MA240SX | Forums

I installed the JDM S13 DCC in my daily this weekend and figured id do a write up on it. As a basis i used this post on NICO by Beatupsx
http://forums.nicoclub.com/zerothread?id=160285
I will try do go more in depth to make this install more simple. Some words will be quoted from that post.
^^ This write up is way more printer friendly, i suggest if you have a good idea of what you need to do print that thread and refer to mine if you have any questions, there are slight differences.

Here is the list of parts you will need.

1. JDM S13 Digital climate control unit

2. JDM S13 Digital climate control sub-harness

3. JDM S13 Blend door actuator
^^JDM only parts^^

4. Blower motor speed controller, i used the JDM S13 one, you can also use one "from a 92 Q45 but most mid 90's maxima with automatic climate control should work to"

5. Optional** JDM Thermo control amp ( i used the stock one with no modifications, not sure if it would change anything)

6. JDM aspirator tube(connects air box to cabin temp sensor) also from "mid 90's maxima with automatic climate control"


SENSORS
1. JDM Ambient air temp sensor ("you can get it from a 91 pathfinder and most mid 90's maxima"

2. JDM Cabin air temp sensor ("most mid 90's maxima")

3. JDM Sunload sensor ("most mid 90's maxima")



INSTALLATION

1. Wiring
The wiring for the DCC is very simple and can be done without any trouble. The only JDM wiring you need is the harness that plugs into the DCC unit. The sensors will plug into that and if you have the sensors with connectors it will make the install easier. There are 3 power wires and one ground that have to be spliced into the harness.

1. Constant +12v power. This wire is the single red wire with a single plug on the JDM DCC harness. I spliced this into the memory wire for the radio, it is Red/black stripe on the USDM chassis side of the radio harness.


2. Ignition on +12v power. This wire is Blue/Red stripe and is on the small 6 wire connector on the JDM DCC harness( see below ). I spliced it into a blue wire on the USDM Radio connector on the dash harness that has power with the ignition on.( see above)


^^ 6 wire connector


3. Ignition on +12v power. This wire is the Green/white stripe on the small 6 wire connector( see above). This wire can be disconnected at the 6 wire connector and re pinned into the large 16 pin connector( see below) in an empty spot. This spot has ignition on +12v that is already run the the USDM dash side so all you have to do is plug it in and it will work, no soldering.



4. Ground wire. This is the last wire you have to run. On the USDM side of the 16pin climate control connector there is a Red/orange stripe wire that needs to be grounded.( see below) I cut the wire a few inches from the connector and attached a ground eyehook and bolted it to the dash frame.

Now you need to remove the bottom of the Air box in order to install the Aspirator tube for the cabin air temp sensor. This is very simple as well. I installed the DCC with the dash off and i think it makes it a lot easier to install. Here is the difference between the USDM and JDM airbox.




JDM aspirator tube connected to the Air box

Next you can install the Blower motor speed controller. You just unbolt the USDM one and bolt up the JDM one with no modification. It will plug right in as well the connector is just turned 90 degrees.


Picture of difference, JDM on right, USDM on left. JDM is 3 wire and USDM is 4, but the connector will plug in.


Mounting the Blend door (hot/cold)Actuator comes next. You have to make brackets to hold it in place of the USDM cable. I will outline this with pictures as they tell you everything you need to know














After you make the bracket and bolt the unit up you need to hook up the linkage. The JDM linkage is flipped from the way the USDM one screws in, the picture below will show exactly how it needs to be hooked up.

^^ Picture taken from passanger floor^^

After this you have to notch the duct to send air the the passenger feet


All that is left now is to install the sensors. My unit came with all the sensors with plugs so i only had to mount and connect the sensors to the JDM DCC harness with no wiring needed. Go to beatupsx's thread that is linked at the top of the page if you need to find out wiring colors.

1. Sunload sensor. For this sensor you have to cut a hole in the top vent plastic and clip the sensor into place. Once you have it mounted just connect up the wires to the harness and it should work.



2. Ambient Temp sensor. This sensor needs to be mounted in the grill area of the car and have wires run to the DCC unit.

3. Cabin air temp sensor. The cabin air temp sensor hooks into the end of the Aspirator tube that goes into the bottom of the airbox. You can mount this anywhere you think is a good spot. You need to attach it to any spot on the dash area and cut slits for it to pull air through



After you hook up the sensors and bolt the unit in the car you will have a fully functioning JDM DCC!!!


Quoted from "Dammitboy"

"
To run a self-diagnostic for the DCC:
Turn engine on. Within 10 second of starting engine, press and hold ‘OFF’ button on the ACC for 5-10 seconds until all segments on the display light up.
Test 1- Display Test. Look for any missing segments or icons
Press Up arrow to get to Test 2.
Test 2 – Input signals from each sensor Wait a couple seconds and it’ll display error codes (20=all ok, 21=ambient, 22=in-vehicle, 24=intake, 25=sunload (test in sunlight to prevent this error), 26=PBR)
Press Up arrow to get to Test 3 or Down arrow to get to Test 1
Test 3 – Mode Door Motor This test takes a little longer. 30=all modes ok, 31=vent, 32=B/L, 33=B/L, 34=Foot/Def 1, 35=Foot/Def 2, 36=Def
Press Up arrow to get to Test 4 or Down arrow to get to Test 3
Test 4 – Actuators Test Pattern Toggle modes 41-46 by pressing defrost button on ACC.
Test 5 – Temperature Readings Press defrost button to toggle through sensors (ambient, in-vehicle, intake in that order). If the temp is -22, then that sensor is not working. The temperature can also be adjusted to compensate for differences between temp setting and the temp felt by driver. It can be adjusted 6 degrees up or down. While in Test 5, press the fan switch and then the temp adjustment can be made using the Up/Down arrows.
Hit Auto button or turn car off to exit self-diag."

it's been more than a weekend since you did this...... more like two weeks ago. i smell remote linking >.>

ltmq j/p man.

Man cut and pasting too forever, i put this up on Zilvia and a lot of people on here aren't on there.

good stuff... i don't have ac lol

Good info

wheres my cred for making thoes brackets and shit dammit! lol jk