Volvo S60 Series 3 Airbag Control Unit Repair

What is a Volvo S60 Series 3 airbag control unit?

The Volvo S60 Series 3 airbag control unit is the central safety unit that precisely activates all occupant restraint systems, such as airbags and seatbelt pretensioners, in the event of an accident. It processes signals from collision sensors in milliseconds, stores relevant crash data, and continuously monitors the entire system to ensure maximum safety and report faults via the SRS warning light.

This module, also known as the SRS control unit, is responsible for controlling and monitoring the entire passive safety system in your third-generation Volvo S60.

It is a crucial component that must react within fractions of a second in the event of an impact to provide protection for the occupants.

Why is the Volvo S60 Series 3 airbag control unit defective?

A Volvo S60 Series 3 airbag control unit repair is often necessary because the module stores "crash data" after an accident, preventing reactivation. Common causes include internal electronic defects, communication problems in the vehicle's network, or power surges, which can damage the sensitive electronics and cause system failure.

After an airbag deployment, the control unit must be reset or repaired, otherwise it will remain blocked and the airbag warning light will remain active.

Internal component failure, aging, or moisture can also lead to failure, which impairs the function of the entire airbag system and requires immediate diagnosis.

Common error codes for Volvo S60 Series 3 airbag control unit repair

During a Volvo S60 Series 3 airbag control unit repair, specific error codes occur that directly indicate problems with the control unit itself. These include communication errors (e.g., B1000, SRS-00D5), incorrect configuration (SRS-00D0), as well as internal circuit errors or power supply problems. A precise diagnosis is essential for resolving the problem.

• B1000 → Control unit communication error → Signal disturbance between airbag control unit and vehicle network.
• SRS-00D0 → SRS control unit incorrect configuration → Incorrect software parameterization or internal data inconsistency.
• SRS-00D5 → Communication error with the SRS control unit → Loss of connection to the central airbag control unit.
• SRS-0115 → Driver airbag inflator circuit open or shorted → Problem in the circuit, directly at the airbag module or its connection to the control module.
• Code 1 → Control unit error → Internal defect or malfunction of the airbag control unit.
• Code 3 → Test terminal or warning light wire shorted → Abnormal condition on diagnostic or warning light terminals.
• Code 4 → Airbag supply circuit (resistance too low) → Anomaly in the airbag circuit, possibly due to a short circuit.
• Code 5 → Airbag supply circuit (resistance too high) → Open or high resistance in the airbag circuit.
• Code 8 → Airbag or cable short-circuited to battery positive → Unintentional contact of the airbag cables with the power supply.
• Code 9 → Airbag supply circuit shorted to ground → Airbag wires contacted by vehicle ground.

What part numbers are available for the Volvo S60 Series 3 airbag control unit repair?

Correctly identifying part numbers is crucial for a successful Volvo S60 Series 3 airbag control unit repair. There are several validated OEM numbers from Volvo and suppliers (e.g., 31658440, P31318619) that fit the Series 3 models (2011-2018). This ensures compatibility and prevents incorrect purchases.

Using the correct OEM part number is critical to the functionality and safety of the airbag system.

Please note that used or new control units may often require VIN-specific programming to ensure full compatibility.

• 31658440 → Volvo → Original OEM → Commonly installed in S60 Series 3 models (approx. 2011-2018).
• 31476103 → Volvo → Genuine OEM → An alternative, equally suitable OEM number for the S60 Series 3.
• P31476261 → Volvo → Genuine OEM → Also suitable for S60; VIN programming is often required.
• 30715603 → Volvo → Genuine OEM → Another genuine Volvo part number for the airbag control unit.
• P31318619 → Volvo → Original OEM → Often found in the used spare parts section for the S60 Series 3.
• T11007230491 → Supplier (e.g. Autoliv/Bosch) → OEM code → This is a supplier code often associated with Volvo part number P31318619.