sacrileger
Proven Member
- 288
- 43
- Jun 26, 2016
-
Orillia,
ON_Canada
Very odd situation... I drove the car last summer, parked it for the winter, wanted to drive it this summer, tried to start it just now,... no spark. Started tracing the problem. Noticed my CEL was not ON. Accessed resources you guys graciously provided over the years here. Found this post: 1G basic ECU MPI circuit function ... Started tracing the problem as per instructions:
Edit #2: answering my question^^^, it would appear that when the key is in the ON position, there is continuity on ignition switch 6, 3, 4, 2 (so there should be power going to ECU pin #102, and #107)
- checked two fusible links on the battery terminal and 10Amp room fuse #19
- checked for battery voltage at ECU backup power pin #103 and MPI relay pin #10
- Measured ground continuity to ECU pins #106 (dont have #101) and MPI #6
- Couldnt get voltage on ECU pin #102, #107 even when cranking
- Shorted MPI pin #8 (el.harness) and got no voltage on pin #4 or #5
- what are the possible mistakes i made in measuring voltage on ECU pin # 102 and #107 and MPI pin #4 and #5 ?
- if i am correct and not getting power on those ^^^ four pins, what is my next step?
Edit #2: answering my question^^^, it would appear that when the key is in the ON position, there is continuity on ignition switch 6, 3, 4, 2 (so there should be power going to ECU pin #102, and #107)
You must be logged in to view this image or video.
Last edited: