Checking the Power Supply And Ground Terminal

Check the connector. Check for loose connections. Check for contact resistance and oxidation. Check the female and male sections of the connector. The terminals must not be damaged or pressed in.

Checking the 15-supply 

The 15-supply controls autostart of the phone. With the ignition on, the voltage must be approximately 12 V. When the ignition is off the voltage must be 0 V.

Check the 15-supply. Take readings between terminals #5 and #1 on the handsfree box. If the voltage is not approximately 12 V, check between terminals #5 and #1. Check for a short-circuit to ground.

Checking the 30-supply 

Check the 30-supply. Take readings between terminals #2 and #1 on the handsfree box. The voltage must be approximately 12 V. If the voltage is not approximately 12 V between terminals #2 and #1 on the handsfree box check for a short-circuit to ground.

Remedy as necessary.

Other information: 

• See Signal Specification
• See Contents .

Fig 2: Handsfree Box Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

Refer to Checking Contacts And Telephone Settings