Convert OBDI.5 to OBDII: Engine bay harness fixes Parts list
Posted: Thu Aug 13, 2009 8:58 am
Well here is a short write up on how to modify the 96 OBDII harness to work in a 94 or 95 car without changing the interior harness. This gives you the ability to tune a 94-95 car with DHP or HPTuners. Info needed on tuning PM me.
EDIT I needed to update this to include info on other parts needed to complete this swap to eliminate any and all questions about it.
1996 Parts needed to swap on your 94-95 Beretta
-ECM Bracket
-Glove Box
-Fresh Air Vent
-EGR and possibly Pipe depending on what setup you had before.
-96+ Upper intake, Goes along with the above, if you have a stock 3100 you will need the 96 3100 upper to use the 96 EGR
-Automatic transmission range selector switch located on selector shaft of trans.
-Maf Sensor
-Knock Sensor
-ABS ECM in firewall
-ABS Motors, and or full 96+ Master Cylinder if you intend on keeping your ABS system.
-96+ 3pin temp sensor (if your already 3400 you may have converted to this.)
-Purge Valve setup below coils there is a new Flow valve that can not be purchased new from anyone so you need to find it at a JY to add it in.
-Depending on year you may need the solenoid brackets that mount to the strut towers, I know 94 had them on the firewall.
-Injector wiring harness if you want to convert to the 3 pin temp sensor, other wise you can just use the 95 one and re-route the temp wiring to what your doing. 96 the 3 pin wire is part of the injector harness.
-And of course 1996 or 1997 ECM... 96 has to be flashed with a Beretta Bin, and 97 has to be flashed with a corrected Venture bin to run properly. Stock Venture bin is not setup right
Now the wiring,
Some may not feel comfortable doing this but others can accomplish it easily.
There are three fixes you need to do to make the harness work on a 94 or 95 interior dash harness.
Re-route Tach signal wire from pin 9 on the ECM connector to pin C on the ICM connector. (IF YOU HAVE A TACH DASH) This is not necessary if you do not have or ever want a tach cluster.
Re-route Pin G5 on the driver's side body harness connector to Pin P on the passenger side body harness connector. This is for the ABS light to work on the dash
Tap pin F4 on the drives side body harness and connect that to the engine harness side of the wire that was on Pin P on the passenger side body harness, wire is left over from the previous step. This is routing a power source from the driver side to the MAF power wire.
Then you can add some wires that tap off of the passenger side body harness connector to wire in your com port, I'll add pics of that part later.
The steps: (all relating pictures below the step being described)
Find Pin 9 on the clear ECM connector, WHITE WIRE.
Cut it 2 inches back from the connector just to leave some extra if you ever want to hook up a 0-5v tach setup.
Pull the wire back through the passenger side firewall connector.
Pull it back to where the wires for the ICM come out of the main harness.
Route it up to the ICM connector to determine length of wire needed.
Pull a connector from a un-used connector you have lying around, remember it has to be the same type of pin, TPS, Crank position, IAC, and a few others are all the same, I cut up a old crank position connector to get the pin out of it.
I cleaned it up trimmed back the wires, threaded the white wire through the ICM connector first at PIN C, and then put the pin on the wire and soldered it together.
I then pulled the wire back into place clipping the pin into the connector.
Cut the white wire on the driver's side body harness connector, PIN G5 AKA top row second from left, Looking at the back side of connector, as pictured, (natural wire curve aiming down)
Pull this wire back through the harness to the ABS ECM plug.
Stage this wire there for now.
EDIT I needed to update this to include info on other parts needed to complete this swap to eliminate any and all questions about it.
1996 Parts needed to swap on your 94-95 Beretta
-ECM Bracket
-Glove Box
-Fresh Air Vent
-EGR and possibly Pipe depending on what setup you had before.
-96+ Upper intake, Goes along with the above, if you have a stock 3100 you will need the 96 3100 upper to use the 96 EGR
-Automatic transmission range selector switch located on selector shaft of trans.
-Maf Sensor
-Knock Sensor
-ABS ECM in firewall
-ABS Motors, and or full 96+ Master Cylinder if you intend on keeping your ABS system.
-96+ 3pin temp sensor (if your already 3400 you may have converted to this.)
-Purge Valve setup below coils there is a new Flow valve that can not be purchased new from anyone so you need to find it at a JY to add it in.
-Depending on year you may need the solenoid brackets that mount to the strut towers, I know 94 had them on the firewall.
-Injector wiring harness if you want to convert to the 3 pin temp sensor, other wise you can just use the 95 one and re-route the temp wiring to what your doing. 96 the 3 pin wire is part of the injector harness.
-And of course 1996 or 1997 ECM... 96 has to be flashed with a Beretta Bin, and 97 has to be flashed with a corrected Venture bin to run properly. Stock Venture bin is not setup right
Now the wiring,
Some may not feel comfortable doing this but others can accomplish it easily.
There are three fixes you need to do to make the harness work on a 94 or 95 interior dash harness.
Re-route Tach signal wire from pin 9 on the ECM connector to pin C on the ICM connector. (IF YOU HAVE A TACH DASH) This is not necessary if you do not have or ever want a tach cluster.
Re-route Pin G5 on the driver's side body harness connector to Pin P on the passenger side body harness connector. This is for the ABS light to work on the dash
Tap pin F4 on the drives side body harness and connect that to the engine harness side of the wire that was on Pin P on the passenger side body harness, wire is left over from the previous step. This is routing a power source from the driver side to the MAF power wire.
Then you can add some wires that tap off of the passenger side body harness connector to wire in your com port, I'll add pics of that part later.
The steps: (all relating pictures below the step being described)
Find Pin 9 on the clear ECM connector, WHITE WIRE.
Cut it 2 inches back from the connector just to leave some extra if you ever want to hook up a 0-5v tach setup.
Pull the wire back through the passenger side firewall connector.
Pull it back to where the wires for the ICM come out of the main harness.
Route it up to the ICM connector to determine length of wire needed.
Pull a connector from a un-used connector you have lying around, remember it has to be the same type of pin, TPS, Crank position, IAC, and a few others are all the same, I cut up a old crank position connector to get the pin out of it.
I cleaned it up trimmed back the wires, threaded the white wire through the ICM connector first at PIN C, and then put the pin on the wire and soldered it together.
I then pulled the wire back into place clipping the pin into the connector.
Cut the white wire on the driver's side body harness connector, PIN G5 AKA top row second from left, Looking at the back side of connector, as pictured, (natural wire curve aiming down)
Pull this wire back through the harness to the ABS ECM plug.
Stage this wire there for now.