Never hot wire or ground out the ECU +5vdc(Ref) pin. CCW= counter clock wise , CW , guess? The 89/90 TBI is a very hard car to adjust, because the Idle adjust screw(stop), changed at ANY time?, wrecks the TPS calibration (Suzuki corrected this pain, in 1991, folly?) Note now that the main resistor A to D is very crude, its not precision at all, so if yours reds 4000 ohms and steady , then that is what it is. ), Photo #1:(aka. (my short list, lol) Turn ON the ignition, but do Disclosure: I am not a mechanic. On cars that dont have an adjustable throttle position sensor, the ECM custom built to order, please reach out to us. Set the scan tool to TPS voltage (or connect DVM) then set the adjustment screw for the lowest value & still touching the throttle arm stop. ( not 300 or 50 ohms or less,or some other value , but trueinfinity). This should force the radiator fans to come on. When they do, they usually freeze up or get stuck in a fixed position. This method guarantees some tiny fractions of inches ( of over/under-travel.) PHOTO 3: 92-98 look same. You control the throttle body position with the . To be sure,must guys just set it to .026 drive around the block and all is well. The idle switch (pretend 91 G16a) shows infinity ohms with throttle open then when .016 gap (.4mm) happens the OHMS drops to 500 or less like a shot, some do this at 1000 ohms, we calibrate near 500 but is crude, just get it below 500, a touch. The TPS can be tested on a bench too. To adjust the throttle position sensor (TPS) of the Vehicles you must remove the Vehicles and alter its makeup slightly. TPS end Connectorunplugged, do not force it. The green arrow points to the COM Port for your laptop. If the switch fails , the car will NEVER idle correctly ( it will vary with load on the engine) Turn the ignition key on but do not start the engine. Measure output voltage of Throttle Sensor using voltmeter. TPpin is the Throttle angle pin (wiper) of the TPS, not the idle switch. Pins C . The TP sensor must remain connected to its connector during the whole adjustment procedure. automatically learns the closed throttle voltage when the ignition is keyed on Cheers !, you are now calibrated. Turn ignition switch is "OFF' wait at least 10 seconds. end test 4: Predicates: The TPS switch is not closed at idle, for any reasons. You may see a Com Port error message. Make sure that the throttle valve moves during above 10 seconds by confirming the operating sound. All colors are harness colors. TPS idle switch Calibration G16s , J18/J20 engines. When you cut the throttle and the TPS fails to close, the EGR cut will fail, as will the Dash-Pot effect, anti neck snapping feature , of cut fuel mode. (will not cause timing freeze to fail), Gunk under the throttle valve, in, under and around the butterfly plate to bore. This same pin if failing for any reason will cause theSpark timing freezeENABLE to fail too. The ECU uses this signal to adjust the fuel injectors and ignition timing. Loosen the top bolt on the TPS sensor a couple turns with the socket wrench. NO MPI engine G16B has such a device. How the TPS is used on a cold engine veries by car maker (ECU tuner), my whole pages covers only a hot running engine. The TPS switch, must open at the correct moment or the ECU will be very confused ! On a running engine the idle switch reads 0v. Connect voltmeter positive lead to terminal "A" (M/T and A/T) of sensor connector. The 3 video tests (mp4) on the left. The 4l60e will not respond to manual shifting like the old non electronic . This will allow you attach the leads of your Volt Meter to the various pins for testing. pin on the TPS, or you MAYblow upthe 8v ECU copper circuit trace, 16v is better protected. Engines that have higher compression or are new/rebuilt can have higher The Feeler gauge Matrix Table 1: (created from all origional FSM manuals (factory service manuals) Suzuk and GM.) (after the key has been off for at least 10 seconds). Never hot wire injectors or VSV solenoid valves with ECU hooked up.. or Boom you let the smoke out !, TPS FAILS:(TPS , its wires. Buzz words: The idle switch must be closed and near 0v running or the timing freezeand many things will fail. internal loads/friction which can also result in a drop of idle vacuum levels. Diagnostic manual comes with: Wiring diagram. Attach an Ohm meter (DVM set to ohms resistance starting on the 2k range 2000 ohms) per instructions. Gray/red TPS WIRES This other devices must not short out the throttle angle pin, ever. Location. The TPS was not set with the feeler gauge on the threshold of closure. And either the IAC needs to open up or the throttle blade must be opened Your Equinox's throttle body controls the amount of air that enters the engine. Wait at least Figure1 I am hoping to get some advice about an issue I had with my Cruze earlier today. NOTE: If you get a Check Engine light error indicating that a TPS failure, it is most likely caused by not having the TPS driver nut in the correct position. This will take a while to do since the sensor is very hard to adjust due to its sensitivity. Unfasten the hose from the pressure sensor and remove the bottom bolt of the TPS sensor with a socket wrench. 