signal, code12 the pcm has lost battery voltage at some time, code32 egr issue, code 55 end of message. Right now it seems like a sensor problem. The computer has to ground the coil side of relay, or nothing the relay supplies gets voltage.
Saturday, February 21st, 2009 AT 2:32 PM