How Do I adjust Idle sc400?
#1
Rookie
Thread Starter
Join Date: Jan 2007
Location: FL
Posts: 74
Likes: 0
Received 0 Likes
on
0 Posts
How Do I adjust Idle sc400?
Removed and Cleaned Idle Control Valve now my idle is way too high how do I adjust the idle? Is it from the TPS? rotating it? There's two sensors which one would it be?
Last edited by cjgsxr2002; 05-20-10 at 07:31 AM. Reason: wrong
#3
Why did you remove the IACV? Were you having issues prior to the cleaning ... or were you just bored and were looking for something to do?
The IACV is controlled by the main ECU. Are you having any other issues as well or is it just the idle is too high?
#4
Rookie
Thread Starter
Join Date: Jan 2007
Location: FL
Posts: 74
Likes: 0
Received 0 Likes
on
0 Posts
I read that you can clean the IACV to stop slight hesitation so I did. No other issues no codes just idle is too high. Iread that this happens when you clean them and that you have to adjust the idle. I know theres a screw on other cars to adjust idle from the throttle body but I can't find it.
#6
Lexus Champion
iTrader: (4)
There are a couple of things you can try. one is to reset the ECU by disconnecting the battery for several minutes, that may help. You stated you adjusted the idle, so did you find the idle set screw? Just loosen the nut and slowly turn the screw to adjust idle. BTW, it is mounted on the back, off the throttle body, between it and the firewall. The two actuators control the two different throttle plates. The one farthest from the intake controls your traction control. The one closer to the intake is your throttle.
Good luck!
Good luck!
Last edited by SC400TT; 05-20-10 at 01:11 PM.
Trending Topics
#8
Driver School Candidate
Join Date: Nov 2003
Location: Canada
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
Here are the two TPS sensors side by side
The TPS on the left controls Traction the other controls EFI.
The part numbers:
EFI 89452-50020 (on the right)
Trac 8942-33010
1994 SC400
I'm currently getting the following:
soon after start-up the side by side check engine and "trac off" lights come on. In addition the "Trac" light also comes on (traction control no longer works at that point) and stays on unless I turn off the engine and restart. When I do that it stays off and traction control works again. The dealer told me that he's reading code 41 and that part number 89452-22090 may be required. I have yet to confirm if this part replaces the EFI or the Traction TPS unit.
Hope this helps
I know I'm responding to an old post but adding the answer will likely help others going forward - as it did me.
The part numbers:
EFI 89452-50020 (on the right)
Trac 8942-33010
1994 SC400
I'm currently getting the following:
soon after start-up the side by side check engine and "trac off" lights come on. In addition the "Trac" light also comes on (traction control no longer works at that point) and stays on unless I turn off the engine and restart. When I do that it stays off and traction control works again. The dealer told me that he's reading code 41 and that part number 89452-22090 may be required. I have yet to confirm if this part replaces the EFI or the Traction TPS unit.
Hope this helps
I know I'm responding to an old post but adding the answer will likely help others going forward - as it did me.
#10
Lexus Champion
Thread
Thread Starter
Forum
Replies
Last Post
b2p1986
ES - 1st to 4th Gen (1990-2006)
0
09-27-12 10:48 AM
andres-eh2
RX - 1st Gen (1999-2003)
8
10-22-09 06:51 AM