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.
2003 Volvo XC90 Base, FWDFACTORY OEM SERVICE PROCEDURE
Control Modules - Signal Specification For Diagnostic Procedures
- Fault-Tracing
- Signal Specification, Rear Electronic Module (Rem)
- Signal Specification, Abs Control Module
- Signal Specification, Audio Control Module
- Connecting The Breakout Box And Checking The Ground Terminal
- Notes
- Definitions
- The Audio Control Module, Green Connector
- Audio Control Module (AUM)/External Amplifier To Loudspeakers, Gray Connector
- Audio Control Module (To Aerial)
- Audio Control Module (Cable Between The Audio Module And The Amplifier)
- Audio Control Module (Cable Between The Audio Module And The Cd Changer/Navigation Unit)
- External Amplifier
- 10CD Changer
- Connecting The Breakout Box And Checking The Ground Terminal
- Signal Specification, Keypad Unit / CARPHONE Module (PHM)
- Connecting The Breakout Box And Checking The Ground Terminal
- Notes
- Definitions
- Keypad Unit /CARPHONE Control Module (PHM) (For Hands-Free Loudspeaker And Handset)
- Keypad Unit / CARPHONE Module (PHM) (To CARPHONE Box)
- CARPHONE Box (To Keypad Unit / CARPHONE Module (PHM)
- CARPHONE (For Hands-Free Microphone)
- Handset (For Keypad Unit / CARPHONE Module (PHM))
- Hands-Free Speakers (For Keypad Unit / CARPHONE Module (PHM))
- Connecting The Breakout Box And Checking The Ground Terminal
- Signal Specification, Rear Seat Entertainment Module (RSE), Generation 4.2
- Signal Specification, RTI
- Connecting The Breakout Box And Checking The Ground Terminal
- Notes
- Definitions
- RTI Control Module
- RTI Control Module (To TV Receiver)
- RTI Control Module (To Display)
- RTI Control Module (To Cd-ROM Changer)
- RTI Control Module (To Audio Unit)
- RTI Control Module (To GPS Antenna, Gray Connector)
- RTI Control Module (To TMC (Fm-MPX) Antenna, Brown Connector)
- RTI Control Module (To Fm-MPX Antenna, Green Connector)
- Display (To RTI Control Module And "Chassis")
- Cd-ROM Changer (To RTI Control Module And "Chassis")
- Cd-ROM Changer (To RTI Control Module)
- TV Receiver (To RTI Control Module)
- TV Receiver (To Reverse Camera And Video)
- TV Receiver (To Cd Player)
- TV Receiver (To TV Tuner A)
- TV Receiver (To TV Tuner B)
- Connecting The Breakout Box And Checking The Ground Terminal
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.
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