PSI sells Standalone Wiring Harnesses for GM Gen II, III, IV, & V LS/LT based engines and transmissions. These harnesses include the Gen II LT1/LT4, Gen III (24x) LS1/LS6 and Vortec Truck Engines as well as Gen IV (58x) LS2, LS3, LS7, & Vortec and GEN V LT / ECOTEC3 Engines. This sensor's primary job is to monitor the position of the throttle pedal and send an electronic signal to open the throttle body as you depress the gas pedal. Although this device often lasts the entire lifespan of your vehicle, there are occasions when it will fail, wear out, and need to be replaced.
How to do a GM throttle body relearn procedure
If you've replaced your GM electronic throttle body or you've disconnected the battery, you must do a GM throttle body relearn to establish a new baseline idle. Many car makers including GM started installing fly by wire electronic throttle bodies. In those vehicles, the 'gas' pedal isn't connected to the throttle body by a cable. The pedal simply provides an electronic signal, telling the throttle body how much acceleration you're requesting. A motor and gear reduction set inside the throttle body opens and closes the throttle plate to accomplish your request.
Over time, carbon buildup can accumulate around the throttle plate, changing it's 'home' position. If the buildup occurs gradually, the PCM 'learns' the new home position. But when your battery goes dead or you disconnect it to work on your vehicle, the PCM 'forgets' the adapative home position. If you replace the throttle body, the PCM won't know and will continue to use the adaptive settings as if the carbon buildup is still in place. If you don't do a relearn procedure, the PCM will 'hunt' for a new baseline idle. It will eventually learn it on its own, but it may take over a week of driving, during which time you will experience high and low idle speeds and possibly rough idle.
Here's the throttle body relearn procedure
1) Start the engine and let it idle in park for 3 minutes. During that period the idle may be higher idle than normal.
2) After 3 minutes, turn the engine off and leave it off for 60- seconds.
3) Start the engine again and let it idle in park for 3 minutes one more time. During these run periods you may see a check engine light. Scan for codes and if you get throttle body related codes, clear them.
4) If the idle speed is still off, drive the vehicle at speeds above 44-mph and operate several acceleration and deceleration cycles. Then repeat step #3 one last time. The division mods pc steam.
The idle should now be normal
©, 2015 Rick Muscoplat
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Fly By Wire Throttle Controller
Posted on by Rick MuscoplatCategories
‘Fly-by-wire' systems are being used in a lot of cars and pickups on the road today and one of the most common ‘Fly-by-Wire' systems in use is the one that graces most of the newer GM pickups: the Electronic Throttle Body.
Everything you read about these systems indicate that they are the best thing to ever happen to automobiles. One of the statements that really makes me laugh is this one: 'The ETC delivers outstanding throttle response and greater reliability than a mechanical connection'.
The problems I've had with a throttle cable are so few and so far inbetween that I don't recall when was the last time I replaced one.. When was the last time you replaced a throttle cable?
OK, enough of my ranting, in this article, I'll focus on the circuits of the Electronic Throttle Body and how to perform some basic tests on it. You may also be interested in the following tutorials:
- P0120 TP Sensor 1 Circuit Malfunction (With Electronic Throttle Body).
- P0220 TP Sensor 2 Circuit Malfunction (With Electronic Throttle Body).
Puedes encontrar este tutorial en Español aquí: Lo Esencial del Cuerpo del Acelerador Electrónico (GM 5.3L, 6.0L) (en: autotecnico-online.com).
Circuit Descriptions Of The GM Electronic Throttle Body
There are three major components of the GM Electronic Throttle Body and they are:
- Throttle body.
- Throttle Actuator Control (TAC) module.
- And Accelerator Pedal Assembly.
Fly By Wire Throttle Harley
In this section, we'll focus on the Electronic Throttle Body. As you have probably already observed, there are 8 wires sticking out of the Electronic Throttle Body.
Here's the throttle body relearn procedure
1) Start the engine and let it idle in park for 3 minutes. During that period the idle may be higher idle than normal.
2) After 3 minutes, turn the engine off and leave it off for 60- seconds.
3) Start the engine again and let it idle in park for 3 minutes one more time. During these run periods you may see a check engine light. Scan for codes and if you get throttle body related codes, clear them.
4) If the idle speed is still off, drive the vehicle at speeds above 44-mph and operate several acceleration and deceleration cycles. Then repeat step #3 one last time. The division mods pc steam.
The idle should now be normal
©, 2015 Rick Muscoplat
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Save
Fly By Wire Throttle Controller
Posted on by Rick MuscoplatCategories
‘Fly-by-wire' systems are being used in a lot of cars and pickups on the road today and one of the most common ‘Fly-by-Wire' systems in use is the one that graces most of the newer GM pickups: the Electronic Throttle Body.
Everything you read about these systems indicate that they are the best thing to ever happen to automobiles. One of the statements that really makes me laugh is this one: 'The ETC delivers outstanding throttle response and greater reliability than a mechanical connection'.
The problems I've had with a throttle cable are so few and so far inbetween that I don't recall when was the last time I replaced one.. When was the last time you replaced a throttle cable?
OK, enough of my ranting, in this article, I'll focus on the circuits of the Electronic Throttle Body and how to perform some basic tests on it. You may also be interested in the following tutorials:
- P0120 TP Sensor 1 Circuit Malfunction (With Electronic Throttle Body).
- P0220 TP Sensor 2 Circuit Malfunction (With Electronic Throttle Body).
Puedes encontrar este tutorial en Español aquí: Lo Esencial del Cuerpo del Acelerador Electrónico (GM 5.3L, 6.0L) (en: autotecnico-online.com).
Circuit Descriptions Of The GM Electronic Throttle Body
There are three major components of the GM Electronic Throttle Body and they are:
- Throttle body.
- Throttle Actuator Control (TAC) module.
- And Accelerator Pedal Assembly.
Fly By Wire Throttle Harley
In this section, we'll focus on the Electronic Throttle Body. As you have probably already observed, there are 8 wires sticking out of the Electronic Throttle Body.
When looking down at the Electronic Throttle Body's connector, the top row (from left to right) has 4 wires which are labeled from A to D (see photo).
The second row (bottom row) from left to right, the wires are labeled E to H (see photo).
and here are their specific descriptions:
- A: (Yellow wire) TAC Motor Control -1.
- B: (Black with White stripe wire) Low Reference.. Sensor Ground.
- C: (Brown wire) TAC Motor Control -2.
- D: (Black) Low Reference.. Sensor Ground.
- E: (Light Blue with Black wire) 5 Volt Reference.
- F: (Purple) TP Sensor 2 Signal.
- G: (Dark Green) TP Sensor 1 Signal.
- H: (Grey) 5 Volt Reference.
Let's turn the page and find out how the throttle body works in this system..
