Checking Components And Wiring

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: 

• To connect the breakout box, see CONNECTING THE BREAKOUT BOX. ACCESSORY ELECTRONIC MODULE
• To access or replace the Accessory Electronic Module (AEM) and connector, see ACCESSORY ELECTRONIC MODULE (AEM), REPLACING
• For information about signals, see SIGNAL DESCRIPTION. ACCESSORY ELECTRONIC MODULE (AEM)
• To fault-trace wiring and terminals, see CHECKING WIRING AND TERMINALS

Fig 1: Accessory Electronic Module Ground Terminals

Courtesy of VOLVO CARS CORPORATION

Fig 2: Identifying Ohm Meter

Courtesy of VOLVO CARS CORPORATION

• Continue 

  Refer to VERIFICATION