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How to replace the PCM (Engine Computer) of a 1995 Jeep Grand Cherokee 5.2L

ECM Diagram for 1995 Jeep Grand Cherokee

How to replace the PCM (Engine Computer) of a 1995 Jeep Grand Cherokee 5.2L

The 1995 Jeep Grand Cherokee 5.2L Powertrain Control Module – PCM – is positioned in the engine compartment. PCM is also known as SBEC ( Single Board Engine Controller )  or an Engine Computer. It’s a pre-programmed digital computer that operates the fuel system, emission control devices, regulates the ignition timing, charging system, speed monitoring system, air-fuel ratio, air conditioning compressor, as well as the idle speed.

The programming settings of PCM can be changed depending on operating conditions of the vehicle: the PCM accepts input signals from various sensors and regulates the vehicle’s operations through various system components (PCM Outputs), based on the collected data.

After that information is received from the sensors, the PCM will set all the listed parameters accordingly:

  • ignition timing
  • manifold absolute pressure
  • throttle position
  • engine RPM
  • engine coolant temperature
  • AT transmission gear position
  • generator charge rate
  • speed
  • brake switch
  • air conditioning clutch switch
PCM Inputs PCM Outputs
A/C select (if equipped with factory A/C) A/C clutch relay


Auto shutdown (ASD) sense Auto shutdown (ASD) relay


Battery voltage


EGR valve control solenoid


Brake switch


EVAP canister purge solenoid


Camshaft position sensor signal


Fuel injectors
Crankshaft position sensor Fuel pump relay


Engine coolant temperature sensor


Generator field
Generator output


Idle air control (IAC) motor


Ignition circuit sense


Ignition coil


Intake manifold air temperature sensor


Check Engine lamp


Manifold absolute pressure (MAP) sensor


SCI transmit (DRB connection)


Overdrive/override switch


Speed control vacuum solenoid


Oxygen sensor


Speed control vent solenoid


Park/neutral switch (AT)


Power ground


SCI receive (DRB scan tool connection)


Sensor return


Signal ground


Speed control on/off switch


Speed control resume switch


Speed control set switch


Throttle position sensor


Vehicle speed sensor

The PCM has a voltage converter inside that regenerates battery voltage to a 5.0 Volt standard. That’s being used to power the crankshaft/camshaft position sensors, speed sensor, MAP sensor (Manifold Absolute Pressure Sensor) and TPS sensor (Throttle Position Sensor).

How To Remove the Powertrain Control Module (PCM) on 1995 Jeep Grand Cherokee 5.2L

The PCM is placed on the cowl panel on the right side of the engine compartment.

1995 Jeep Grand Cherokee 5.2 PCM.
1995 Jeep Grand Cherokee 5.2 PCM.


  1. Disconnect the negative battery cable.
  2. Remove the coolant reserve/overflow tank (mounted on 1
    bolt and 2 nuts).
  3. Delicately unplug the three 32–way connectors
    at PCM.
  4. Remove the mounting bolts (3).
  5. Pull the PCM out.


  1. Examine all the pins in the three 32–way electrical connectors for damage. Make sure that they are all ok.
  2. Install PCM. Tighten the mounting bolts to 1 N·m (9 in. lbs.) torque (3 bolts).
  3. Mount coolant reserve/overflow tank.
  4. Connect the negative cable back to the battery.

The Part Number 56026974. Order Here.

Part number (56026974)
*You can order the 1995 Jeep Grand Cherokee 5.2L PCM at our fs1inc store. We provide the best quality service at the lowest price possible. All our units come flashed and programmed, with Free Shipping and Lifetime Warranty.

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