BspeedIL82
06-01-2014, 07:18 PM
I finally got around to swapping in my full 180sx chassis/engine room harnesses. I got a new WS RB25 harness to ensure I didn't have any more weird wiring issues. My intent is to finally use this PFC I have had for 2 years now, and my old chassis harness has been modified more than once and wanted to eliminate any potential wiring headaches. But first...get it to run once again.
And..I am now experiencing some minor glitches lol. I turn the key into the ON position, the dash lights up, the factory ecu lights up, the fuel pump does not prime.
I have been communicating back and forth with YURY from WS over the last week to try to help figure out what is going on.
I managed to pull some data this afternoon on some resistance numbers and voltages at the ecu and across the grounds. Am hoping someone may be able to point me in the right direction.
I measured the ohms for the following pins:
10, 20 measured 7.8 ohms.
30, 50, 60, 107, 108, 116 measured 8.8 ohms.
My chassis grounds near each of the relay blocks in the engine compartment, SMJ block, near the ecu, under the RH seat, and in the trunk--all measured <1 ohm to the negative terminal on the battery.
The following pins were tested for voltage:
16 measured .88v
43 measured .05V
21 measured 9.1V
45, 49, 59, 109 measured 12V
I even grounded out the black/purple wire on the chassis plug and the FP relay clicked each time it was grounded out.
My questions, how can I improve the grounding into the ECU as that is not near the value it needs to be. I believe I have heard that some people had to ground the ECU shell itself?
And if I jump pin 13 with some power, that should turn the pump on correct?
I am curious as to why this issue. I have new relays coming, as I have replaced all fuses already.
Am I overlooking a ground somewhere on this chassis harness?? Or possibly a relay/interface?
Thanks in advance.
Brandon
And..I am now experiencing some minor glitches lol. I turn the key into the ON position, the dash lights up, the factory ecu lights up, the fuel pump does not prime.
I have been communicating back and forth with YURY from WS over the last week to try to help figure out what is going on.
I managed to pull some data this afternoon on some resistance numbers and voltages at the ecu and across the grounds. Am hoping someone may be able to point me in the right direction.
I measured the ohms for the following pins:
10, 20 measured 7.8 ohms.
30, 50, 60, 107, 108, 116 measured 8.8 ohms.
My chassis grounds near each of the relay blocks in the engine compartment, SMJ block, near the ecu, under the RH seat, and in the trunk--all measured <1 ohm to the negative terminal on the battery.
The following pins were tested for voltage:
16 measured .88v
43 measured .05V
21 measured 9.1V
45, 49, 59, 109 measured 12V
I even grounded out the black/purple wire on the chassis plug and the FP relay clicked each time it was grounded out.
My questions, how can I improve the grounding into the ECU as that is not near the value it needs to be. I believe I have heard that some people had to ground the ECU shell itself?
And if I jump pin 13 with some power, that should turn the pump on correct?
I am curious as to why this issue. I have new relays coming, as I have replaced all fuses already.
Am I overlooking a ground somewhere on this chassis harness?? Or possibly a relay/interface?
Thanks in advance.
Brandon