H5WAGON Posted September 23, 2011 Report Share Posted September 23, 2011 Ok so I searched and found nothing on this. So is any one running a 240sx Auto trans in there Datsun, car or truck?:( Yes it has to be an automatic, my wife's car. I have figured out I need to get the ecu for the trans (pretty sure) I'm in the process of getting a FSM for the 240 and finding a Auto trans/ecu module. 1 Quote Link to comment
datzenmike Posted September 23, 2011 Report Share Posted September 23, 2011 Other than the ignition interlock and reverse lights switch The only other thing electrical on the L4N71B behind a KA24E in a 240sx is the speed sensor I think. The speed sensor takes the place of the mechanical speedometer cable drive. My guess is that it sends electrical pulses to the EFI's ECU which interprets this and generates a speedometer reading for the dash and may have some effect on emissions. The 5 speed standards use the speed sensor output to enable a rev limiter. There are standard transmission and automatic transmission ECUs and they are different. If you know the year of the 240sx motor and if California or not I can give you the ECU part number. 1 Quote Link to comment
H5WAGON Posted September 24, 2011 Author Report Share Posted September 24, 2011 I have the #11 Automatic.....ECU for the motor. But was looking on Scibd.com....240sx FSM and their is a smaller ecu just for the Trans. Solenoid for valve body Speed sensor Rotation sensor Inhibitor switch O/D switch The Plugs, Top to Bottom... 1st: 2-wires Speed Sensor 2nd and 3rd set go to the inhibitor switch....One plug with 2 thick wires(OD?) and another 7wire plug 4th: 7-wires goes to the solenoids in the valve body 5t: Rotation sensor The # on the transmission tag is: (Also I have 3 transmission, thats why some pics have plugs for all the wires.) 1 Quote Link to comment
H5WAGON Posted September 24, 2011 Author Report Share Posted September 24, 2011 Just for reference these are the 3 EFI (Main) ECU's I have 1 Quote Link to comment
datzenmike Posted September 24, 2011 Report Share Posted September 24, 2011 A11 B03 G49 ... '89 automatic non California A11 B16 G12 ... '89 automatic non California A11 B05 G51 ... '89 automatic California Didn't know there was a separate ECU control for the tranny. 1 Quote Link to comment
H5WAGON Posted September 24, 2011 Author Report Share Posted September 24, 2011 Trying to bring up the wiring diagram. EDIT(crappy link) 240 edge.com EDIT(Better Link below....Post#15 & 16) Fun, Fun..:D Looks like the trans ecu is up under the dash. Edit: Its in the passenger kick panel 1 Quote Link to comment
datzenmike Posted September 24, 2011 Report Share Posted September 24, 2011 Had trouble loading that. X3 gave up. 1 Quote Link to comment
H5WAGON Posted September 24, 2011 Author Report Share Posted September 24, 2011 The 240 edge link works moar better! I will also have to put in a micro switch for the kickdown.....should be very interesting sorting it all out.:cool: 1 Quote Link to comment
Laecaon Posted September 24, 2011 Report Share Posted September 24, 2011 The 240 edge link works moar better! I will also have to put in a micro switch for the kickdown.....should be very interesting sorting it all out.:cool: Want the kickdown switch from my wagon? I imagine it could work... 1 Quote Link to comment
yello620 Posted September 24, 2011 Report Share Posted September 24, 2011 The M30 Kickdown switch was mounted on the gas pedal, looked super simple too. And that wiring, the two wire connector with the extra large wires should be for the starter interupt(neutral safety switch). 1 Quote Link to comment
H5WAGON Posted September 24, 2011 Author Report Share Posted September 24, 2011 Want the kickdown switch from my wagon? I imagine it could work... I just might.....I'm going to the Columbia yard Sunday...the are dropping a 240sx/auto in the yard tomorrow. Need to look over all the little shit. Thanks yello620! It will all start to get clearer once I have everything in front of me..:mellow: 1 Quote Link to comment
H5WAGON Posted September 26, 2011 Author Report Share Posted September 26, 2011 Ok found the A/T computer. Checking out the shifter cable location. The plan is to use a piece of round stock to go into that hole with a hoop welded on to hold the cable. Drilled and taped from the bottom to hold it in. 1 Quote Link to comment
H5WAGON Posted September 26, 2011 Author Report Share Posted September 26, 2011 The M30 Kickdown switch was mounted on the gas pedal, looked super simple too. And that wiring, the two wire connector with the extra large wires should be for the starter interupt(neutral safety switch). Been looking at wiring diagrams...:wacko: Need to print some out! I got the 240sx pedal w/switch.:D Also got all the plugs that the trans wiring plugs into. 1 Quote Link to comment
