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.

2011 Volvo C70FACTORY OEM SERVICE PROCEDURE

Infotainment Control Module (ICM), Signal Specification

General

NOTE:

It is important to check ground terminals before taking readings.

U=	DC voltage in volts (V)	U_low =	Voltage approximately 0 V
U_bat =	Battery voltage (V)

Fig 1: Identifying 2-Bit Connector

Courtesy of VOLVO CARS CORPORATION

CONNECTOR A

Terminal	Signal type	Ignition on	Other
#A1	Antenna signal	-	Input signal FMsub
#A2	Antenna signal	-	Input signal AM/FM main. Vehicles equipped with TMC - Phantom power supply for traffic message channel module (TMC). Vehicles without TMC - Phantom power supply for antenna amplifier.

Fig 2: Identifying Connector B

Courtesy of VOLVO CARS CORPORATION

CONNECTOR B

Terminal	Signal type	Ignition on	Other
#B1	30 supply	U = U_bat

Fig 3: Identifying Connector C

Courtesy of VOLVO CARS CORPORATION

CONNECTOR C

Terminal	Signal type	Ignition on	Other
#C1	MOST input signal	Optical input signal when the MOST network is activated
#C2	MOST output signal	Optical output signal when the MOST network is activated

Factory Service Tools

Use the Manual With the Right Hardware

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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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