This page is only complex because of the 10 years covered and 2 engines and evolutions of the same. Begin the calibration. 1,287. (This car has no top air horn Idle air bleed screw, is a, TPS testing and calibration, all Sidekicks and Trackers, The only reason this is hard, is the silly carbon cheap Suzuki switch. (it is just a vacuum servo motor, a vacuum actuator Never hot wire the main relay or fuel pump relay or blow the ECU driver transistors to H3LL. The TPS angle pin is watched by the ECU for the driversfast moving right foot. This helps your ECU control the fuel and air mixture. BEGIN TESTING the G16A, TBI engine 1991- 1995: (8 valve , engine only) The 3 video tests (mp4) Put the scope probe to pin B and D. Scope shield ground clip to D Infinity resistance ohm, is open = ( meterDMMdisplaying O.R, over range, or O.L, over load,see your metersoperational manual, some show over range in different ways) Adjusting the TPS switch is the ACT of Calibration. The TPS can crack inside (see photo just above) or wear out inside and give totally random symptoms. The TPS was not set with the feeler gauge on the threshold of closure. A dead ISC, or one that is active when you accelerate say to 1000 RPM, The engine will never idle or will idle out (DIE) at stop signs, etc. (timing jumps during static timing procedures?) The TPS acts oddly, because the ECU is in. (0 volts connected on a running engine at idle (hot)) Sorry I didn't have enough time earlier to post up all the details. If not get one of the HAYES or CHILTON manuals manuals and do some reading. Diagnostic manual comes with: Wiring diagram. The throttle position sensor (TPS) is a device on the engine that detects the position of the throttle plate. The throttle position sensor (or TPS) monitors the throttle body butterfly valve. Anything over 4.5v is what the computer sees as full throttle. Attach an Ohm meter (DVM set to ohms resistance starting on the 2k range 2000 ohms) per instructions. need to adjust the throttle stop screw. Pins C . Previous owner removed it and put it back and now its not calibrated or did the calibration guessing or with wrong feeler gauges? Tighten the screw by turning it clockwise. or even jam the throttle). You must leave the connector connected,andus a back probe technique, to read the voltages. These settings adjust how much fuel, at varying . valve) closes this DP device (vacuum sent) after say 3 to 15seconds after a start) If not fix this first. 16 valve MPI only. Hint watch for drop outs.! 6) This method is called GO, NOGO and CAL. Replace the TBI by placing it back in the engine. How to time the distributor G16B (16V)? 500 or less) up to a max of (3000 to 6500 ohms), as you move throttle from min to max. Before calibration, there must not be thesegross errors: The TPS mounts to the TB (throttle body) side and measures TV actions, and reports them to the ECU. (on autoranging meters, it will tell you the scale its on just ofter the readings eg 3.5 k, means 3500 ohms the K ICON on the meter LCD means , times 1000) And either the IAC needs to open up or the throttle blade must be opened (is goal , 500 is spec. AKA: throttle angle tests (TBI G16A example) TPS Adjustment procedure 2005-2010 XPs: By: commanderjjones aka Jerry _____ TPS = Throttle Position Sensor: The TPS is located on the passenger side of the throttle body. I then drop the DASH pot, arm and the throttle opens and the PIN C goes to near 5 volts, (closed switch ) (to avoid this nasty EFFECT) DMM/DVM: meter set to 20k Ohm range: See Figure 2 above for pin locations. 5) case any are present) and reconnect the IAC electrical connector. Get. Tighten the screw by turning it clockwise. If you removed the TPS and didnt index the body TPS pins to the TPS actual pin sockets, none of this will work correctly. it is must be indexed correctly ! Myth#1: (all comments on a Hot engine) 5. This is the 89/90 steps for TPS calibration and idle speed, these 2 years are unique. allowing unmetered air to enter the engine, The throttle stop screw Pull the air duct off the throttle body. 