Checking wiring and components

Check cable between control module #A21 (#A21) and air conditioning (A/C) pressure sensor terminal 2 for an open-circuit according to Open-circuit, permanent faults , and a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Check cable between control module #A58 (#A58) and air conditioning (A/C) pressure sensor terminal 3 for an open-circuit according to Open-circuit, permanent faults , and a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Remedy as necessary.

Other information:

To connect the breakout box, see Connecting the breakout box .
To access/replace the control module, see Engine control module (ECM), replacing .
To access/replace air conditioning (A/C) pressure sensor, see Replacing pressure switch /Pressostat .
For information about signals, see Signal specification .

Fig 1: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Was a fault found in the wiring?