Haltech Forum Area is for discussing Haltechs

Haltech E8 to Mazda CAS Wiring? ECU not seing RPM

Thread Tools
 
Search this Thread
 
Old 11-04-07, 07:57 PM
  #1  
Down for the count...

Thread Starter
iTrader: (7)
 
Comitatus's Avatar
 
Join Date: Jan 2002
Location: Cincinnati, OH
Posts: 806
Likes: 0
Received 0 Likes on 0 Posts
E8 to Mazda CAS Wiring? ECU not seing RPM

Can someone please verify the wiring of an E8 to the Mazda Factory CAS?

I'm pretty sure I have it wired correctly, but my ECU is not seing RPM's during cranking.

I pulled the CAS out and spun it by hand as well to no avail. I tried a different CAS today as well, and still no dice.

Can anyone make some suggestions? I'm pretty confident that all the trigger and ignition settings are correct as well.
Old 11-04-07, 08:41 PM
  #2  
EFI Tech Wannabe

iTrader: (1)
 
Claudio RX-7's Avatar
 
Join Date: Sep 2003
Location: D.R., USA, the world...
Posts: 2,405
Likes: 0
Received 4 Likes on 4 Posts
Did you set the trigger settings correctly?
Old 11-04-07, 09:41 PM
  #3  
Down for the count...

Thread Starter
iTrader: (7)
 
Comitatus's Avatar
 
Join Date: Jan 2002
Location: Cincinnati, OH
Posts: 806
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Claudio RX-7
Did you set the trigger settings correctly?
Yes, pretty sure.

Multi-tooth Rotary
Reluctor
Reluctor
Falling
Falling
All gains at 0.

Then tried custom rotary with number of teeth at 24.
Old 11-04-07, 09:56 PM
  #4  
EFI Tech Wannabe

iTrader: (1)
 
Claudio RX-7's Avatar
 
Join Date: Sep 2003
Location: D.R., USA, the world...
Posts: 2,405
Likes: 0
Received 4 Likes on 4 Posts
Originally Posted by Comitatus
Yes, pretty sure.

Multi-tooth Rotary
Reluctor
Reluctor
Falling
Falling
All gains at 0.

Then tried custom rotary with number of teeth at 24.
Trigger type is Multitooth 24+1 full cycle, like you said, reluctor reluctor, falling falling, then the trigger filter put it at 1 and the gain at 2. Im sure that will prolly fix it.
Old 11-04-07, 10:15 PM
  #5  
Down for the count...

Thread Starter
iTrader: (7)
 
Comitatus's Avatar
 
Join Date: Jan 2002
Location: Cincinnati, OH
Posts: 806
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Claudio RX-7
Trigger type is Multitooth 24+1 full cycle, like you said, reluctor reluctor, falling falling, then the trigger filter put it at 1 and the gain at 2. Im sure that will prolly fix it.
I have the Multitooth option and Custom Rotary 1 & 2 options.

Where do I input the 24+1 full cycle. That has me confused a bit.

I'll set the gains to those values as well.

Can you verify the wiring from the Harness to the Mazda CAS for me?

Right now, I have the following:

Mazda CAS - E8 Trigger Harness
Red -------> Yellow
Green ------> Green
White -----> Blue
White/Blk-----> Blue
(Red = 12V+ not used)

Last edited by Comitatus; 11-04-07 at 10:30 PM.
Old 11-05-07, 08:48 AM
  #6  
Down for the count...

Thread Starter
iTrader: (7)
 
Comitatus's Avatar
 
Join Date: Jan 2002
Location: Cincinnati, OH
Posts: 806
Likes: 0
Received 0 Likes on 0 Posts
I'll be trying a new firmware this evening, and see how it goes.
Old 11-05-07, 01:39 PM
  #7  
Lives on the Forum

 
RETed's Avatar
 
Join Date: Feb 2001
Location: n
Posts: 26,664
Likes: 0
Received 16 Likes on 15 Posts
Oops, nevermind...

Can you check with the comm program connected to see if you get any RPM reading with the engine cranking?

A quick and dirty test is to pull the CAS out of the engine, turn key ON, and then spin the CAS by hand...


-Ted

Last edited by RETed; 11-05-07 at 01:49 PM.
Old 11-05-07, 01:50 PM
  #8  
****** of disaster

iTrader: (1)
 
thetech's Avatar
 
Join Date: Aug 2001
Location: Santa Monica, CA
Posts: 1,115
Likes: 0
Received 0 Likes on 0 Posts
I ground the CAS to the 2 4-core wires on my E11v2 and it sees RPM fine. Try playing with the gain and motronic filter settings if nothing else works - this fixed this same problem on my other E6X.
Old 11-05-07, 06:54 PM
  #9  
Down for the count...

Thread Starter
iTrader: (7)
 
Comitatus's Avatar
 
Join Date: Jan 2002
Location: Cincinnati, OH
Posts: 806
Likes: 0
Received 0 Likes on 0 Posts
I just loaded in the new firmware, and now I have signal.

Settings/Gains are on par with what Claudio recommended.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Queppa
New Member RX-7 Technical
8
09-02-18 09:53 AM
The Shaolin
2nd Generation Specific (1986-1992)
9
09-14-15 07:50 PM
stickmantijuana
MoTeC
5
09-10-15 07:58 PM
CaptainKRM
2nd Generation Specific (1986-1992)
14
08-26-15 09:52 PM



Quick Reply: Haltech E8 to Mazda CAS Wiring? ECU not seing RPM



All times are GMT -5. The time now is 01:22 AM.