Jump to content
Bossdaddy

2001 Honda Foreman 450 ES, shifting problems

Recommended Posts

Ok good, I have another test that I am trying to figure out on a spare wiring harness that I have. Be back in a bit. Go ahead Mel if you have anything for him.

Share this post


Link to post
Share on other sites
 

Key off -- 16p ECM connector (harness side) check for continuity Bl/O to neg. of battery = what?

Key off -- 16p ECM connector (harness side) check continuity O to G/Bu wire = what?

Share this post


Link to post
Share on other sites
 
4 minutes ago, Melatv said:

Key off -- 16p ECM connector (harness side) check for continuity Bl/O to neg. of battery = what?

Key off -- 16p ECM connector (harness side) check continuity O to G/Bu wire = what?

 

According to the wiring diagram I am using that test should read:

 

Key off -- 5p ECM connector (harness side) check for continuity Bl/O to neg. of battery = what?

Key off -- 5p ECM connector (harness side) check continuity O to G/Bu wire = what?

  • Like 1

Share this post


Link to post
Share on other sites
 
 

Yes that's the 5P ECM connector not 16P ECM connected

Share this post


Link to post
Share on other sites
 
1 minute ago, Bossdaddy said:

16 p plugged in?

NO

Share this post


Link to post
Share on other sites
 

I think we are chasing the same thing right now Mel.... I was trying to figure out a test (using a spare wiring harness that I have) that would verify that the ECM is activating the relay coil through the Bl/O wire and also test that the relay is transferring battery voltage from the R/W entering the relay, to the R/Y exiting the relay.

 

I didn't come up with a test solution that doesn't involve poking through the insulation of those wires though.... 😞

 

  • Like 1

Share this post


Link to post
Share on other sites
 
 
3 minutes ago, Bossdaddy said:

16 p unplugged, 5 p bl/o to bat neg reads 105, o to g/b reads 0.00. 

That's good -- both of us doing some heavy thinking now

Share this post


Link to post
Share on other sites
 
 

My night to cook supper -- check with you later

  • Like 1

Share this post


Link to post
Share on other sites
 

Yup! Thanks Mel! Shouldn't the Orange to Green/Blue continuity test measure resistance though, rather than 0.00 ohms, since that test measures resistance through the shift motor? I would guess that the shift motor should measure a few ohms resistance?

  • Like 1

Share this post


Link to post
Share on other sites
 
 
 

Well I just checked resistance through a shift motor that I have and I got 0.7 ohms. So Bossdaddy, your meter reading is good.

 

We are getting down to the nitty gritty now.... it is looking like the ECM have failed. But there is one or two more tests that I'd like you to make before we call it, just in case something crazy & don't make any sense have happened.

 

With the 5p ECM connector plugged in, key turned off, 16p ECM connector unplugged, check continuity between the Green/Red wire inside the 16p ECM connector to ground. While the transmission is in neutral that wire should show no continuity.

  • Like 1

Share this post


Link to post
Share on other sites
 
 
 

The wire is a light shade of green with red stripe. See the orange arrow that I have drawn on your photo.

 

311ADC93-0AAB-4925-B663-4CC57835858B.png

Share this post


Link to post
Share on other sites
 

Meter set on 200 the red probe on g/r connector and black hooked to battery neg post reading was 17.5

Share this post


Link to post
Share on other sites
 

I am sorry, I made a  mistake on wire color Bossdaddy. Rather than Green/Red the correct wire color is Grey/Red. So lets try that test again...

 

With the 5p ECM connector plugged in, key turned off, 16p ECM connector unplugged, check continuity between the Grey/Red wire inside the 16p ECM connector to ground. While the transmission is in neutral that wire should show no continuity.

  • Like 1

Share this post


Link to post
Share on other sites
 
 

Great! We have just two more tasks to go then we gotta make the call on the ECM.

 

You may have done this one already, but if not find the wiring harness frame ground where it attaches to the frame with a bolt. Remove the bolt and make sure that the frame is not rusty under it. If it does not look clean shine the frame up around that ground bolt and then tighten the harness ground back down.

 

There are 3 green wires and 1 green/white wire in that ground spade. See the pic:

 

frame-ground.png

Share this post


Link to post
Share on other sites
 
 
1 minute ago, Bossdaddy said:

Where is this located?

 

I don't remember... I think that it is near the steering head, on the left side, in the front part of the frame though. Check the area where the harness connectors clip to the frame on the left side.

Share this post


Link to post
Share on other sites
 

Here are those ground wires exiting the wiring harness near the connectors on the left side.

 

1995625609_Gregswiring.png

Share this post


Link to post
Share on other sites
 

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×
×
  • Create New...