I have a JDM Ver8 Engine, JDM Ver8 Engine harness, JDM Version 8 ECU

With a JDM Ver7 Chassis harness installed in a GC8.

Problem:

Throwing codes: P1309 & P1307

Everything seems to work fine except for AVCS, the wiring to the solenoids are correct from the ECU (hence why Ver8 ECUs worth with Ver7 engines and wiring)

But the wiring for the 2 extra AVCS cam sensors aren't there.

I'm trying to figure out what the pins are at the engine harness.

I only found the ECM I/O pinouts for Ver8 so far (these are the USDM connector/terminal equavelents but it simifies ranther than just listing numbers)

AVCS Cam angle sensor (L) B84 9

AVCS Cam angle sensor (L) B84 15

AVCS Cam angle sensor (R) B84 1

AVCS Cam angle sensor (R) B84 3

Or for that matter where exactly are the AVCS cam sensors? So I can trace back from the sensors if need be and then run new shielded wires.

Thanks in advance,
-Tim

Question, why do you have a V7 chasis harness while you have the JDM V8 engine? Did you hack up the V8 chasis for the engine wiring? If so, to me there is no point putting in the V7 chasis harness.

By chassis harness I mean everything from the ECM to the connectors for the engine harness.

I ended up buying the Ver7 STi harness later because I didn't get one with the engine as it was supposed to go into a new age WRX where you don't need the connecting harness.

I'm suprised this isn't already covered by people who even have it in new age WRXs.

Wonder if there is some other way around it or if something with the tumbler valves corresponds correctly...

Who knows.

Atleast I figured out my o2 sensor issues so I can get dyno tuned today even without "AVCS on!" :D

-Tim

If you using a V7 engine harness on a JDM V8, you shouldn't have to wire any of the ACVS since its the same. Only thing that is different is the V8 has an air temp sensor that the V7 does not have.

The V8 cam sensors are a hall effect type while the earlier suby cam sensors are a VRS type. Dig up a schematic for a USDM STi V8 and the sensor pinout will be the same. VRS sensors are 2 wire while hall effect switches are 3 wire. You will need to run a power/ground to each sensor and then use one of the wires already in the harness for the signal.

The V8 cam sensors are a hall effect type while the earlier suby cam sensors are a VRS type. Dig up a schematic for a USDM STi V8 and the sensor pinout will be the same. VRS sensors are 2 wire while hall effect switches are 3 wire. You will need to run a power/ground to each sensor and then use one of the wires already in the harness for the signal.



He has a JDM V8.

The V8 cam sensors are a hall effect type while the earlier suby cam sensors are a VRS type. Dig up a schematic for a USDM STi V8 and the sensor pinout will be the same. VRS sensors are 2 wire while hall effect switches are 3 wire. You will need to run a power/ground to each sensor and then use one of the wires already in the harness for the signal.

Thanks for the info.

Yeah I was talking to Jeff Perrin today about wiring it up correctly, similar to what you're saying and I think I got the jist of how to fix it.

-Tim

Okay forget what no-coast-punk said, you don't have a USDM motor and you aren't using USDM anything.

I would bet 99% that you are missing the two pigtail connectors that connect the AVCS cam sensors to the engine harness. That's why you don't see the plugs on the engine harness. The AVCS cam sensors on the V8 heads are at the back of each head, it's the only sensor back there, easy to see.

To clarify there is an extra bit of wiring with two connectors that goes between the engine harness connector and the connector on the sensor.

If you are missing those pigtail connectors, I'd call up kingpin/ia performance/gruppe-s and see if they have any laying around, they'll know what you are talking about. You can rig something up, but I'd try to keep things clean by getting the right connectors.

Okay forget what no-coast-punk said, you don't have a USDM motor and you aren't using USDM anything.

I would bet 99% that you are missing the two pigtail connectors that connect the AVCS cam sensors to the engine harness. That's why you don't see the plugs on the engine harness. The AVCS cam sensors on the V8 heads are at the back of each head, it's the only sensor back there, easy to see.

To clarify there is an extra bit of wiring with two connectors that goes between the engine harness connector and the connector on the sensor.

If you are missing those pigtail connectors, I'd call up kingpin/ia performance/gruppe-s and see if they have any laying around, they'll know what you are talking about. You can rig something up, but I'd try to keep things clean by getting the right connectors.


are u talking about the blue 2 pin connector that goes on each head? Thats the one for AVCS right? Theres a blue and a gray wiring harness connector on each head.

and just for what its worth, im using a jdm ver7 chassis harness with a jdm ver8 ecu and jdm ver8 engine/ engine wiring harness and i have no CEL.

im using a jdm ver7 chassis harness with a jdm ver8 ecu and jdm ver8 engine/ engine wiring harness and i have no CEL.



