IAT And ECT Sensor Wiring Diagram (1993-1995 4.0L Jeep Grand Cherokee)

By: Abraham Torres-Arredondo
Created: 26 April 2014
Updated: 13 February 2024
Articl Id: 616

Intake Air Temp (IAT) And Engine Coolant Temp (ECT) Sensor Wiring Diagram (1993, 1994, 1995 4.0L Jeep Grand Cherokee)

APPLIES TO: This engine coolant temperature (ECT) and intake air temperature (IAT) sensor circuit wiring diagram applies to the following vehicles:

1993, 1994, 1995 4.0L Jeep Grand Cherokee.

The intake air temperature (IAT) and engine coolant temperature (ECT) sensors share Ground with several other sensors thru' the BLK/LT BLU wire.

PCM connector pin 4 is the source of the Ground that's fed thru' the BLK/LT BLU wire.

IAT And ECT Sensor Connector Problem

Engine Coolant Temp (ECT) Sensor Wiring Diagram (1993, 1994, 1995 4.0L Jeep Grand Cherokee)

NOTE: The most common problem encountered with the ECT (and IAT) sensor is the insulation peeling off of the wires and shorting together. The above photo, of 1995 Jeep 4.0L Grand Cherokee, is an actual example of the ECT sensor harness connector having this exact problem.

Where To Buy The IAT And ECT Sensors And Save

The best place to comparison shop and get an idea of how much your Grand Cherokee's IAT and ECT sensors cost (and how much you can save) is here:

29%

Standard Motor Products AX40 Air Temperature Sensor

$21.80

16%

Standard Motor Products TX43T Engine Coolant Temperature Sensor

$14.26

Original Engine Management 9364 Coolant Temperature Sensor

Not sure if the above IAT and ECT sensor 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.

More Jeep 4.0L Wiring Diagrams And Diagnostic Test Tutorials

You can find a complete list of wiring diagrams and diagnostic tutorials here:

Jeep 4.0L Index Of Articles.

Here's a sample of the tutorials you'll find there:

If this info saved the day, buy me a beer!