Checking Component And Wiring

Check the signal cable to the relay for the electric engine block heater. Check between accessory electronic module (AEM) terminal #B5 and the connector for the relay. Check for a short-circuit to ground.

Remedy as necessary.

Other information: 

• see CONNECTING THE BREAKOUT BOX
• see ACCESSORY CONTROL MODULE (AEM)
• see SIGNAL SPECIFICATION
• see RELAY ELECTRICAL ENGINE BLOCK HEATER, REPLACING
• see CHECKING WIRING AND TERMINALS

Fig 1: Accessory Electronic Module Ground Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

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  Refer to VERIFICATION