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. The two numbers are dependent on each other so if you fix one, youve also fixed the other one. Complete step-by-step testing instructions. There are exceptions to that. It may accelerate smoothly, but lack power. (use a 6v, 9v or 12vdc battery as your supply , or a 5v power supply , really 3 to 12vdc works. ) Copyright 2023 Leaf Group Ltd. / Leaf Group Media, How to Adjust the TPS on a 1994 3.0 V6 Toyota Pickup. The Below internals of my TPS, are cracked, car will never idle. Lock down the TPS side screws. Tip-in as in your right foot tips in the throttle and engine hesitates a bit. This was. The TPS isinfamousto go intermittent first, then fail hard. If not, allhell breaks loosewith the driver (Max Surge) This is why we use the all 3 feeler gauges for calibration. if not the ground is bad. trouble codes thru the check engine light). (4vdc on TP pin) all injections cut. Your Equinox's throttle body controls the amount of air that enters the engine. Trouble code definitions. Transmission is a 4L80 automatic. Pin B, voltage must move, and bedirectly proportionalto your throttle actions ! unbolt that nut below (stud) and remove the DP for calibration. The throttle stop screws primary function is to Zero=zero opens the throttle vane 1.92 degrees when the lefthand stop screw is adjusted from 10 mV to 250 mV, however, the Motronic only reads 0.32 or 0.64 degrees. Throttle position sensor (TPS) circuit B: DK BLU (dark blue) wire and it connects to the A-15 terminal of the red PCM connector. (if 5vdc is wrong, the TPS will not work. The throttle shaft is somewhat flat at that point. Myths: (no more Code 44s now !) See hopeless. The ECU has a tendency to not see TP glitches (denouncing logic) and will cause hesitations, when advancing the throttle. You are cruising and you tip-in the throttle moreand it hesitates, then catches up! This is a bad TPS TP signal. 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. All pins on allMPI TPS look like this and rules and wire colors ! ThrottleAngle: (the Suzuki TP pin) or potentiometer, or variable resistor. The minimum air setting is what is used to describe the amount of air With the IAC valve Locate the throttle position sensor on the throttle body, and unplug the attached electrical connectors from it. on the engine (such as what would occur if the automatic transmission was It will never read zero ohms ever, like real gold contact switches would. I have seen new switches vary from 50 to 1000ohms (in the first .030 of travel.. the goes to infinity (and open circuit) 3. CCW= counter clock wise , CW , guess? Adjustment is made by rotating the TPS driver slightly clockwise to increase voltage. This photo clearly shows the 2 devices inside, the unit. (The Throttleanglepin, allows fast acceleration rich mode power enhancement and causes WOT (wide open throttle mode) and causes Unflood mode at crank time. Attach the negative (black) wire of a voltmeter to the vehicle's frame to ground the device. DO not open the TPS like I DID Below !, this is a destructive examination ! Vehicles Motors Vehicles use the Vehicles in the same manner as most automobiles. This short video covers the instillation and calibration of a new TPS unit. Push the multimeter pin into the TPS screw and check the voltage. IDLE SPEED (4-CYLINDER) as a secondary function to adjust the minimum air setting. is 5vdc when not at idle and near 0v when at idle. To start with, turn the key to the on position and then find Go EFI Tuning on the main menu and press enter. Join to discuss rebuilds, modifications, tech articles and more! Now the ECU will enter idle mode and activate the ISC system. Below is Throttle body shown up side down, setting the TPS the easy way, its near impossible to set on car, with the above bracket in place. Michigan. o2 sensor. The TPS should read between 4.0 and 5.5 volts. The 4l60e will not respond to manual shifting like the old non electronic . (corroded connectors after 20 years, no !) We do the 4 TPS tests below first, before Calibrationsteps hereto be sure its even working 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. The easiest way to adjust the Throttle Position Sensor (TPS) is to use the shareware program WinALDL. and kick down cables. It is not the device that determines, fuel rates (flow) at idle, cruise or WOT ! (I recommend testing it before calibrating the sensor ) : (off car tests) per the FSM, normal slack, they are never set tight (very dangerous if set tight. When the throttle is fully open, the TPS sends a signal to the car computer that controls fuel injection. (by people) connected, ground the diagnostic (ALDL) terminal (same as you would do to flash TBI, the 8 valve engine with black top valve cover . Also, the IDLE switch part is not a real gold zero ohm switch , it too is carbon, reading about300 or 500 ohms. The Howell TBI unit was installed by the PO. Turn the ignition off. Figure1 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. Turn the ignition ON, but do not try to start the engine. First of the throttle angle pin is not calibrated (the ECU auto calibrates that in software) and is a crude device. 1.8L DOHC J18 engine (or 2.0L J20) Sport Suzuki TPS calibration on the throttle body. How to find which engine you have or the parts attached to it? TPpin is the Throttle angle pin (wiper) of the TPS, not the idle switch. That means it can't calculate the fuel and air ratio. (hesitations). The 3 video tests (mp4) In side the TB , Throttle body is a Throttle Valve, TV. This program lets you connect your laptop to the ECM to conduct data logging sessions while driving the car. 1. In this case well be taking voltage readings directly from the connector at the TPS using a Digital Voltage Meter. trouble codes thru the check engine light). (ASE/SAE) (ISO, Im clueless) The engine is.030 over with a EFI cam and 9.5:1 compression with aluminum 63cc heads. (we cant burn air), ergo the TPS angle pot was invented. Basics Of The Throttle Position Sensor (TPS). this car runs like a rape date-will burn first and second easy and its an automatic. Why? Factory TPS calibration procedure for the 16valve MPI 92-98 Sidekick or Trackers. when you get the percentage number within parameter, youll also have the voltage within parameter and vice versa. (even glowing cherry red) Measure the TPS with the multimeter once more to make sure the new settings have been achieved. The screw is set with very tough loc-tite. The TBI only, Dash pot, has a spring inside, andpushes outward that plunger by default, and holds the throttle open with keys in pocket! (note no water pipes to the ISC on the left), 16 valve G16B1.6L MPI TPS fast checks then CALIBRATION procedures. Suzuki calls this the TP pin, but is known today at Throttle Angle. NOTE: On (A/T) models, connector terminals are identified by 1) Connect a battery of any kind, to from pin A do D. (pin A is plus pin) (using any cheap 9v smoke detector battery works) The throttle position sensor (TPS) circuits (wires) that we're gonna' be testing are: Throttle position sensor (TPS) circuit A: GRY (gray) wire and it connects to the F-14 terminal of the blue PCM connector. loosened the mounting screws unintentionally -- it happens) then minimum air should be adjusted. If it fails on TB and is good off body, , TPS was mounted WRONG ! The throttle position sensor is located on the throttle body. FYI: stop screw on the throttle body. The G16a/b TPS, has 2 parts, It is Ganged ! Hold the TPS in place and tighten the retaining screw with the Phillips-head screwdriver. Never expect zero when closed ,like most switches. it just has that low end stuuter. Icle > IAC Startup > IAC Park Position Using the software - Idle ICF (tachometer icon) > IAC Parked Selection The reading should be the same as the previous reading. Never hot wire any output pins on any ECU. CAL steps) TV means Throttle valve inside the TB the Throttle body. What is it, what does it do? need to adjust the throttle stop screw. Two things come to mind very quickly. The ECU now throws, DTC errors for the TPS. 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. The throttle stop screws primary function is to Adjust the TPS sensor by reading the ranges of the high and low increases and adjusting the bolt on the top of the sensor until all four readings are in the normal range according to the meter. Disclosure: I am not a mechanic. It is just some quick Checks,looking for the hard failsfirst. If the ECU is infailsafe modedue to a Dead MAF (MPI) or Dead (MAP)sensor, the ECU then uses the TPS tomimic this dead sensor, and now becomes the only (+ RPM) way to measure air flow. Connector unpluggedat theTPS 16v: (it has connector locks, be careful we cant buy new ones) Pull the pin out of the wire on the sensor. The connectors are held in place with locking tabs, so you'll need to use something like a flathead screwdriver or a small Allen key to release the tabs first. Say the 1991 car has a 1989 actual engine, (or parts) and not 1991 . End fast testing. it is a factory calibration for minimum air supply {tiny}. (after the key has been off for at least 10 seconds). The 8v is aTBI, throttle body injectiona.k.a. This page covers calibration or testing the TPS. Estimate does not include fees and taxes. The FSM instructions, are are linked in every section on calibation and does cover this step. In this case its showing 4.31 Volts. pin on the TPS, or you MAYblow upthe 8v ECU copper circuit trace, 16v is better protected. The throttle body injector Vehicles of a Vehicles helps control the throttle and maintain the Vehicles revolutions per minute, or rpm. Lower vacuum levels translate to less pressure differential between the (put the. Pin 1 Ground. I check that C to D is equal to or below 300 ohms throttle closed (if not it needs calibration) (G16A TBIDash potIS FULLY retracted) if infinity its out of calibration, if 300 or below its OK. 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. automatically learns the closed throttle voltage when the ignition is keyed on 1985-1992 Firebird 305 and 350 TPI. If the TPS goes bad it can make the machine run erratically, or cause a hesitation at certain rpm's. (gotsymptoms?) METER MADNESS: in software we think, so use 300 for best upper limit) +1 flashing? operated at normal road speeds (35mph or more). (or under of 5v is missing) Where is the "throttle adjusting screw" ? (but can if the ISC goes dead and other failures, prevent air flow to the engine or very weak fueling as this idle switch will shut down, the ISC) How do you adjust the volts for the tps? The IAC valve cannot be tested using conventional about 50 ohms or near 0volts) OFF means the switch reads, Infinity. electrical testing means. Even better is a scope on pin, B , testing both forglitches, as you advance the throttle, a TPS when worn, loves to GLITCH ! neutral (manual trans). BATTERY from A to D (plus on A) connected directly then add a resistor from B to D(minus battery side) this simulates a real ECU load. (or to the engines shinny metal) For a ground reference. Remove the TBI using an Allen wrench. There's nothing to adjust. PO= Previous owners, (mostly with no books or tools) Never ground out the +5vcd refr. You may see a Com Port error message. Connect the voltmeter red lead to this pin and place the black lead on a good engine ground. prevent the throttle blade from closing too far and getting wedged/stuck in the If your Ford Ranger has a bad throttle body, it can cause it to run terribly. 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. 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 TPS angles are not calibrated. The IAC works by bypassing the closed throttle plate, the valve allows air to circulate inside the car's combustion area and allows the vehicle to idle smoothly. so the engine idle speed obtains 550rpm in drive (auto trans) or 650rpm in (causing the idle switch to open , making calibrationIMPOSSIBLE) Seeing this aberrant glitch with some DMM can be very hard, as they are so slow to measure, and can miss the glitch. (some cars not this, one use real switches and many Technicians, know how those works, and my comment) More 5.2L, 5.9L Dodge Ram Diagnostic Tutorials. Rotate the sensor left or right until the voltmeter displays 0.50 volts. I probe pin C ,key Onno start,, and the Dash Pot is holding the throttle open now, (if not fix that now) and the voltage is 0vdc, ( 0.5v) On a running engine the idle switch reads 0v. Code 44s, and timing freeze fails to work (the jumper). is adjusted incorrectly (throttle being held open too far; more on this later), There is a problem with PRO GRADE. ,due to, toolateIDLE drop out or tooearlyidle release,. the TPS is out of adjustment or the sensor has failed. What Does a Throttle Position Sensor Do? 1 Throttle Angle Pot. Standard Ignition 3 Terminal Connector - S674. TEST 2: Making Sure The TPS Is Getting Power. (your meter manual shows these facts) on the left. ON THIS at all ! HACKED OPEN! You may cause the throttle to stick open. 2. This program lets you connect your laptop to the ECM to conduct data logging sessions while driving the car. Go/NoGo and Calibrate sizes. TPS is located on the other side of the throttle shaft. 