SupaSupraSE
08-04-2005, 04:26 PM
The SAFC-2 is used by a lot of fellow na-t owners. While some use just the SAFC-2 and their MAF, others do the SAFC/VPC combination and ditch their MAF.
You must also note that the 1993.5-1995 supras, will wire up differently than those that are 1996-1998. This is due to the earlier models (93.5-95) being OBD1, while the older models (96-98) are OBDII.
Getting Started:
Go to the passenger side of the car. On the right side of the floor is a black plastic cover held in by a wedge screw. Push on the middle of the screw and pull it out, then pull out the side piece which is part of the door trim--it just pulls out and snaps in. Once that is removed pull back the carpet which will expose the ECU protective shield (the carpet is held in by two plastic screw wedges at the top). Use your sockets to remove the two nets holding the shield down and remove the shield. The ECU should now be exposed. Remove the last nut that is holding the ECU down. Then slip the end over the screw and pull the ECU down and it should be free. The top part of the ECU harness can be removed by pinching and pulling on it. The bottom harness needs to be unscrewed to be removed, either with a screwdriver or with your sockets. After unscrewing the harness pull it off the ECU and set the ECU out of the way. You may need to remove some electrical tape that is binding the wires, so you have complete access to them.
Now you can get started wiring your SAFC-2. Before we begin, you have to note the change between the OBD1 supras, and the OBD2.
The OBD1 1993.5-1995 supra will use the KARMEN sensor
The OBD2 1996-1998 supra will use the HOTWIRE sensor
*******FOR OBD1 (1993.5-1995) N/A's-************
-Use PINK wire, instead of YELLOW wire
-Use ORANGE wire, instead of WHITE wire.
-YELLOW and WHITE wire are NOT used
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IF YOU ARE OBD2, FOLLOW THESE STEPS EXACTLY AS THEY ARE WRITTEN. OBD1 READ DIRECTLY ABOVE FOR CHANGES YOU MAKE.
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1. Splice the GREEN wire (RPM) into 58
2. Splice the GRAY wire (Throttle) into 43
3.Cut wire 66 in half, leave yourself enough room to connect a wire to ECU harness.
4.Connect the YELLOW wire to the 66 wire connected TO the ECU harness.
5. Connect the WHITE wire to the 66 wire heading AWAY from the ECU harness.
6. Splice the BROWN wire (ground 1) into 69, close to the ecu.
7. Splice the BLACK wire (ground 2) into 69 at least 1cm away from the Brown wire.
8. Splice the RED wire (12V+) in to ECU wire 31.
9. PINK and ORANGE wires are not used.
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OK, Now you have all of the wiring done, double check all of your connections, reconnect the wiring harness to your ECU. Make sure all of those wires are still tight. Plug the harness into the S-AFC. Reconnect your battery cable. Turn the ignition to the ON position. The AFC should boot up and display A'PEXi, if screen did not light up, stop disconnect the battery and find out what went wrong. Most likely it is power or ground problem (or a loose ecu harness.)
If the unit Powers On, follow these steps:
First start off by Resetting the AFC. Many have often complained that their AFC does not show full throttle(%100), regardless if it is brand new. Go under [etc.] and press NEXT~>. Confirm "YES" when prompted "Init. All?" and press NEXT again, Now turn the ignition OFF and then back ON, and the unit should now be reset and ready.
Next enter the following basic settings:
1.-Go to [main] ~>[setting] ~> [3. TH-Point] ~> [Lo-94, Hi-95]
*2.-Go to [main] ~>[etc.] ~> [1. Sensor Type] ~> [1. Hot-Wire] ~> [in-12, Out-12] ~> [in-1, Out-1]* (SELECT KARMEN IF YOU ARE 93.5-95)
3.-Go to [main] ~>[etc.] ~> [2. Car Select] ~> [Cyl:6, Thr: UP]
4.-Go to [main] ~>[etc.] ~> [3. Graph scale] ~> [Ne = 7000rpm]
5.[Ne-POINT = 3500, 4000, 4500, 5000, 5500, 6000, 6500, 7000]
[Dec. -Air = NOT USED, unless you want to use it to compensate for venting your BOV to atmosphere]
Do not modify the low throttle settings. While at low throttle (in closed loop mode) the ecu will counteract any changes made and over time your long term fuel map will be modified. I recommend modifying your high throttle fuel curve on the dyno with an air/fuel ratio meter & egt gauge installed. For maximum power, one probably wants to run an air to fuel ratio of between 11:1 (rich) and 12.5:1 (lean) Do yourself a favor and pay a professional to tune it. If you lean your engine out, things can melt.
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BLUE WIRE MOD INFO
This allows you to read Oxygen Sensor Voltage on the AFC display. On the wiring harness for the AFC the blue wire is not normally used. The blue wire is meant for the second Mass Air Flow Meter on a Nissan 300ZX. You will connect this wire to the O2 sensor wire right at the ECU. To read the O2 sensor voltage, scroll down to and select the "etc." menu. Select the "Sensor Check". Of the three readings, O2 voltage will be the middle one (#2).
