1989 Honda Prelude 2.0si DOHC temp sensor wiring

Tiny
HENRYHEPBURN
  • MEMBER
  • 1989 HONDA PRELUDE
  • 4 CYL
  • 2WD
  • MANUAL
  • 185,000 MILES
I have two temp sensors near thermostat in addition to guage sensor. High and low sensor I believe. I need to get the wiring straight to the sensor plugs, it's been reworked several times and the colors don't match the plugs that replaced the old ones. Is there a schematic that I can download from the net, I get a code on ecu 9-6, no check engine light! Thanks
Monday, March 30th, 2009 AT 9:42 AM

5 Replies

Tiny
JAMES W.
  • MECHANIC
  • 2,394 POSTS
Is your engine fuel injected or carbed? It makes a difference in the wiring diagrams. Please advise.
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Monday, March 30th, 2009 AT 11:53 AM
Tiny
HENRYHEPBURN
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  • 14 POSTS
Fuel Injected!
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Monday, March 30th, 2009 AT 11:55 AM
Tiny
JAMES W.
  • MECHANIC
  • 2,394 POSTS
Well, here we go. The diagrams for your car are not very clear. BUT, I hope this will help;
Gauge sender Single red wire.
Temp sensor for EFI yellow W/Grn & White W/Grn
Temp sensor ECM yellow W/Grn & White W/Grn
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Monday, March 30th, 2009 AT 9:38 PM
Tiny
HENRYHEPBURN
  • MEMBER
  • 14 POSTS
Thank you! I was surprised to hear that the temp sensors are the same color, perhaps the same, because my two sensors are differnt colors with different numbers on them. I'll have to look into that. Thanks again!
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Monday, March 30th, 2009 AT 9:56 PM
Tiny
JAMES W.
  • MECHANIC
  • 2,394 POSTS
As I mentioned, my diagrams weren't very good. The only difference in the sensors is calibration. If you happen to hook them up backwards it won't damage anything, you'll just have to switch them around if you have performance problems.
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Monday, March 30th, 2009 AT 10:43 PM

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