Circuit test

The fault is caused by an open-circuit in one of the relay circuits in the lock unit. To determine in which circuit the fault is:

disconnect the connector at the lock unit

check the connectors. Check for contact resistance and oxidation

measure the resistance between terminals #1 and #2 on the cable connector.

Other information 

• To access and replace the lock unit, see Electric motor, fuel tank filler cover, replacing
• See Checking wiring and terminals .

Fig 1: Identifying Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

The ohmmeter should read 0 ohm. 

• OK 

  Refer to Checking the component 

• NOT OK 

  Refer to Circuit test continued