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?) FAILURE SYMPTOMS Hesitation, tip in surge, engine pinging, no torque converter lockup. well, one is ground , one is 5v, and TP is low volts) Its the gray wire, with no stripe.). If the TPS goes bad it can make the machine run erratically, or cause a hesitation at certain rpm's. (not indexed to the body correctly, per the FSM) It doesnt have to be accurate , just consistent and linear. or hackers messed up my car? spec is. What is it? Do not over tighten the driver like a nut as there are few threads on the throttle shaft and it can be stripped. im lost, explain and we can help more. The ECU now throws, DTC errors for the TPS. Go/NoGo and Calibrate sizes. operated at normal road speeds (35mph or more). diagnostic (ALDL) connector and start the engine. (or cause bore wear) Suzuki has NO SPEC. Tighten all TPS screws (a double check) and put back its connector. Just give it a try. ), blocked from anyone touching it !!! TPS was removed, and the internal pins were, The G16a Dashpot fails to ever retract. The check engine light came on and I had it read at an auto parts store. (the glitching can be VERY fast, 20/1000s of second ) The dash pot is the cold start, fast idle device, (short duration 3 to 30 seconds (30 is in Alaska). This is the Fast ohms tests, unplugged tests. Close the hood of the car. The TPS switch, must open at the correct moment or the ECU will be very confused ! (cut means broken,cut or corroded) Back probe the TPS connector, using theneedleson the red meter test lead. when you have it at .50v simply tighten the screws and make sure it stays at .50v some times it will change after you tighten it lower or higher than what you want. On cars that dont have an adjustable throttle position sensor, the ECM (7/16 inches). The ECU checks for errors (DTC) on the Angle side., or wires cut to it (cut means , really cut broken or any connector in this path RUSTY) (rusty , corroded, broken pins, bent pins, smashed ,etc) MPI is 16v Multipoint Injection motors, and has no Dash pot steps, or device. The cables must never be tight and holding the Throttle valve open (TV) at all. Side one is called the IDLE SWITCH , the other side, is the TP (throttle position side or Throttle Angle), This side form a basic Potentiometer, (POT) or variable resistor. Adjust the TBI. the throttle cable or cruise control system that isnt allowing the throttle to As the name states, backprobing is the art of connecting to live circuits, at connectors still connected, past those rubber seals there The 1996 to 1998 real FSM calibration procedures for TPS is Here and Here. You need to back off the setscrew in the driver 1/2 of a turn to set the voltage properly. I do not have a ton a high quality tools. Throttle body INJECTED with just 1 injector. (timing jumps during static timing procedures?) or even jam the throttle). If youve selected the correct COM Port, youll see data scrolling when the key is in the on position and when the engine is running. By the way, if idle speed is out of control ?,with the switch closed (0-volts) is coveredfound here. and Fast idle commands(ECU) will never happen. This shows you why the switch part never hits 0 ohms, like a real switch, that is because this one is Carbon, not gold contacts. 6932 Views 1 Reply 2 Participants Last post by Matt_vs_YJ, Aug 7, 2008. The idle switch is the only device calibrated here. (cruise , throttle and a/t kick down cables) on the engine (such as what would occur if the automatic transmission was Remove the air cleaner lid and the air duct leading to the throttle body using the Phillips screwdriver. (Fuel pressure wrong, timing belt slipped, EGR stuck open, leaking injectors,clogged injectors (full or partial)), Exceptions:(to how the TPS is used) 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. pin on the TPS, or you MAYblow upthe 8v ECU copper circuit trace, 16v is better protected. The IAC valve cannot be tested using conventional Then if you open the throttle another 1.28 degrees, the throttle vane is actually open 2.20 degrees but the Motronic reads 1.6 degrees. This method guarantees some tiny fractions of inches ( of over/under-travel.) Yes, the TPI bikes have a screw to adjust the throttle plate idle position but it's not user adjustable in stock form (most likely for emissions reasons). The code that showed up was P2135 which indicates a throttle issue. 1) This may be .045-.065 volts. The TPS on this car is tricky to calibrate (16v). C and D Pins. The idle switch must be closed and near 0v running or the timing freezeand many things will fail. if the Auto ranger shows 0.300 kthat is 300 ohms. Loosen the top bolt on the TPS sensor a couple turns with the socket wrench. Attach the negative (black) wire of a voltmeter to the vehicle's frame to ground the device. THE REAL DEAL ! at throttle tip-in (evil effects here). AT4X versions of the GMC Sierra and Canyon. Location. Replace the TBI by placing it back in the engine. It also shows you how the carbon works, the Gold wiper device is missing here. It allows air to bypass the throttle plate. Be sure to wiggle all connections while watching scan data/voltage readout to make sure the problem is not a loose or bad connection. The 16v uses software for a Dashpot function. TEST 1: Checking The Throttle Position Sensor (TPS) Signal. this gap and that is what I use for guide lines getting this correct. 