97 GMC SAFARI MANUAL

So you need to be careful not to short these wires to power (12 Volts) or you may fry the PCM. One last observation, these three circuits go directly to the PCM. It's best to use a tool to pierce the wire, such as a wire-piercing probe (you can see what one looks like here: Wire Piercing Probe) to get to and test the signal. And that is to not probe the front of the female terminal of the TPS connector.

I'm gonna' make one very important recommendation to you when testing the signals of each wire. Ground Circuit (Provided by PCM internally).Throttle Position (TP) Signal Circuit.Talk about your center console, seats, door handles, upholstery, steering wheels or any other item in the cab of your van. Topics include door panels, and seat belts or the dash and carpet, trim, and seats. Below are the circuit descriptions of each: Discuss the cabin from the headliner to the carpeting of your Astro or Safari van. Each wire provides a specific type of signal to the TPS or to the PCM (Powertrain Control Module=Fuel Injection Computer). Like the majority of throttle position sensors on modern fuel injected cars and trucks nowadays, the GM TPS is a three wire sensor.

97 GMC SAFARI MANUAL

A repair manual for any remove and replace info you may need that this article does not cover.Ĭircuit Descriptions Of The GM TPS Sensor.

A multimeter (don't have a digital multimeter? Need to buy one? Click here to see my recommendations: Buying A Digital Multimeter For Automotive Diagnostic Testing).

You don't need any expensive testing equipment to test the TPS on GM vehicle.

Hesitation when you step on the accelerator pedal.

No power as you accelerate the vehicle.

Transmission does not shift out of second gear.

P0123:: Throttle Position Sensor Circuit High Voltage.

P0122:: Throttle Position Sensor Circuit Low Voltage.

P0121:: Throttle Position Sensor Performance.

TPS diagnostic trouble codes (DTCs) stored in the vehicle's computer's memory.

Symptoms Of A Bad Throttle Position Sensor (TPS)īeside the check engine light (CEL) being on and driving you nuts, your Chevy or GMC pick up (or SUV or van) may be experiencing one or several of the following symptoms: You can find this tutorial in Spanish here: Cómo Probar El Sensor TPS (1996-2004 GM 4.3L, 5.0L, 5.7L) (at: ). Also, in this section you'll find the info you'll need to successfully test and troubleshoot your TPS sensor or code. Every test has step by step instructions that will make diagnosing the TPS on your GM vehicle a breeze.Īt the bottom of this page you'll find a complete list of GM cars, pick ups, SUVs and Vans this test article applies to. You don't need a scan tool, since all three of the tests explained in this article are done with a simple multimeter. In three simple test steps, you can find out if the TPS sensor on your GM car or pick up or SUV or Van is bad.

97 gmc safari