On the ST185 ecu, it has a single STP wire that needs to be connected to the stop light switch via the brake master cylinder. Why does the ecu need to know when its braking? ABS? or for backing off fuel maps etc?????
that's why they still on the market till today.computers my man the best thing ever happen'd in our life's
st185 there's your info.look up stp you are mate. Abbreviation Wire colour Means... What does it do? Anything else? E01 White/Black Earth Attached to engine block ISC-1 Green/White Idle Stabilisation Control Opens a valve below the throttle body to control the idle speed rpm STA Black Starting signal 12V fed to the ECU whilst the car is trying to start STJ Green Cold start injector Signal to control the 5th injector when starting the car #1 Red/Black Injector signal Fires No 1 fuel injector #2 Light Green Injector signal Fires No 2 fuel injector G- Red Distributor signals Ground for G1, G2 and NE G1 Dark Green Distributor signals Sends crankshaft angle information Allows ECU to determine the position of each piston, adjust injector and ignition timing G2 White Distributor signals Sends crankshaft angle information As above, but 180o out from G1 NE Black Engine rpm signal Sends the engine speed and crankshaft angle to the ECU Positive signal from 24 tooth sensor FPR Blue/Red Fuel Pump Relay Clicks on the fuel relay when you turn the ignition key If it doesn't activate the fuel relay the car won't start IGF White/Red Spark confirmation signal Used to detect a fault within the igniter THW Red Water temperature sensor Informs ECU of water temperature Probably used to correct fuel and ignition maps WIN Light Green/Black Intercooler computer signal Error reporting? TPC Black/White TVSV signal Allows extra boost in 3+ gears ~2psi Don't cut this wire, pull the pipe off from the wastegate actuator instead! SPD Blue/White Speed sensor Monitors car speed STP Green/White Stop light switch Monitors the brake light switch To inform the ECU when braking, to apply deceleration fuel cut THA Grey AFM air intake temp Tells the ECU the temp of the incoming air VS Grey/Black AFM signal Stopped - idle signal VC Pink/Blue AFM signal Variable - flap position signal BATT Pink Battery supply Supplies power to ECU via the 15A engine bay fuse Permanent 12V feed to the battery even when the ignition is off ELS Orange Electrical idle up Increases idle speed due to large current drawn by headlights and demister
-is that correct? if it applied a decel fuel cut how would you heel toe? i would think the ecu would only be monitering engine sensors to determine fuel. e.g. afm, tps, o2, water temp sensors, ect. turbo should have more? but i dont think braking should have any effect on fueling. -i belive on the 162s the ecu just moniters brake fluid level. if its low it kicks the e-brake "BRAKE" light on. -i have been wrong before thou.
its weird how the plug is plugged onto the break booster, and not the brake switch on the brake pedal inside the car.
the STP pin controls the idle. if you are on the brakes at idle the ecu bumps it up a little to compensate. that's all it does.