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Home >> Volvo >> 2004 >> S80 Base, 2.5 59, FWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control Module (ECM) Diagnostic Trouble Codes - 9 Of 11 >> ECM-720A: Immobilizer Communication. Faulty Signal. Intermittent Fault (B5254T2; 2004) >> Faulty signal. Intermittent fault >> Checking components and wiring

Checking components and wiring

The immobilizer function is integrated in the central electronic module (CEM).

The engine control module (ECM) has previously registered a fault in the communication between the immobilizer and the engine control module (ECM), but has detected that this fault is no longer active.