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VPC+AFC
If you are installing the VPC with the AFC, then install the AFC on the output wire of VPC
--------------------------------------------------------------------------
You must also note that the 1993.5-1995 supras, will wire up differently than those that are 1996-1998. This is due to the earlier models (93.5-95) being OBD1, while the older models (96-98) are OBDII.
Getting Started:
Go to the passenger side of the car. On the right side of the floor is a black plastic cover held in by a wedge screw. Push on the middle of the screw and pull it out, then pull out the side piece which is part of the door trim--it just pulls out and snaps in. Once that is removed pull back the carpet which will expose the ECU protective shield (the carpet is held in by two plastic screw wedges at the top). Use your sockets to remove the two nets holding the shield down and remove the shield. The ECU should now be exposed. Remove the last nut that is holding the ECU down. Then slip the end over the screw and pull the ECU down and it should be free. The top part of the ECU harness can be removed by pinching and pulling on it. The bottom harness needs to be unscrewed to be removed, either with a screwdriver or with your sockets. After unscrewing the harness pull it off the ECU and set the ECU out of the way. You may need to remove some electrical tape that is binding the wires, so you have complete access to them.
Now you can get started wiring your SAFC-2. Before we begin, you have to note the change between the OBD1 supras, and the OBD2.
The OBD1 1993.5-1995 supra will use the KARMEN sensor
The OBD2 1996-1998 supra will use the HOTWIRE sensor
*******FOR OBD1 (1993.5-1995) N/A's-************
-Use PINK wire, instead of YELLOW wire
-Use ORANGE wire, instead of WHITE wire.
-YELLOW and WHITE wire are NOT used
--------------------------------------------------------------------------
IF YOU ARE OBD2, FOLLOW THESE STEPS EXACTLY AS THEY ARE WRITTEN. OBD1 READ DIRECTLY ABOVE FOR CHANGES YOU MAKE.
--------------------------------------------------------------------------
1. Splice the GREEN wire (RPM) into 58
2. Splice the GRAY wire (Throttle) into 43
3.Cut wire 66 in half, leave yourself enough room to connect a wire to ECU harness.
4.Connect the YELLOW wire to the 66 wire connected TO the ECU harness.
5. Connect the WHITE wire to the 66 wire heading AWAY from the ECU harness.
6. Splice the BROWN wire (ground 1) into 69, close to the ecu.
7. Splice the BLACK wire (ground 2) into 69 at least 1cm away from the Brown wire.
8. Splice the RED wire (12V+) in to ECU wire 31.
9. PINK and ORANGE wires are not used.
--------------------------------------------------------------------------
OK, Now you have all of the wiring done, double check all of your connections, reconnect the wiring harness to your ECU. Make sure all of those wires are still tight. Plug the harness into the S-AFC. Reconnect your battery cable. Turn the ignition to the ON position. The AFC should boot up and display A'PEXi, if screen did not light up, stop disconnect the battery and find out what went wrong. Most likely it is power or ground problem (or a loose ecu harness.)
If the unit Powers On, follow these steps:
First start off by Resetting the AFC. Many have often complained that their AFC does not show full throttle(%100), regardless if it is brand new. Go under [etc.] and press NEXT~>. Confirm "YES" when prompted "Init. All?" and press NEXT again, Now turn the ignition OFF and then back ON, and the unit should now be reset and ready.
Next enter the following basic settings:
1.-Go to [main] ~>[setting] ~> [3. TH-Point] ~> [Lo-94, Hi-95]
*2.-Go to [main] ~>[etc.] ~> [1. Sensor Type] ~> [1. Hot-Wire] ~> [in-12, Out-12] ~> [in-1, Out-1]* (SELECT KARMEN IF YOU ARE 93.5-95)
3.-Go to [main] ~>[etc.] ~> [2. Car Select] ~> [Cyl:6, Thr: UP]
4.-Go to [main] ~>[etc.] ~> [3. Graph scale] ~> [Ne = 7000rpm]
5.[Ne-POINT = 3500, 4000, 4500, 5000, 5500, 6000, 6500, 7000]
[Dec. -Air = NOT USED, unless you want to use it to compensate for venting your BOV to atmosphere]
Do not modify the low throttle settings. While at low throttle (in closed loop mode) the ecu will counteract any changes made and over time your long term fuel map will be modified. I recommend modifying your high throttle fuel curve on the dyno with an air/fuel ratio meter & egt gauge installed. For maximum power, one probably wants to run an air to fuel ratio of between 11:1 (rich) and 12.5:1 (lean) Do yourself a favor and pay a professional to tune it. If you lean your engine out, things can melt.
------------------------------------------------------------------------
BLUE WIRE MOD INFO
This allows you to read Oxygen Sensor Voltage on the AFC display. On the wiring harness for the AFC the blue wire is not normally used. The blue wire is meant for the second Mass Air Flow Meter on a Nissan 300ZX. You will connect this wire to the O2 sensor wire right at the ECU. To read the O2 sensor voltage, scroll down to and select the "etc." menu. Select the "Sensor Check". Of the three readings, O2 voltage will be the middle one (#2).
--------------------------------------------------------------------------
VPC+AFC
If you are installing the VPC with the AFC, then install the AFC on the output wire of VPC
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