Home >> Volvo >> 2009 >> XC70 AWD L6-3.0L Turbo VIN 99 B6304T2 >> Repair and Diagnosis >> Relays and Modules >> Relays and Modules - Transmission and Drivetrain >> Relays and Modules - Differential >> Control Unit >> Diagrams >> Diagram Information and Instructions >> Diagram Legend >> 7/214 Heartbeat Sensor