Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2004 Saturn Ion Red LineFACTORY OEM SERVICE PROCEDURE

Control Module References

WARNING: This page is about a different car, the 2007 Saturn Ion Red Line, 2007 Saturn Ion 3, and 2007 Saturn Ion 2. However, it is still accessible from the selected car via links, so may be relevant.

Control Module	Schematic	Repair Instruction	Programming and Setup
Diagnostic System Check - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle Symptoms - Vehicle
Audio Amplifier	Radio/Navigation System Schematics	Amplifier Replacement	This device requires no programming or setup.
Body Control Module	Body Control System Schematics	Body Control Module Replacement	Body Control Module Programming and Setup
Communication Interface Module (OnStar ®)	OnStar Schematics	Communication Interface Module Replacement	OnStar Reconfiguration after communication interface module replacement
Digital Radio Receiver (DRR)	Radio/Navigation System Schematics	Digital Radio Receiver Replacement	Digital Radio Receiver Setup after DRR replacement
Electronic Brake Control Module (Antilock Brake System)	Antilock Brake System Schematics	Electronic Brake Control Module Replacement	Electronic Brake Control Module Programming and Setup
Engine Control Module	Engine Controls Schematics for the 2.2L (L61) engine or Engine Controls Schematics for the 2.4L engine	Engine Control Module Replacement for the 2.2L (L61) engine or Engine Control Module Replacement for the 2.4L engine	ENGINE CONTROL MODULE PROGRAMMING AND SETUP
Inflatable Restraint Passenger Presence System	SIR Schematics	Inflatable Restraint Passenger Presence System Replacement - Front (without Heated Seat)	Passenger Presence System Programming and Setup
Inflatable Restraint Sensing and Diagnostic Module (Supplemental Inflatable Restraint)	SIR Schematics	Inflatable Restraint Sensing and Diagnostic Module Replacement	Inflatable Restraint Sensing and Diagnostic Module Programming and Setup
Instrument Panel Cluster	Instrument Cluster Schematics	Instrument Cluster Replacement	This device requires no programming or setup.
Power Steering Control Module (Electric Power Steering)	Power Steering Schematics	Steering Column Replacement	Power Steering Control Module Programming and Setup
Powertrain Control Module	Engine Controls Schematics for the 2.0L engine	Powertrain Control Module Replacement for the 2.0L engine	POWERTRAIN CONTROL MODULE PROGRAMMING AND SETUP
Radio	Radio/Navigation System Schematics	Radio Replacement	Radio Setup after radio replacement
Transmission Control Module	Automatic Transmission Controls Schematics for the 4T45-E transaxle	Transmission Control Module Replacement for the 4T45-E transaxle	Transmission Control Module Programming and Setup

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.