What did you do about the air temp sensor ?

Hmm.... I was under the impression the JDM and USDM V8 heads had the same sensor setup. Lesson learned, good to know.

Ah, the "pig tails " . Gottcha. :)

Okay forget what no-coast-punk said, you don't have a USDM motor and you aren't using USDM anything.

I would bet 99% that you are missing the two pigtail connectors that connect the AVCS cam sensors to the engine harness. That's why you don't see the plugs on the engine harness. The AVCS cam sensors on the V8 heads are at the back of each head, it's the only sensor back there, easy to see.

To clarify there is an extra bit of wiring with two connectors that goes between the engine harness connector and the connector on the sensor.

If you are missing those pigtail connectors, I'd call up kingpin/ia performance/gruppe-s and see if they have any laying around, they'll know what you are talking about. You can rig something up, but I'd try to keep things clean by getting the right connectors.

I swear I saw the cam sensor plugs, but I'll double check em. And maybe take a picture.

You have a picture of the said harness conectors by any chance?

I think my o2 sensor is bad also. After triple checking the wiring of course. I tried a different one but I think that o2 sensor was bad aswell.

Yay. Once I get these figured out I can accually get dyno tuned. And I think I found a FMIC before I get it done too :devil:

:banana:

Pictures. First picture is a dirty :) AVCS head with sensor missing, it's in the same position on both heads off to the far right. Second picture is the sensor along with the bit of wiring you may or may not have.

http://my.execpc.com/~pbedard/avcs/avcs1.jpg
http://my.execpc.com/~pbedard/avcs/avcs2.jpg

http://my.execpc.com/~pbedard/avcs/avcs1.jpg
http://my.execpc.com/~pbedard/avcs/avcs2.jpg

Anybody know which wire is the negative and which is the positive for the cam sensor??? Which one is the white, and what is the yellow?

Im trying to plug in my AVCS but cant figure out which wire on each sensor is the + or - .

My front sensor (solenoid) for AVCS is a white with black stripe, and green with black stripe, but which is + and which is -.

Any help would be greatly appreciated.

-John

Here ya go, these are ver7 STI diagrams...


http://www.brendan-stewart.com/other/avcs1.jpg

http://www.brendan-stewart.com/other/avcs2.jpg

Colors don't matter, just follow where they go into the ecu and you'll be all set.

And btw- i've never seen IAPerformances AVCS harness, but you will notice in the above diagram that the AVCS wires are shielded. And i believe for good reason. So if his aren't i'd look into buying some at an electronics specialty store. B84/14 ground the shielding through the ECU, must be important IMO.

-B

And btw- i've never seen IAPerformances AVCS harness, but you will notice in the above diagram that the AVCS wires are shielded. And i believe for good reason. So if his aren't i'd look into buying some at an electronics specialty store. B84/14 ground the shielding through the ECU, must be important IMO.

-B

The IAPerformance kit is really nice, and they shield the wires also. Thanks a lot for the help :)

Just to note, some of the diagrams/ecu's are different in terms of inputs. There are some variations with Euro models and ones with immobilizers.

And the late V7's to all V8's have a second air temp sensor thats mounted under the throttle body. The first one is in the MAF which measures ambient, the second the charge air temp.

Just to note, some of the diagrams/ecu's are different in terms of inputs. There are some variations with Euro models and ones with immobilizers.

And the late V7's to all V8's have a second air temp sensor thats mounted under the throttle body. The first one is in the MAF which measures ambient, the second the charge air temp.

The temp sensor under the throttle body isn't needed. It is used for the water spray on the intercooler. It basically detects heat soak, and then automatically sprays the intercooler.

Thats wierd, a couple of cars I worked on didn't have it hooked up. After I hooked it up, the car ran better ? At least thats what the "butt dyno" felt ! :lol: So I was under the impression that the ecu was compensating A/F mix from actual intake charge air temp. I know the waterspray auto mode goes off of percent throttle position.

hey no-coast-punk are u still selling your car?

Thats wierd, a couple of cars I worked on didn't have it hooked up. After I hooked it up, the car ran better ? At least thats what the "butt dyno" felt ! :lol: So I was under the impression that the ecu was compensating A/F mix from actual intake charge air temp. I know the waterspray auto mode goes off of percent throttle position.


Ran better in what way? Because everyone I talked to said there is no need to hook it up unless you plan to use the water spray.