Checking wiring and connectors

Check cable between control module #A69 and front heated oxygen sensor (HO2S) #1 for an intermittent open-circuit according to Short-circuit to ground, intermittent faults .

Check cable between control module #A18 and front heated oxygen sensor (HO2S) #2 for an intermittent open-circuit according to Short-circuit to ground, intermittent faults .

Check the cable between control module #A36 and ground for an intermittent open-circuit according to Short-circuit to ground, intermittent faults .

Other information

To connect the breakout box, see connecting the breakout box
To access the control module, see Replacing the engine control module (ECM)
To access/replace the heated oxygen sensor (HO2S), see Heated oxygen sensor (HO2S), replacing
For information about signals, see Signal specification .

Fig 1: Identifying 4-Bit connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.