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Home >> Volvo >> 2002 >> S80 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 55 (Central Electronic Module (CEM), Rear Electronic Module (Rem), Upper Electronics Module (UEM) - Diagnostic Trouble Codes - 1 Of 13) >> AEM-7A10: CARPHONE Mute Signal. Signal Too Low. Intermittent Fault (2001-2009) >> Signal too low >> Checking components and wiring >> Checking components and wiring

Checking components and wiring

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Check the signal cable (carphone mute). Check between accessory control module terminal #B12 and the radio connector. Check for a short-circuit to ground.

Remedy as necessary.

Other information: 

Fig 1: Identifying Accessory Electronic Module Terminals
GLL106164Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 2: Identifying Ohmmeter
GLL101042Courtesy of VOLVO CARS OF NORTH AMERICA.