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 ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Disconnecting Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off
Disconnect the connector for the atmospheric pressure sensor
Ignition on.
Connect a voltmeter between the atmospheric pressure sensor connector terminal 3 (control module side) and ground.

Fig 3: Identifying Atmospheric Pressure Sensor Connector Terminals
Courtesy of VOLVO CARS OF NORTH AMERICA.

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

The voltmeter should read 0 V.

OK
Refer to Checking the ground lead
NOT OK
Refer to Checking the signal cable

Check the cable between atmospheric pressure sensor connector terminal 3 (control module side) and engine control module (ECM) terminal 18 for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Remedy as necessary.

Fig 1: Identifying Atmospheric Pressure Sensor Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Voltage Display

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: EMS2000

Courtesy of VOLVO CARS OF NORTH AMERICA.

Continue
Refer to Verification