Control modules

Fig 1: Control Module And Connectors

Courtesy of VOLVO CARS OF NORTH AMERICA.

Connecting and disconnecting control modules 

Always switch off the ignition before connecting and disconnecting control modules, connectors and the breakout box.

The ignition must be switched off when taking readings with an ohmmeter.

Fig 2: Identifying Precaution For Storing Control Module In High Temperature

Courtesy of VOLVO CARS OF NORTH AMERICA.

Temperature 

The control modules must not be heated to above 80 °C. Remove control modules when storing for example.

Arc welding 

Always disconnect the battery negative lead to prevent a short-circuit.

Position the welding ground as close to the welding site as possible, otherwise different ground potentials may be generated in different components.

When welding close to an electronic module, the unit must  be removed to avoid heat damage.

Replacement 

Do not replace a control module without checking its wiring and components. Otherwise the new component may be damaged in the same way as the old one.