datzenmike Posted September 26, 2011 Report Share Posted September 26, 2011 Ok found the A/T computer. I had heard that the transmissions were becoming more complex because of emission controls. No longer do you give it the gas and go. Before there is any up or down shifting the emissions control system is asked permission first. It sets the motor and gear combination or shift points to reduce pollution. Just.... wow. 1 Quote Link to comment
H5WAGON Posted October 3, 2011 Author Report Share Posted October 3, 2011 I posted this in my build thread also.... This is the trans mount that was made for the Ford Automatic that was in this car before.....I will cut out part of the 240 mount to bolt up to tans mount then bolt or weld to this one....make some bigger holes to get to the bolts. Better pics of the crossmember and the tight fit later....:blink: Looking over the 240 main wiring....here is a short list of what I need to hook up to the Auto ECU 116....should be 115..:huh: The Automatic ECU wiring 240sx Auto.trans pdf ........ Page 122......for the 240sx 1 Quote Link to comment
H5WAGON Posted October 3, 2011 Author Report Share Posted October 3, 2011 240sx main wiring Page 9 Page 9 once you open the pdf. Thing are looking a lot clearer..:cool: Will have my hard copies tonight. 1 Quote Link to comment
H5WAGON Posted October 3, 2011 Author Report Share Posted October 3, 2011 This is the 10-pin connector off the main harness.....make sure you get this out of the 240....there is also a dropping resistor for the trans. 5 of the wires go to the Auto ECU Dropping Resistor for trans. 1 Quote Link to comment
H5WAGON Posted October 6, 2011 Author Report Share Posted October 6, 2011 I will only be adding the wiring info in this thread. Once I have it all figured out. Its looking easy...just spending more time on the motor right now. This is the wiring for the 240sx Auto trans computer.....Going thru it I have identified all the wires....No mystery wires...:cool: Quote Link to comment
H5WAGON Posted October 7, 2011 Author Report Share Posted October 7, 2011 I pretty much wired the A/T ECU in my mind today.....30 contacts.;) 2 Quote Link to comment
bananahamuck Posted October 7, 2011 Report Share Posted October 7, 2011 This is the 10-pin connector off the main harness.....make sure you get this out of the 240....there is also a dropping resistor for the trans. 5 of the wires go to the Auto ECU Dropping Resistor for trans. Why does it need a resistor?? I know it`s hard to work and remember to take pictures...so i say to you.... :thumbup: 1 Quote Link to comment
H5WAGON Posted October 7, 2011 Author Report Share Posted October 7, 2011 It hooks in with the line pressure solenoid form the valve body. 1 Quote Link to comment
H5WAGON Posted October 8, 2011 Author Report Share Posted October 8, 2011 Transmission harnesses to A/T computer...... 3 wire-Revolution Sensor, 7 wire-Inhibitor, 7 wire-Solenoids(Valve body A/T) + the Dropping resistor.:D So 5 more wires go to the main computer.....others are for Kick down switch, over drive switch, speedo sensor, power, ground and TVS switch A few others.. tap in from the main harness......more on that later. And yes this is all just test fitting.....I get to go thru and solder and heat shrink everything. 1 Quote Link to comment
H5WAGON Posted October 29, 2011 Author Report Share Posted October 29, 2011 Well after looking over everything, there are 8 wires that hook to the main harness, using the 10 pin connector. After hooking up the 3 main plugs from the transmission. Also 2 different power wires(one for Inhibitor switch and one for computer) ground, O/d switch & kick down switch lead...Ground=ON.....2 for the cruise control(will tackle that after car is running) Main ECU / AT ECU 115 / 27 3 / 25 8 / 15 28 / 11 32 / 24 37 / 10 33 / 4 TVS....../ 17 All 8 of these wires are on the 10 pin white connector on the main harness. Wire 115-Blue was put into a unused spot, but lined up on the At comp harness. Action shot! AT computer hooked to Main harness. 2 Quote Link to comment
izzo Posted October 29, 2011 Report Share Posted October 29, 2011 Damn man. That wiring in the engine bay looks clean. Good job 1 Quote Link to comment
H5WAGON Posted October 29, 2011 Author Report Share Posted October 29, 2011 Thanks, that stuff is fun to figure out....Recon trips to the Hardware store.:D Will put some Black RTV in between the 2 grommets, also the one going to the firewall. 1 Quote Link to comment
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