Throttle Position Sensor (TPS) Wiring Diagram (PART 1)
NOTE: The above TPS wiring diagram applies only to 1993, 1994, 1995 4.0L Jeep Grand Cherokee.
The TPS needs power and ground to create a throttle angle voltage signal. This power is in the form of 5 Volts DC and is supplied by the powertrain control module (PCM). The VIO/WHT wire of the throttle position sensor harness connector is the one that feeds this power to the sensor.
The PCM is also the one that supplies ground to the TPS on the BLK/LT BLU wire.
Here, in a nutshell is how the TPS works:
- With the throttle plate closed (like when the engine is just idling), the throttle position sensor creates a voltage of about .2 to .9 Volts DC.
- Once the throttle plate opens (like when you step on the accelerator pedal), the throttle position sensor reacts to the amount of throttle plate movement and creates and increasing voltage signal.
- At wide-open throttle (WOT), the TPS should output about 4.8 Volts DC.
- As you take your foot off the accelerator pedal, the throttle angle voltage signal returns back to the original voltage value.
- The throttle angle voltage signal is sent to the PCM on the ORG/DK BLU wire of the sensor's harness connector.
The following tutorial explains how to test the TP sensor, covered by this wiring diagram, with a multimeter: How To Test The TPS (1993-1995 4.0L Grand Cherokee).
Throttle Position Sensor (TPS) Wiring Diagram (PART 2)
NOTE: The BLK/LT BLU wire feeds ground (from the PCM) to several sensors (including the TPS).
Where to Buy the TP Sensor and Save
The best place to comparison shop and get an idea of how much your Grand Cherokee's TPS costs (and how much you can save) is here:
Not sure if the above TPS fits your particular Jeep Grand Cherokee? Don't worry, once you get to the site, they'll make sure it fits by asking you the particulars of your vehicle. If it doesn't fit, they'll find you the right one.
If this tutorial was helpful/informative, you can find a complete list of tutorials here: Jeep 4.0L Index of Articles.
Here's a sample of the tutorials you'll find there: