Checking wiring

Check the cables between

control module terminal #A57 and camshaft position (CMP) sensor terminal #1
control module terminal #A58 and manifold absolute pressure (MAP) sensor terminal #3
control module terminal #A58 and air conditioning (A/C) pressure sensor terminal #3
control module terminal #B10 and fuel tank pressure sensor terminal #3.

Check for an intermittent short-circuit to supply voltage.

Other information

To connect the breakout box and access the control module, see Connecting the breakout box
To access and replace the control module see Engine control module (ECM), replacing
To access or replace the manifold absolute pressure (MAP) sensor, see Mass air flow (MAF) sensor, replacing
To access or replace air conditioning (A/C) pressure sensor, see Replacing pressure switch /Pressostat
To access or replace the fuel tank pressure sensor, see Fuel tank pressure sensor, replacing
For information about signals, see Signal specification
See Checking wiring and terminals. Intermittent faults .

Fig 1: Identifying Voltage Display

Courtesy of VOLVO CARS OF NORTH AMERICA.