Rewiring

[nab911]

Ok, my ecu got "dislodged" and it cut most of the wires so i have to rewire it. I have been having loads of problems before so im going to do this right this time. I checked srswap.com and thats a halfass writeup of how to wire the ecu. I have 2 black wires coming off the ecu and one in the dash, and a couple of wires that dont match up. Next, someone mentioned to make sure that i wire up the knock sensor right so... can someone give me a full break down of exactly how to wire the ecu to the dash?

Nick

[pulsar gtr]

Hi,

To wire your knock sensor you need to a shielded wire similar to an RCA audio wire or cable tv wire idea etc.., Look at the engine harness wire plug that goes behind the battery and the passenger fender, it should have two wires one is white wire (signal) and black wire (shielded ground), if you have the plug for the knock sensor, just hook the white wire of the knock sensor plug to the white wire on the plug behind the battery and the black wire of the knock sensor to the black wire on the plug behind your battery.

The white and black wires are accross from each other on the plug behind the battery.

Hope this info helps.

Good luck,PULSAR GTRRafi

[F3600]

Im sorry to bust in your topic but .. if we dont use a sheilded wire ? is this going to cause some problem ?

[pulsar gtr]

The shielded ground is there to illiminate any noise that might get picked up and cause false detonation.The alternator and other electronics component/equipment in the car can generate frequecies that might be picked up by the detonation signal wire, to illiminate that, they wrap the signal wire with a shielded ground to prevent any noise/frequencies to make it to the signal wire and trigger false detonation.

PULSAR GTRRafi

[c-rad]

Kind of OT, but does the CA knock sensor output a raw knock value that can be read by devices such as the SAFCII?

[pulsar gtr]

The knock sensor outputs an analog signal which the ecu will transform it into digital signal

The detonation sensor acts as a filtered microphone where it only transfer high frequency noise (1.5KHZ-3KHZ, but don't quote me that acuracy of the frequency)and send it to the ecu for analysis which then the ecu will determine if the received signal caused by detonation.

PULSAR GTRRafi

[c-rad]

Right, I know its an analog signal, but I was just wondering because on 1st gen DSMs, you can read the knock value from a SAFC but on an 2G, you can't.

[pulsar gtr]

I am not very familiar on the DSM cars, but I believe that 2G have the OBDII system which that might be the reason why you can't read the knock value from a SAFC

PULSAR GTRRafi

[nab911]

Well back to the topic, I have 3 ground wires and not sure if i should just hook them all together or what. There are 2 on the chassis and one on the ecu. The 2 on the chassis are different sizes...

[c-rad]

Well back to the topic, I have 3 ground wires and not sure if i should just hook them all together or what. There are 2 on the chassis and one on the ecu. The 2 on the chassis are different sizes...

NO! Never wire grounds together! Every ground wire should have a seperate CLEAN grounding point.

[nab911]

Ok so which black ones should i hook together or should i just run the wires ontol some metal piece around there? I may take a look at this tonight and that could have been my problem in the first place....