Haltech No RPM signal
05-07-15, 06:44 PM
#1
At a red light car died. Got a laptop to see what's wrong, no RPM signal. Pulled the CAS and spun it to check. Think the wires came loose or something. Gonna go through the harness tonight and see if anything is wrong. Anything I should look for?
Sprint RE
Sprint RE
05-09-15, 07:52 AM
#3
Do a continuity test on all four wires between the ECU and the CAS. Also, with the ECU disconnected, check for continuity to ground and 12V+ on all four wires. It's possible one or more of the wires has shorted to ground or positive. If continuity checks out, try a different CAS. If you still have nothing, send the ECU in and have it tested. I've never heard of one that just stopped working on the crank/cam pickup like that but it's always possible.
05-09-15, 05:12 PM
#5
Rotary Enthusiast
Join Date: Aug 2006
Location: Melbourne FL/San Antonio TX/Okinawa Japan
Posts: 1,216
Likes: 0
Received 10 Likes
on
10 Posts
Try lowering the voltage threshold in the 100 to 1500 rpm range. Try half the voltage values. Seen a few loose rpm single when the CAS gets hot.
05-10-15, 12:29 PM
#7
He's asking you to check each of the CAS wires for continuity to ground and for evidence of 12 volts, which are two different things. One checks to see if any of the wires are accidentally grounded out and the other checks to see if any of the wires are accidentally receiving 12 volts.
Last edited by satch; 05-10-15 at 03:16 PM.
Trending Topics
05-10-15, 12:59 PM
#8
Ohh OK.
With the ECU disconnected from harness. I check each of the 4 CAS wires the yellow and green to the black chassis ground, the blk/white signal ground, and the 12v power.
There was NO continuity.
I attached the ecu to the harness and check again. There was some continuity with the trigger (-) to the ground ans the trigger (+) to the 12v.
With the ECU disconnected from harness. I check each of the 4 CAS wires the yellow and green to the black chassis ground, the blk/white signal ground, and the 12v power.
There was NO continuity.
I attached the ecu to the harness and check again. There was some continuity with the trigger (-) to the ground ans the trigger (+) to the 12v.
05-10-15, 08:00 PM
#9
Ohh OK.
With the ECU disconnected from harness. I check each of the 4 CAS wires the yellow and green to the black chassis ground, the blk/white signal ground, and the 12v power.
There was NO continuity.
I attached the ecu to the harness and check again. There was some continuity with the trigger (-) to the ground ans the trigger (+) to the 12v.
With the ECU disconnected from harness. I check each of the 4 CAS wires the yellow and green to the black chassis ground, the blk/white signal ground, and the 12v power.
There was NO continuity.
I attached the ecu to the harness and check again. There was some continuity with the trigger (-) to the ground ans the trigger (+) to the 12v.
05-11-15, 03:46 PM
#10
Checked the Red and blue. Red in both cords has continuity with the red 12V. And the Blue has continuity with ground.
It's supposed to be that way right? Talked to Haltech they said that the chip could have gone bad however unlikely that may be.
Wish I had another ECU to plug in and test real quick. Don't want to have to ship my ECU to Haltech.
It's supposed to be that way right? Talked to Haltech they said that the chip could have gone bad however unlikely that may be.
Wish I had another ECU to plug in and test real quick. Don't want to have to ship my ECU to Haltech.
05-27-15, 05:22 AM
#12
Getting my Sprint back from Haltech. The trigger chip was fried.
Anyway can somebody check out my maps specifically the timing map. Just want everything to be good before I get back at it.
https://drive.google.com/file/d/0Byf...ew?usp=sharing
Anyway can somebody check out my maps specifically the timing map. Just want everything to be good before I get back at it.
https://drive.google.com/file/d/0Byf...ew?usp=sharing
Thread
Thread Starter
Forum
Replies
Last Post
rotor_veux
2nd Generation Specific (1986-1992)
7
09-19-15 07:13 PM
The1Sun
1st Generation Specific (1979-1985)
7
09-18-15 07:13 PM
Farkel
3rd Generation Specific (1993-2002)
4
09-16-15 06:16 PM
The1Sun
1st Generation Specific (1979-1985)
0
09-07-15 10:21 PM