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06-03-2010, 11:12 PM | #1 |
Scooby Newbie
Member#: 79339
Join Date: Jan 2005
Chapter/Region:
RMIC
Location: Westminster, CO
Vehicle:2002 EJ257 6spd WRX Midnight Black |
STi swap wiring question
Swapping 04 STi wiring into an 02 wrx. What do I need to do to eliminate the check engine light for the missing fuel pressure sensor and diff temp sensor? can i just use resistors like on O2 sensors?
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06-03-2010, 11:45 PM | #2 |
Scooby Specialist
Member#: 62408
Join Date: May 2004
Chapter/Region:
South East
Location: GWR, Florida
Vehicle:2002 wrx w/ STi guts 174k miles on Mobil 1 |
The fuel pressure is related to the evap system, which I believe is the same on both cars, I could be wrong though.
For the diff temp.. Did you use the entire 04 harness with the DCCD controller? |
06-04-2010, 12:28 AM | #3 |
Scooby Newbie
Member#: 79339
Join Date: Jan 2005
Chapter/Region:
RMIC
Location: Westminster, CO
Vehicle:2002 EJ257 6spd WRX Midnight Black |
The STi has a separate fuel pressure sensor than the 02. I used the entire harness excess gas tank section. I don't have the DCCD controller, but i don't need it because i am using stock trans.
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06-04-2010, 11:49 AM | #4 |
Scooby Specialist
Member#: 62408
Join Date: May 2004
Chapter/Region:
South East
Location: GWR, Florida
Vehicle:2002 wrx w/ STi guts 174k miles on Mobil 1 |
The reason I asked about the DCCD controller is because it's tied into the main ecu, and will probably go into "safe" mode if it sees a high temp in the trans or rear diff, which may be what's causing the temp code.
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06-04-2010, 12:21 PM | #5 |
Scooby Newbie
Member#: 79339
Join Date: Jan 2005
Chapter/Region:
RMIC
Location: Westminster, CO
Vehicle:2002 EJ257 6spd WRX Midnight Black |
My rear diff does not have a temp sensor. My harness does, it will be expecting some sort of signal, that's what I am trying to get around.
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06-04-2010, 12:30 PM | #6 |
Scooby Specialist
Member#: 62408
Join Date: May 2004
Chapter/Region:
South East
Location: GWR, Florida
Vehicle:2002 wrx w/ STi guts 174k miles on Mobil 1 |
You have the front harness, or the rear harness also?
I'm trying to remember where the rear diff sensor wire tied in (DCCD harness or main ecu harness). Generally leaving it unplugged will mean "cold" and grounding it will be "max hot", but it could be backwards. I think there are different codes for trans diff temp and rear diff temp. I have a rear diff sensor somewhere. I could always ohm it out for you and just use a resistor on the harness. |
06-04-2010, 02:25 PM | #7 | |
Scooby Newbie
Member#: 79339
Join Date: Jan 2005
Chapter/Region:
RMIC
Location: Westminster, CO
Vehicle:2002 EJ257 6spd WRX Midnight Black |
Quote:
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06-04-2010, 02:32 PM | #8 |
Scooby Specialist
Member#: 62408
Join Date: May 2004
Chapter/Region:
South East
Location: GWR, Florida
Vehicle:2002 wrx w/ STi guts 174k miles on Mobil 1 |
It would depend on the resistance of the sensor is at a "normal" temperature. Too cold, and it may act funny, and too hot it will throw the light.
Figure that one out, and you're in. I can tell you the resistance of the rear diff sensor sitting on the table if that helps, and if I can find it. |
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