Checking cables

Check signal cable between ignition coil #1 and control module:

#A31 (#A31) (ECM 3300)
#A30 (#A30) (ECM 3310)
#A50 (#A50) (ECM 3320)
#A52 (#A52) (ECM 3330)
#A51 (#A51) (ECM 3340)

for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults

Other information

Connecting the breakout box/accessing the control module, see Connecting the breakout box .
To access/replace the ignition coil, see Replacing ignition coils .
For information about signals, see Signal specification .

Fig 1: Identifying Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Voltage Display

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Ignition Coil

Courtesy of VOLVO CARS OF NORTH AMERICA.