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 <<O>>  Difference Topic AddIABToP28 (r1.9 - 29 Jul 2006 - Home.M2Prelude)
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 <<O>>  Difference Topic AddIABToP28 (r1.8 - 21 Aug 2005 - Home.m2prelude)
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Remove: Q34

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 <<O>>  Difference Topic AddIABToP28 (r1.7 - 26 Jul 2005 - Home.blundar)
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READ CAREFULLY: The procedure to add IABs is different depending on how they are wired. One IAB wire will always run to the ECU, the other will run to either +12v or gnd. Choose the procedure to match how your car is wired! This is very important!

USDM ODB1 B18C: ( ECU sends ground, IAB wired to +12v )

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ODB2 & JDM B18C conversions: (signal is reversed)

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ODB2 & JDM B18C conversions: ( ECU sends +12v, IAB wired to GND )


 <<O>>  Difference Topic AddIABToP28 (r1.6 - 12 Jul 2005 - Home.m2prelude)
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IAB conversion...

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IAB conversion... (this is for Manual cars only, but an AUTO USDM ECU converted to manual will have all the parts you need present)

Remove: R135...11F0/1720 autos only R150...1980/LS only

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Remove: R135...11F0/1720 autos only R150...1980/LS only

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  • Jumper wire for OBD1 IAB control:

P28_IAB_OBD1.jpg

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%META:FILEATTACHMENT{name="P28_IAB_OBD1.jpg" attr="" comment="Jumper wire for OBD1 IAB control" date="1121190086" path="P28_IAB_OBD1.jpg" size="266030" user="m2prelude" version="1.1"}%


 <<O>>  Difference Topic AddIABToP28 (r1.5 - 12 Jul 2005 - Home.m2prelude)
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  • High side switch for OBD2 IAB control:
    P28_IAB_1.jpg

  • High side switch for OBD2 IAB control:
    P28_IAB_2.jpg

%META:FILEATTACHMENT{name="P28_IAB_1.jpg" attr="" comment="High side switch for OBD2 IAB control" date="1121176716" path="P28_IAB_1.jpg" size="364224" user="m2prelude" version="1.1"}% %META:FILEATTACHMENT{name="P28_IAB_2.jpg" attr="" comment="High side switch for OBD2 IAB control" date="1121176803" path="P28_IAB_2.jpg" size="212634" user="m2prelude" version="1.1"}%


 <<O>>  Difference Topic AddIABToP28 (r1.4 - 12 Jul 2005 - Home.m2prelude)
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obd2 conversions: (signal is reversed)

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ODB2 & JDM B18C conversions: (signal is reversed)

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  • cut control leg of IC15 short and solder signal carrying wire to it (thread wire through hole)
and solder other 515 X High Side Switch pins in place
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  • cut control leg of IC15 short and solder signal carrying wire to it (thread wire through hole)and solder other 515 X High Side Switch pins in place
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  • add Q17(A143)...already present on USDM auto 11F0/1720 (A5x, L5x, etc). Not present on EDM auto 11F0/1720 (G5x, etc).
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Pin A19 will be your IAB output on the OBD1 harness.


 <<O>>  Difference Topic AddIABToP28 (r1.3 - 19 Aug 2004 - Home.blundar)
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  • Q34(D1980? or C3225?)... already present on USDM auto 11F0/1720 (A5x, L5x, etc). Not present on EDM auto 11F0/1720 (G5x, etc). may use PCS trans: Q31(D1980?)
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  • Q34(D1780 or C3225?)... already present on USDM auto 11F0/1720 (A5x, L5x, etc). Not present on EDM auto 11F0/1720 (G5x, etc). may use PCS trans: Q31(D1780)

 <<O>>  Difference Topic AddIABToP28 (r1.2 - 19 Jul 2004 - Home.crxsirvtec)
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  • Q34(D1980? or C3255?)... already present on USDM auto 11F0/1720 (A5x, L5x, etc). Not present on EDM auto 11F0/1720 (G5x, etc). may use PCS trans: Q31(D1980?)
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  • Q34(D1980? or C3225?)... already present on USDM auto 11F0/1720 (A5x, L5x, etc). Not present on EDM auto 11F0/1720 (G5x, etc). may use PCS trans: Q31(D1980?)

 <<O>>  Difference Topic AddIABToP28 (r1.1 - 05 Mar 2004 - Home.blundar)
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%META:TOPICINFO{author="blundar" date="1078516726" format="1.0" version="1.1"}% Author: Deluded Date: 07-24-03 23:44

IAB conversion...

Add:

  • Q17(A143)...already present on USDM auto 11F0/1720 (A5x, L5x, etc). Not present on EDM auto 11F0/1720 (G5x, etc).
  • Q34(D1980? or C3255?)... already present on USDM auto 11F0/1720 (A5x, L5x, etc). Not present on EDM auto 11F0/1720 (G5x, etc). may use PCS trans: Q31(D1980?)
  • jumper from right hole of R135(trans side) to D13(arrow side)

Remove: R135...11F0/1720 autos only R150...1980/LS only

obd2 conversions: (signal is reversed)

  • above procedure not needed...
  • cut control leg of IC15 short and solder signal carrying wire to it (thread wire through hole)
and solder other 515 X High Side Switch pins in place

Use P72 code with knock disabled . Similar install on LS ecus.


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Revision r1.1 - 05 Mar 2004 - 19:58 GMT - Home.blundar
Revision r1.9 - 29 Jul 2006 - 05:20 GMT - Home.M2Prelude 		%WEBCOPYRIGHT%