1985-1992 Firebird 305 and 350 TPI. The throttle body can be differently priced depending on different vehicles, models, and the manufacturing company. WOT is about 3.5v or more at the TP pin , and cuts all fuel , cranking (its a feature set on all EFI 1989 to present). Plug in the scan tool to the ECM. Tip-in as in your right foot tips in the throttle and engine hesitates a bit. if any of these steps fail. Trouble code definitions. TCM, transmission controller module (4 speed automatic) Turn the ignition ON, but do not try to start the engine. Side1 is the calibration pin. See photos, at end of this page. There are about 50 ohms or near 0volts) OFF means the switch reads, Infinity. At idle, its .54 volts, which i think is correct. (if this pin fails?, hard, the ECU may go toFailsafe mode, Sets DTC for TPS , if it glitchesNo voltageJumpinessordrop outsallowed! This table was made from real USA FSM data. rebuilt throttle body spark plugs, wires, cap, rotor, blah blah blah new O2 sensor new TPS sensor cleaned EGR valve and solenoid I can't seem to get the TPS adjusted correctly. Secure the bolt at the bottom of the TPS sensor and attach the hoses to the sensor and inlet pipe. (Imnot sure whichDTC # is which) Vehicles Motors Vehicles use the Vehicles in the same manner as most automobiles. or open 5v wire (like 5vdc is dead on the 5v pin of TPS, 5vdc gone is bad ECU ) See 1989/90 procedures here and quite unique. electrical testing means. BENCH Glitch TESTS? (hesitations). This page is only complex because of the 10 years covered and 2 engines and evolutions of the same. The TP usually has 4vdc output at 100% throttle. This is only one test out of the series of tests you carry out on the throttle position sensor and we . (using 20k meter range) never reads infinity. These simple tests follow below: TheDash Pot must be retracted, when stated. The TPS usually can never causes stalling, the #1 cause of that bad act, is EGR stuck open. Anything over 80% is acceptable and in this example its 92.9% as you can see in both the Dash and Sensor Data display. TBI Adapters; Throttle Position Sensor; . (to avoid this nasty EFFECT) (the ECU does not use this way, but I check it so I can find glitches not found , B to D.) (Accelerating he/she is?) I check ohms for 3500- 6500 ohms, pin A to D. ( its very crude) It must not read infinity or the TPS is no good. Do not disconnect the connector, until you wish to do an OHMS test, above. TPS installation and adjusting the TPS. intake manifold and outside (ambient) air. On car pin one is 5vdc key on and pin 1 is ground. Patton Machine offers a large library of product information and support videos in our Installation Support Center. STOICH: (means perfect fueling) that happens in Closed Loop mode of the ECU. G16A. See Full PDF (8pages) factory CALIBRATION. Back probe pin C. (at factory side, blue-white wire, ) This is the calibrate pin, and we are only testing now, notCalibrating yet. Cheers !, you are now calibrated. The reading should be the same as the previous reading. If not, allhell breaks loosewith the driver (Max Surge) This is why we use the all 3 feeler gauges for calibration. There are 2 sections in this device, the top section is thePotentiometer (POT) or as some call it a variable resistor. (IAC counts = 0), thus closing off the idle air passage. Standard Ignition 3 Terminal Connector - S674. Photo 6: The idle stop screw must never be turned. The throttle stop screws primary function is to TPS end Connectorunplugged, do not force it. NOTE: The percentage & voltage adjustments are completely intertwined i.e. This is the reason why GM installs a tamper-proof plug over the throttle ( I corrected and error here.. shame on me) operated at normal road speeds (35mph or more). The two numbers are dependent on each other so if you fix one, youve also fixed the other one. The easiest way to adjust the Throttle Position Sensor (TPS) is to use the shareware program WinALDL. (Throttle Position Sensor, Switch) See above graphic 1, for pin assignments. INDEX: (all G16 unless stated otherwise)All years are USA generations, not worldwide! (or to the engines shinny metal) For a ground reference. Those nincompoops? TV= throttle valve, that is the butterfly valve, dead center inside theTB,the Throttle body. The wrong factory part number TPS was installed. There are exceptions to that. (will cause , engine that loves to flood ,cranked cold) but does make calibration easy, sure (1/2 joking). and 2: As you measure the Pot wiper pin, to the other end ground pin, say D or (16v pin 1) the TP pin must vary from below 2k ohms to max what ever you read in line above. The TV must not bepacked in GUNK causing TV to not fully close. (if it wont calibrate the TPS is bad or mounted wrong or theTVis not closed 100% or someone bent the TV shaft or the TPS is not indexed to the body right.). Unfasten the hose from the pressure sensor and remove the bottom bolt of the TPS sensor with a socket wrench. (the ECU idle serve fights the drivers actions) 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. The 8v is aTBI, throttle body injectiona.k.a. 1,2,3,4, bottom up. if this pin drops below 4% throttle angle (below about0.2Volts) driving, you will getDTC codes 21/22 errors. 1.8L DOHC J18 engine (or 2.0L J20) Sport Suzuki TPS calibration on the throttle body. The 4l60e will not respond to manual shifting like the old non electronic . (and patience galore) Scope on pin B . Throttle Stop Screw Connect voltmeter negative lead to terminal "B" (M/T), or terminal "D" (A/T) of sensor connector. THE OHMS test. It is a passive device, no electronics inside, only carbon . (varies by maker of DMM) The reading should be the same as the previous reading. Start engine and warm up sufficiently. rebuilt or cleaned) or the TPS (throttle position sensor) has been replaced or otherwise disturbed (i.e. When working correctly it used to read 0.65v at idle and the "new" one which replaced it reads about 0.56-0.58. Then the ECU causes a hesitation when you demand power. (4vdc on TP pin) all injections cut. The 3 video tests (mp4) 180F+ coolant temperatures. Tighten the screw by turning it clockwise. The voltage tracks my foot throttle 1:1 that is direct action and linear) IF the TP pin hasglitches as you accelerate? 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. Below are theactual FSM pagesfor TPS calibration: TBI 1991 and UP. ThrottleAngle: (the Suzuki TP pin) Tighten the two bolts in the sensor so it will no longer move. Put back the Dash pot, as you found it. By using power supply and a 470k ohm resistor from the TP pin B to D ground. but at with the pedal to the floor, it only goes to 3.9v (the old sensor did this too, probably didnt need replaced.) 4. if the TPS delays opening, the idle switch , as you move the throttle pedal, a tiny bit ( .020) The ECU and ISC will fight you hard, and it willSURGEduring that fight. 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