Chrysler Module Replacement Instructions

Chrysler PCM Replacement Instructions

Professional guide for SKIM system and PCM installation

Chrysler Vehicle Coverage

These instructions apply to Chrysler, Dodge, Jeep, and Ram vehicles. Coverage includes domestic gasoline vehicles model year 1996 and newer.

1996 And Newer
Required for ETC Reset

Auto101 OBD2 Interface

After installing a new PCM, perform the Electronic Throttle Control (ETC) reset directly from your phone — no laptop or dealer visit needed.

  • ETC Reset — guided 3-step procedure via the app
  • Read and Clear DTCs — Standard OBD, PCM, BCM, and TIPM
  • Get Info — VIN and Calibration ID verification
  • Bluetooth plug-and-play, iOS and Android
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Step 1 — PCM Installation

Plug and Play Installation

Chrysler PCM replacement is a plug and play procedure. If you provided your VIN when ordering, the PCM arrives pre-programmed with your vehicle's VIN and is ready to install.

In most cases, simply disconnect the battery, swap the PCM, reconnect the battery, and start the vehicle.

Step 2 — SKIM Check Before Installing

Review This Before Installation

SKIM (Sentry Key Immobilizer Module) is Chrysler's anti-theft system. It communicates with the PCM to verify the key before allowing the engine to start. In certain situations, the SKIM module must be removed before installing the new PCM.

When SKIM Removal is Required

You must remove the SKIM module before installing the new PCM if any of the following apply to your vehicle:

  • VIN was not provided when ordering — the PCM VIN cannot be updated and will not match the vehicle
  • You want to disable the SKIM security system — SKIM delete is required for this
  • The SKIM module in the vehicle was previously replaced with one from a different vehicle (mismatched VIN)

Critical Warning

If any of the situations above apply and the SKIM module was not removed before installing the new PCM, the vehicle will not start. The security system will prevent the engine from cranking.

Always verify your situation before installation to avoid this issue.

How to Detect a Replaced SKIM Module

The Two-Key Sign

A common indicator that the SKIM module was previously replaced with a mismatched unit is having two different keys for the same vehicle:

One key locks and unlocks the doors
A different key is needed to start the engine

If this applies to your vehicle, the SKIM module must be removed before installing the new PCM.

Quick Reference

Standard Installation

When: VIN was provided, SKIM module is original and matches vehicle

Process: Disconnect battery — install PCM — reconnect battery — start vehicle

SKIM Removal Required

When: Any of the three situations listed above apply

Process: Remove SKIM module first — then install PCM — vehicle will start without security check

Step 3 — ETC Reset (If Needed)

Electronic Throttle Control Reset

After installing a new PCM, the Electronic Throttle Control (ETC) system may need to be recalibrated. If you experience rough idle, throttle response issues, or a throttle-related warning light after installation, perform the ETC reset using the Auto101 App.

Before Starting ETC Reset

Ignition must be ON, engine must be OFF. You will be prompted to press the gas pedal to the floor and then release it during the procedure. Follow the app's on-screen instructions exactly.

How to Run ETC Reset via the App

1
Plug in the Auto101 OBD2 Interface Connect to the OBD2 port (under the dashboard, driver's side). Turn ignition to ON — do not start the engine.
2
Open the Auto101 Pro App Navigate to Chrysler Diagnostic Tool. Scan for your device and select it from the list.
3
Tap "Get Info" first Always verify the connection is solid before running any procedure.
4
Tap "ETC Reset" The app will initialize the throttle body communication. When prompted, press the gas pedal fully to the floor and hold it, then tap OK in the app.
5
Release the pedal when prompted The app will ask you to release the gas pedal, then tap OK to finalize the calibration.
6
Cycle the ignition Turn ignition OFF then back ON. The ETC reset is complete. Start the vehicle and verify normal throttle response.

Get the Auto101 OBD2 Interface

One device for everything

Auto101 OBD2 Interface

The only tool you need for Chrysler ETC reset, DTCs, and diagnostics — all from your phone.

  • ETC Reset — 3-step guided throttle calibration
  • Read DTCs — Standard OBD, PCM, BCM, and TIPM codes
  • Clear DTCs — all accessible Chrysler modules
  • Get Info — VIN and Calibration ID
  • Also covers Ford PATS, GM relearn, and more
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Important Notes

SKIM System Overview

SKIM (Sentry Key Immobilizer Module) verifies the transponder key signal before allowing the PCM to start the engine. A mismatch between the PCM and SKIM will result in a no-start condition — the engine will crank but not fire.

VIN Matching

Always provide your VIN when ordering. The PCM arrives pre-programmed with your vehicle's VIN. If the VIN is not programmed or does not match, the vehicle may not start or may run incorrectly.

ETC Reset Timing

Do not rush the pedal steps. Hold the gas pedal firmly to the floor when prompted and wait for the app to confirm before releasing. The app sends keep-alive signals automatically while waiting for your input.

Not Sure About Your Situation?

If you are uncertain whether SKIM removal is required for your specific vehicle, contact us before installation at contact@auto101.net — we are happy to help.