Checking the power 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 ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off.
Connect a voltmeter between connector terminal 1 on the heated oxygen sensor (HO2S) (engine control module (ECM) side) and ground.

Ignition on.

Fig 2: Identifying Heated Oxygen Sensor (HO2S) Connector Terminals
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Voltage Display
Courtesy of VOLVO CARS OF NORTH AMERICA.

The voltmeter should read battery voltage for 2 seconds immediately the ignition is switched on.

OK
Refer to Checking the signal cable
NOT OK
Refer to Checking the power cable

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off.
Check the cable between heated oxygen sensor (HO2S) connector terminal 1 (control module side) and system relay 2/14 base # 3 for an open-circuit according to Open-circuit, permanent faults .

Remedy as necessary.

Fig 2: Identifying Heated Oxygen Sensor (HO2S) Connector Terminals
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Ohmmeter
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 4: Identifying System Relay Base Terminals
Courtesy of VOLVO CARS OF NORTH AMERICA.

Continue
Refer to Verification