• Emc request does not match fan turn on temp
  • Emc request does not match fan turn on temp
  • Emc request does not match fan turn on temp
  • Emc request does not match fan turn on temp

Thanks Thanks:  0
Likes Likes:  0
Dislikes Dislikes:  0
Results 1 to 3 of 3
  1. #1
    Member
    Join Date
    Apr 2009
    Location
    Wisconsin
    Posts
    21
    Corvette(s)
    1989 coupe
    Post Thanks / Like
    Rides
    0

    Default Emc request does not match fan turn on temp

    ECM requests fan less than 210 but fan does not come on until 227. If fan does not engage at ECM request is the relay switch bad?

  2. #2
    Member
    Join Date
    Apr 2006
    Location
    south florida
    Posts
    403
    Corvette(s)
    1993 Coupe, Bright Aqua
    Post Thanks / Like
    Rides
    0

    Default

    Quote Originally Posted by k2bob View Post
    ECM requests fan less than 210 but fan does not come on until 227. If fan does not engage at ECM request is the relay switch bad?
    If the fan comes on when it hits 227 the relay, wiring and fan are all working. Verify the circuit from the ECM is actually grounding the relay when it calls for fan on at 210.

  3. #3
    Member gmjunkie's Avatar
    Join Date
    Nov 2004
    Location
    Old Fort NC/Vero Beach FL
    Posts
    4,416
    Corvette(s)
    03 Z-51,78 L82 Coupe
    Post Thanks / Like
    Rides
    0

    Default

    Quote Originally Posted by k2bob View Post
    ECM requests fan less than 210 but fan does not come on until 227. If fan does not engage at ECM request is the relay switch bad?
    If the A/C is on 1 cooling fan should be running with it,and the second should kick on at approximately 226-228 deg!

    If the A/C isn't on,the primary cooling fan should kick on at 226-228 deg. and the secondary should kick on at 233-236 deg.!

    Thats the way the factory have them set up!!You don't have a problem if this is the way yours is working

    It's got so it seems to me that the Internet has created a lot more Horses A$$'s than we have Horses!
    junk!~!!
    Founding Member: 10 Corvettes Anonymous


Similar Threads

  1. LT1,LT4,LS1,LS6.... Whats the difference?
    By sscam69 in forum LT4 Forum
    Replies: 28
    Last Post: 04-29-06, 03:06 PM
  2. cooling fan ect.
    By LOUVETTE in forum C4 Technical and Performance
    Replies: 8
    Last Post: 12-24-02, 05:28 AM
  3. Cleaning IAC, Radio Relay & Fan Switch
    By klyons in forum C4 Technical and Performance
    Replies: 5
    Last Post: 12-06-02, 03:46 PM
  4. Close Call
    By Dave L. in forum C3 Technical and Performance
    Replies: 57
    Last Post: 12-02-02, 07:27 AM
  5. Cooling fan temp
    By Dcalebaugh in forum C4 Technical and Performance
    Replies: 4
    Last Post: 09-14-02, 12:29 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •