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1995 f150 5.8l high idle voltage at tbs ground is good have the 5 volts, 1.9 volts when closed to 4.8 when open. any ideas?

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Posted on Jan 02, 2017

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autodr
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SOURCE: tps voltage high

is the tps adjustable on set screws? is something holding the throttle plate open a bit? throttle bore gummed up? a normal tps sweep is about .6 with throttle closed and about 5 volts wide open throttle(key on/engine off) 2nd check for vacuum leaks. what about mass airflow readings?

Posted on Nov 09, 2008

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SOURCE: 2004 Dodge Dakota

Replace your resistor if you haven't already. I had the same issue with mine, it only worked on high.

Posted on Dec 30, 2008

csmock132
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SOURCE: 89 chevy corsica 2.0L TBI has a very high idle any

Vacuum leak or defective Idle speed control motor

Posted on Jun 28, 2009

  • 521 Answers

SOURCE: battery voltage is very high when driving over 14

Voltage regulator is going bad. Have alternator tested or go ahead and have it replaced. Also this would be a good time to have the battery tested. Usually an alternator that is over charging will "cook" the battery causing it to not charge, not hold a charge, to losing the gel/electrolyte solution due to boil out.

Posted on Jul 17, 2009

outdoorsman5
  • 631 Answers

SOURCE: Help 95 ford contour obd-1 error 335

I was reading in one of my repair manuals and it says in there that there could be a block where the exhaust gas pressure sensor is. There could be a blocked inlet hose. Or it could be the ECM.

Posted on Sep 11, 2009

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1 Answer

Wh is my 1999 v6 camry engine reving


Locate the Idle Air Control (IAC) valve and verify that there is good hot coolant flowing to the valve. The valve has a built-in thermo element to open the valve further when the engine is cold.

2. If the coolant lines are good and hot, locate the 3-cavity connector on the IAC valve. The Yellow/Black (Y/B) wire is the ground for the closed windings of the valve. Back probe the Y/B wire and with the car running ground the wire, the idle should slow way down and possibly stall the engine. If it does not slow way down, look for a sticking IAC valve.REMOVE IAC VALVE, CLEAN WITH CARB. CLEANER, ACTUATE VALVE WITH A POWER PROBE TO OPEN AND CLOSE VALVE. REINSTAL.
1. At the idle speed control valve, use a volt meter to measure the voltage on the open and close winding. The open winding should be approximately 3 volts cranking and 5 volts when the key is released. The voltage should slowly climb towards 7.5 volts. The close winding will start out at 11 volts and slowly drop towards 8.5 volts.

2. Monitor the coolant sensor voltage using a volt meter. Do not use the scanner only.

3. Check that the power steering pressure switch is not on.

4. Check that the throttle position sensor signal voltage is .49 volts at closed throttle.

5. Use the scanner to check any other inputs to the computer.

Mar 30, 2015 | Cars & Trucks

1 Answer

94 Jeep Cherokee TPS - back feed


You are still getting high or low voltage at tps? What is the voltage and do you have a unstable idle? Put you + lead on terminal 3 and - lead on terminal 1 turn ignition on and check voltage to be at approximately 5 volts. You can also back probe with it connected at center wire and ground probe to a good ground at engine. Turn ignition on it should read between 0.20 - 0.90 slowly manually open throttle it should rise all the way to 4.5 voltd at full open. If its bad change tps if no 5.0 volts from pcm on first test check connections at pcm. The center tps connector supply wire comes from pin 22 and connection 3 ( which is 5 volt supply ) comes from pin 6. You should be able to back probe pin 6 turn ignition on and have 5 volts. If not 5 v brain has problem.

Sep 08, 2014 | 1994 Jeep Cherokee

2 Answers

Getting trouble code 106. What is solution for correcting this problem. Thank you. 2005 crossfire.


Chrysler codes,. only.

p0106,

on newer Chysler, cars they have many codes with 106, leaving out the prefix is bad idea.

Like U0102

or C0106?

P0106 is MAP performance failure. (that dont mean replace it)

the puter has no IDEA what is wrong, only that tests failed.

here are the conditions.

When Monitored and Set Condition



  • When Monitored: Engine running for at least 30 seconds and no fault in the throttle valve actuator.


  • Set Condition: Low limit: The Manifold Absolute Pressure (MAP) Sensor reading is below a calculated value when the throttle valve angle is greater than 80F for approximately 5 seconds. High limit: The MAP Sensor reading is greater than a calculated value that is determined by engine speed and throttle valve angle for approximately 5 seconds.




now in gringo or bar stool.

1: the puter brain saw you go near wide open throttle and the

map sensor (vacuum sensor) do not show new zero vacuum.

even a clogged air filter could do this, causing a false high vacuum







POSSIBLE CAUSES




MANIFOLD ABSOLUTE PRESSURE SENSOR SIGNAL CIRCUIT OPEN




MANIFOLD ABSOLUTE PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND




MANIFOLD ABSOLUTE PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE




5-VOLT SUPPLY CIRCUIT OPEN




5-VOLT SUPPLY CIRCUIT SHORT TO GROUND




5-VOLT SUPPLY CIRCUIT SHORT TO VOLTAGE




5-VOLT SUPPLY CIRCUIT SHORT TO SENSOR GROUND CIRCUIT




MANIFOLD ABSOLUTE PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO SENSOR GROUND CIRCUIT




MANIFOLD ABSOLUTE PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO 5-VOLT SUPPLY CIRCUIT




SENSOR GROUND CIRCUIT OPEN




ENGINE OIL SENSOR




MANIFOLD ABSOLUTE PRESSURE SENSOR




POWERTRAIN CONTROL MODULE






then the FSM goes to step by step tests. to find above reasons.

omitted. (too long )



the word low is ambiguous in all FSM.

it can mean, low plenum pressure,

or low vacuum (opposite)

and low voltage, its a pain in the xxx to find this fact out.

the map outputs high voltage for low vacuum (same as high absolute pressure)



the fsm tests are inane.

we check the voltage out of the map

at keyon

running

and wide open throttle for 1 second. just gun it and watch.

here is what it does.

left side is wide open throttle, idle is 20 inchs. key on is, WOT.

so, what is that

4.5v is keyon

start engine, get about 1.5v

the gun engine, then drop throttel to zero throttle fast

the causes,. huge vacuum about 24 inches, or 1v or less

this is a working MAP. if those tests pass.

the test (OBD2 monitor) fails for about not getting near 4vdc from MAP output pin, DOES THIS HELP?





8cbad531-1ef9-4812-919d-b64a619a8caf.jpg

Jul 07, 2014 | Cars & Trucks

1 Answer

Code PO401


Exhaust gas recirculation module check:


1. Note the Differential Pressure Feedback Exhaust Gas Recirculation (DPFE) sensor voltage through the scan tool or backprobe the Brown/Light Green (BN/LG) wire of the Exhaust Gas Recirculation System Module (ESM). Voltage should indicate a reading of 0.5-1.2 volts.

2. If the voltage of the DPFE sensor is out of range, low or high, disconnect the ESM and note that the voltage of the DPFE sensor circuit should indicate a reading of 5.0 volts.

3. If the DPFE sensor voltage is out of range connected and the reading shows 5.0 volts with the ESM disconnected, reconnect the ESM and verify that the Brown/White (BN/WH) wire shows a 5.0 volt reading and that the Grey/Red (GY/RD) wire shows to be a good ground, indicating a voltage of less than 0.1 volts. If these circuits check to be ok, replace the ESM due to a faulty DPFE sensor.

4. If the DPFE sensor voltage in step 1 is found to be ok, verify that both vacuum hoses to the ESM have full engine vacuum to them when it's running.

5. With the engine idling, backprobe the Brown/Pink (BN/PK) wire and hold it to ground. This should activate the Exhaust Gas Recirculation Vacuum Regulator (EVR) solenoid of the ESM. The EGR valve should open, the engine should run rough, and the DPFE sensor voltage should climb.

6. Replace the ESM for a faulty EGR valve, EVR solenoid, or DPFE sensor if the DPFE sensor or engine does not respond to ground activation of the BN/PK wire

Nov 10, 2013 | 2004 Ford Explorer

1 Answer

I have a 94 blazer and the check engine soon light came on and shortly after it started hesitating when i would hit the gas


Hi, the problem may be at the TPS or the MAP sensor. First extract the trouble code following instructions below. Then troubleshoot the indicated signals/sensors.


jturcotte_2348.gif



Fig. Fig. 1: ALDL connector-1994 models

Listings of the trouble for the various engine control system covered in this guide are located in this section. Remember that a code only points to the faulty circuit NOT necessarily to a faulty component. Loose, damaged or corroded connections may contribute to a fault code on a circuit when the sensor or component is operating properly. Be sure that the components are faulty before replacing them, especially the expensive ones. The Assembly Line Diagnostic Link (ALDL) connector or Data Link Connector (DLC) may be located under the dash and sometimes covered with a plastic cover labeled DIAGNOSTIC CONNECTOR.

  1. On all 1994 models the diagnostic trouble codes can be read by grounding test terminal B . The terminal is most easily grounded by connecting it to terminal A (internal ECM ground). This is the terminal to the right of terminal B on the top row of the ALDL connector.
  2. Only 1995 models equipped with a PCM use the OBD I system. All other 1995 and later models use the OBD II system. The diagnostic trouble codes on 1995 OBD I systems can be read by grounding test terminal 6 . The terminal is most easily grounded by connecting it to terminal 5 (internal ECM ground).
  3. Once the terminals have been connected, the ignition switch must be moved to the ON position with the engine not running.
  4. The Service Engine Soon or Check Engine light should be flashing. If it isn't, turn the ignition OFF and remove the jumper wire. Turn the ignition ON and confirm that light is now on. If it is not, replace the bulb and try again. If the bulb still will not light, or if it does not flash with the test terminal grounded, the system should be diagnosed by an experienced driveability technician. If the light is OK, proceed as follows.
  5. The code(s) stored in memory may be read through counting the flashes of the dashboard warning lamp. The dash warning lamp should begin to flash Code 12. The code will display as one flash, a pause and two flashes. Code 12 is not a fault code. It is used as a system acknowledgment or handshake code; its presence indicates that the VCM can communicate as requested. Code 12 is used to begin every diagnostic sequence. Some vehicles also use Code 12 after all diagnostic codes have been sent.
  6. After Code 12 has been transmitted 3 times, the fault codes, if any, will each be transmitted 3 times. The codes are stored and transmitted in numeric order from lowest to highest.
The order of codes in the memory does not indicate the order of occurrence.
  1. If there are no codes stored, but a driveability or emissions problem is evident, the system should be diagnosed by an experienced driveability technician.
  2. If one or more codes are stored, record them. Refer to the applicable Diagnostic Code chart in this section.
  3. Switch the ignition OFF when finished with code retrieval or scan tool readings.
jturcotte_2355.gif

MAP sensor tests:
TESTINGSee Figures 1, 2 and 3

jturcotte_2349.gif

Fig. Fig. 1: Typical Manifold Absolute Pressure (MAP) sensor wiring diagram (wire color, terminal identification/location may vary on certain models)

  1. Backprobe with a high impedance voltmeter at MAP sensor terminals A and C .
  2. With the key ON and engine off, the voltmeter reading should be approximately 5.0 volts.
  3. If the voltage is not as specified, either the wiring to the MAP sensor or the VCM may be faulty. Correct any wiring or VCM faults before continuing test.
  4. Backprobe with the high impedance voltmeter at MAP sensor terminals B and A .
  5. Verify that the sensor voltage is approximately 0.5 volts with the engine not running (at sea level).
  6. Record MAP sensor voltage with the key ON and engine off.
  7. Start the vehicle.
  8. Verify that the sensor voltage is greater than 1.5 volts (above the recorded reading) at idle.
  9. Verify that the sensor voltage increases to approximately 4.5. volts (above the recorded reading) at Wide Open Throttle (WOT).
  10. If the sensor voltage is as specified, the sensor is functioning properly.
  11. If the sensor voltage is not as specified, check the sensor and the sensor vacuum source for a leak or a restriction. If no leaks or restrictions are found, the sensor may be defective and should be replaced.
jturcotte_2350.gif

Fig. Fig. 2: Using jumper wires and a high impedance voltmeter test between MAP sensor terminals A and C with the key ON and engine off. The voltage should be approximately 5 volts


jturcotte_631.jpg

Fig. Fig. 3: Next test between MAP sensor terminals A and B with the key ON and engine off. The voltage should be approximately 0.5 volts

MAP sensor
jturcotte_632.jpg

Throttle position sensor test
TESTINGSee Figures 1, 2 and 3

  1. Backprobe with a high impedance voltmeter at TPS ground terminal and 5 volt reference signal terminal.
  2. With the key ON and engine off, the voltmeter reading should be approximately 5.0 volts.
  3. If the voltage is not as specified, either the wiring to the TPS or the VCM may be faulty. Correct any wiring or VCM faults before continuing test.
  4. Backprobe with a high impedance voltmeter at the TP signal terminal and the sensor ground terminal.
  5. With the key ON and engine off and the throttle closed, the TPS voltage should be approximately 0.5-1.2 volts.
  6. Verify that the TPS voltage increases or decreases smoothly as the throttle is opened or closed. Make sure to open and close the throttle very slowly in order to detect any abnormalities in the TPS voltage reading.
  7. If the sensor voltage is not as specified, replace the sensor.
jturcotte_2352.gif

Fig. Fig. 1: Common Throttle Position Sensor (TPS) wiring diagram (wire color, terminal identification/location may vary on certain models)





jturcotte_2353.gif

Fig. Fig. 2: Using jumper wires and high impedance voltmeter, test between the sensor ground and reference terminals, the voltage should be approximately 5 volts


jturcotte_2354.gif

Fig. Fig. 3: Next test between the sensor signal and ground terminals, verify that the TPS voltage increases or decreases smoothly as the throttle is opened or closed

Oct 01, 2011 | 1994 Chevrolet S-10 Blazer

1 Answer

Po123 04 kai


Hello www_ropesmor,

This code P0123 is Throttle position sensor circuit high input.

There four basic reasons for this code.

1. An open or short to ground between the TPS (throttle position sensor) and the ECM (Engine control module).
2. A short to battery voltage between TPS and the ECM.
3. A short between the TPS wires.
4. A faulty TPS.

See below for connector diagrams.

First, with scan tool monitor TPS with throttle closed voltage should be
I f you don't have a scan tool, back probe terminal 1with a volt meter to ground and you will see the voltage as outlined above otherwise follow the steps below.


1.Check to see if there is about 5 volts at the TPS; with engine off key on disconnect the TPS back probe the harness side terminal 3 to ground with a volt meter if there is about 5 volts go to step 2 if about 5 volts if not repair the 5 volt circuit.

2. Probe the harness side terminal 2 to chassis ground with a volt meter, if voltage above .02 repair circuit 2 short to voltage. If voltage is .02 volts or below go to step 3.

3. Probe the harness side terminal 1 to ground with volt meter if below .5 volts go to step 4 if not repair short to battery between TSP harness and ECM connector

4 Turn the ignition off and disconnect the ECM connector . With an ohm meter measure the resistance between the ECM (terminal C18) and TPS ground circuit it should be below 1 ohm. Measure the resistance between the ECM (terminal C8) and TPS signal circuit it should be below 1 ohm. If not repair the open circuit.

After faulty circuit is found and repaired clear code and verify repair.

netvan_160.png


netvan_161.png


I hope this helps.

Regards,

netvan

Aug 15, 2011 | 2004 Kia Optima

1 Answer

Code 22 on 95 gmc sierra what does that mean also t will start up but wants to die we replaced idle air control valve and also the throttle position sensor did not fix it i check vaccum lines all good it...


Trouble Code 22 indicates that the Throttle Position Sensor (TPS) is reading abnormally low. TPS volts should be close to 0.42 V at closed throttle and rise smoothly in about 0.02 volt increments to a maximum reading of about 4.85 volts at WOT.
Typical causes for this code include:

1) Maladjusted TPS
2) Defective TPS
3) No +5 volt reference to TPS
4) TPS-return to ECM is shorted to ground or to sensor ground
5) Defective ECM

Good luck, i hope this helps.

Jul 01, 2011 | 1995 GMC Sierra C1500

1 Answer

What are the electrical readings on the throttle positioning sensor


The throttle position sensor has both an idle contact switch and a basic 3 wire potentiometer that measures throttle angle opening. The idle switch and the throttle potentiometer share a ground wire.
To test the sensor first you have to verify that the wiring is intact by
1. Disconect the sensor and with a volt meter check the 4 wires. I have attached a wire diagram and picture of the pin layout to make it easy for you.
Pin 1 ( Yellow wire) is the PCM reference voltage. Specification is 5V
Pin 2 ( Red and Green wire) is the signal wire for the TPS. Specification is 5V
Pin 3 (Blue and white wire) is the idle switch. Specification 5V. Please note that this circuit is not actually used by this year Sedona so some vehicles are missing the wire.
Pin 4 (Black and yellow wire) is the ground. Specification: continuity to ground ( less than 1 ohm)
If the voltages are correct next you want to check the sensor.
1. Connect the throttle sensor connector.
2. Key on engine off
3.With a voltmeter measure terminal 2 of the sensor with the throttle closed, Specification is .2 to.4 volts.
4. With ta voltmeter monitor terminal 2 with the throttle fully open.The specification on terminal 2 is 4 to 4.4 V.
5. Slowly open and close the throttle while monitoring terminal 2 and make sure you have a smoot increase and decrease in voltage as the throttle is moved from close to open throttle and returned to idle.


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Jan 12, 2011 | 2005 Kia Sedona

1 Answer

When i remove vacuum line from map to throttle port and plug port it idles but if i open the port it stalls


The MAP is there to provide air pressure values from the inlet manifold to the engine control unit which in turn alters the pulse width of the fuel injection cycles. When the engine is at idle the throttle is closed and this creates vacuum conditions in the inlet plenum and as a result the voltage signal from the MAP should rise. Generally the MAP has 3 pins in the connecting socket, one pin is the 'reference' (usually 5 volts), the second pin is 'ground' and the third pin (usually the middle) is 'signal' voltage. At normal air pressure the MAP signal is about 1 volt. When vacuum is applied (idle throttle condition) the output signal rises by about 1 volt for every 5 inches of mercury pressure difference. At idle the voltage output will be high (4 volts) and the ECU responds by setting very short injection cycles. From what you have said is that the MAP at normal air pressure (as would be encountered when the throttle is open) is allowing the engine to idle just so long as no un-metered air gets in via the disconnected vacuum line. As soon as air enters the line the engine stalls. The stalling could be either due to too much air getting in making the air/fuel mix too lean or due to the loss of vacuum the fuel pressure regulator, creating higher fuel pressure in the fuel rail and therefore causing too much fuel to be injected per injection cycle. Check out the voltage signal from the MAP when applying a hand vacuum to it. Check the connector for dirt or corrosion. Check out the wiring from the connector back to the ECU for continuity.

Oct 29, 2010 | 1993 Chevrolet C1500

2 Answers

What does the 44 code mean on a 95 gmc 5.7 tbi truck


Code 44
oxygen sensor detecting lean exhaust

Nov 13, 2009 | 1995 GMC Sierra C1500

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