Checking the signal cable

WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Disconnecting Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off
Disconnect the connectors for the front (ECM-18) and rear (ECM-1C) heated oxygen sensor (HO2S).
Check the cable between heated oxygen sensor (HO2S) connector terminal 2 (control module side) and engine control module (ECM) connector terminal 63 (ECM-18) or terminal 65 (ECM-1C) for a short-circuit to ground according to Short-circuit to ground, permanent faults .

Remedy as necessary.

Fig 3: Identifying Heated Oxygen Sensor (HO2S) Connector Terminals
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 4: Identifying Ohmmeter
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 5: Identifying EMS2000
Courtesy of VOLVO CARS OF NORTH AMERICA.

Continue
Refer to Verification