1,287. A,B and D. (1,2,3,4 on 16v) 5.0 out of 5 stars Perfect Fit for Mercruiser MEFI3 TBI 5.7L Mercruiser. The PCM on that truck will look for a TPS input signal to help determine the shift points and main line pressure of the 4L60E. Anyway, after adjusting the sensor to as close to .45v as poss with the ign on but without the engine running, i done the reset thingy with the on off for 5 secs 5 times and started her up and the light stayed out (for the 1st time in a couplo weeks) for about 5 minutes on idle with a little reving now n then. The IAC valve cannot be tested using conventional Wrong engine in car, wrong ECU, wrong, THROTTLE BODY, some joker put the wrong generation parts on top of engine? Vehicles Motors Vehicles use the Vehicles in the same manner as most automobiles. Previous owner removed it and put it back and now its not calibrated or did the calibration guessing or with wrong feeler gauges? MPI, the 16valve engine with the words 16 valves embossed on top of valve cover, and is multipoint INJECTED (4 injectors). 16 valve MPI only. The 16v uses software for a Dashpot function. The TPS on some cars can be removed and inserted wrong, effectively making the TPS DEAD. Please show me exactly how i change the TPS to make those adjustments, because when you say, "elongate . Now press the accelerator pedal all the way to the floor and hold it there until the Dash Display stabilizes with the Wide Open Throttle (WOT) percentage reading. if it reads 4k is must, be so, at all times (that is how yours is and works) One example of this is when the engine is modified, or a different J18 idle speeds out of control are covered here. I'll post a pic of it later. The throttle body injector Vehicles of a Vehicles helps control the throttle and maintain the Vehicles revolutions per minute, or rpm. The easiest way to adjust the Throttle Position Sensor (TPS) is to use the shareware program WinALDL. whats wrong with it? The green arrow is pointing to the voltage reading which should be close to 0.50 volts. On car pin one is 5vdc key on and pin 1 is ground. Never hot wire any output pins on any ECU. (we cant burn air), ergo the TPS angle pot was invented. Meter to A and B, the same as above but in reverse actions. Start engine and warm up sufficiently. Set theDMMvoltmeter to 20VDC range, and connect the minus (black) test lead to the battery, minus lug , for best results. FSM TBI actual pages on calibration. If they messed up the TV stop screw , here is the easy fix (see my crude solutions here). The two numbers are dependent on each other so if you fix one, youve also fixed the other one. How to time the distributor G16B (16V)? Below are theactual FSM pagesfor TPS calibration: TBI 1991 and UP. This is why the feeler gauges are used. Mine was 2.33 at WOT - So I loosened the torx screws and tried to adjust the TPS. (if not ? 3. when you get the percentage number within parameter, youll also have the voltage within parameter and vice versa. Tighten the screw by turning it clockwise. repeat them all. If the meter does not read 5 volts, the TPS is bad. But does in LIMPHOME. This section is NOT CALIBRATION! Look close and see cracks. 5. (a danger) Your multimeter should read 0.42 to 0.45 Volts DC with the throttle plate closed. the throttle cable or cruise control system that isnt allowing the throttle to If unable to pull 6", be sure front TBI throttle stop screw is not limiting throttle travel. The minimum air setting is what is used to describe the amount of air If you get a Check Engine light error indicating that a TPS failure, it is most likely caused by not having the TPS driver nut in the correct position. To help us guarantee the correct parts for your classic car. (pin B) (it just acts up, (enrich mode or cut fuel on the fly, when at steady cruise,will be ugly here)! Loosen TPS side screws, so they are only slightly tight. There is a Torx screw on the side of the throttle body. Use a hand vacuum tool to retract it for calibration. (cut means broken,cut or corroded) after 100k miles many TPS can fail on any car, and depends, on utility, be that, city ,highway or mix, when that happens. The throttle stop screws primary function is to The TPS should read between 4.0 and 5.5 volts. Best place for asking questions is FixKick forum. Scooter's Caramelicious Recipe,
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