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AEM FIC6 Vtec control/O2 control

Old 09-01-2011, 11:55 PM
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AEM FIC6 Vtec control/O2 control

I am pretty new to this forum and pls bear with me.
Also pls excuse my English.

I recently got the AEM FIC6 and I am tring to do the wiring by myself.(sort of impossible for me to get the bloomslang harness, different ECU pinout with USDM Fit GD3).

Vtec out:
On the 24pin connector, the pin16 is white color with name of 'switched 12VDC output' on the instruction. But when I check out the wires/connectors, the letters of 'Vtec out' are printed on the white wire.

I understand that the swithced 12V output could be used to control the vtec, but how to do the wiring? should I just tap the 'Vtec out' white wire to the factory vtec wire? The instruction only shows to connect the white wire to the 'low current'relay/solenoid', which makes me confused.

Sencond question:
There are O21+ and O22+ on the FIC wire harness, should I just use the O21+ wire to tap on the primary O2 sensor? what O22+ for? For V shape engine?

Do I need the 1k 1/4w resistor when I do the O2 wiring? I ask this because I am not sure if my Chinese Version fit is with a wideband primary O2 or not. I assume it is narrowband(4p connector) as some one told me the wideband O2 normally has 5 wires(5p connector). I just want to confirm this.

Thank you in advance.
Old 09-02-2011, 03:45 AM
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I was searching through google and I hope this helps - Free downloadable Honda Acura Factory Service Manuals by HELMS
Old 09-02-2011, 10:48 AM
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Thanks guaiifit anyway,

But I have all the factory service manual already and I know excatly how each wire fuction in the ECU.

To make things more clear, my questions are:

1. How to connect the FIC 'vtec out'(or called 'switched 12VDC out)wire to the stock ECU wire harness?
2. Is my stock primary O2 sensor a narrowband?(I assume it is as I only have a 4pin connector for my primary O2 sensor while others told me the wideband should have a 5pin connector on the O2 sensor)
3. If it is a narrowband, do I need the 1k 1/4w resistor for the connection?
4. Should I connect the FIC 'O21+' wire to the primary O2 sensor? Then what the FIC 'O22+' wire for?
Old 09-04-2011, 01:27 AM
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Just get some updates:
1. I still do not know how to wire the 'vtec out' cable from the FIC to the ECU wire?

1. I fairly certain that my GD3 1.5MT is with a narrowband primary O2 in China.
2. So it seems that I need the 1k 1/4w resistor wiried into the O2 signal as the AEM FIC instruction shows.
3. I fairly certain that I only need to use the O21+ wire to be tapped to the signal of my primary narrowband O2 sensor.

Still hope someone could help with the unsolved question.
Old 10-25-2011, 06:24 AM
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You don't need to wire it to anything. It's an optional switched 12v wire that can be programmed to come on at set rpm, boost, throttle, etc. You don't need it to tune the car. (unless you get bored and want to play with vtec threshold)
Old 02-09-2013, 07:55 PM
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So the 12 dc switch is for turning vtec on/off right?
If so how can someone set it to a desired rpm?
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