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Directly from the connector connected, andus a back probe technique, to read the.! Your ECU control the fuel and air ratio crude device red lead this. Meter ( DVM set to ohms resistance starting on the left range 2000 )! Starting on the main menu and press enter at the TPS can crack inside ( see photo just above or! Mp4 ) in side the TB the throttle and engine hesitates a bit butterfly., DTC errors for the TPS angle pin is not the device that determines, fuel (... Throttle vane is actually open 2.20 degrees but the Motronic reads 1.6.... After a start ) if not, allhell breaks loosewith the driver ( max )... Is wrong, the unit Toyota Pickup 1985-1992 Firebird 305 and 350 TPI we cant burn air,... 44S now! if 5vdc is wrong, the throttle # 1: ( no more 44s. Tv means throttle valve inside the TB, throttle body auto calibrates that in we... 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Respond to manual shifting like the old non electronic Vehicles Motors Vehicles the..., when advancing the throttle body now! is adjusted incorrectly ( throttle being held open too far ; on... Cal steps ) TV means throttle valve inside the TB, throttle body ( corroded after... Get the percentage number within parameter, youll also have the voltage butterfly valve the Howell TBI was. Short video covers the instillation and calibration of a voltmeter to the ECM to conduct data logging sessions driving... The minimum air supply { tiny } now! because the ECU will enter idle mode and activate the system. Throttle body injector Vehicles of a Vehicles helps control the throttle position sensor ( TPS ) the. 5.5 volts sure its even working at all air should be adjusted IAC electrical connector meter... Another 1.28 degrees, the TPS, has 2 parts, it is just quick! The throttle shaft is somewhat flat at that point rotating the TPS sends a signal to the ECM to data... Complex because of the throttle and maintain the Vehicles in the throttle position (! That point the position of the TPS using a Digital voltage meter will not.... Pins on allMPI TPS look like this and rules and wire colors helps the! Position of the throttle body controls the amount of air that enters the engine when... Tps is out of adjustment or the sensor left or right until the voltmeter displays 0.50 volts are!, TV a factory calibration for minimum air supply { tiny } the multimeter pin into the TPS isinfamousto intermittent... The percentage number within parameter, youll also have the voltage number within parameter, youll have... Manuals manuals and do some reading ground reference out of adjustment or the parts attached to it not. Read between 4.0 and 5.5 volts,, TPS was not set with the feeler on. And 5.5 volts settings have been achieved hesitates, then fail hard open, the unit the! Engine hesitates a bit the 2k range 2000 ohms ), 16 valve G16B1.6L MPI fast... To find which engine you have or the sensor left or right until the voltmeter red lead to this and! Compression with aluminum 63cc heads the old non electronic TPS look like this and and. Working at all readings directly from the connector at the TPS should read between 4.0 and 5.5 volts actual,. ) Sport Suzuki TPS calibration and idle speed ( 4-CYLINDER ) as a secondary to. Runs like a rape date-will burn first and second easy and its an automatic too ;... Nut Below ( stud ) and remove the DP for calibration +1 flashing to the... Amount of air that enters the engine the Motronic reads 1.6 degrees the sensor has.! 1.8L DOHC J18 engine ( or parts ) and not 1991 ( 35mph or more.! At all Group Media, how to time the distributor G16B ( 16V ) once more to make the. The minimum air supply { tiny } or right until the voltmeter red lead to this pin place. The Vehicles in the engine that detects the position of the throttle body have been achieved in your right.! First of the throttle angle levels translate to less pressure differential between the ( the! Mostly with no books or tools ) never ground out the +5vcd refr 89/90 steps for TPS calibration and speed! Iac electrical connector ECU auto calibrates that in software ) and is device! Anything over 4.5v is what the computer sees as full throttle ( after key! So use 300 for best upper limit ) +1 flashing more Code 44s, and bedirectly proportionalto your throttle!. Better protected and does cover this step this and rules and wire colors and of! Po= previous owners, ( or parts ) and remove the DP for calibration keyed on Firebird... So if you fix one, youve also fixed the other side the...