Checking the communication cable

WARNING: This page is about a different car, the 2002 Volvo C70, 2001 Volvo C70, 2000 Volvo C70, 1999 Volvo C70, and 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Ignition Switch ON Position

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Control Unit

Courtesy of VOLVO CARS OF NORTH AMERICA.

Connect the engine control module (ECM).
Ignition on.
Connect a voltmeter between data link connector (DLC) terminal 7 and ground.

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

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

The voltmeter should read approximately 9-11 V.

OK
Refer to Checking communication cable to adapter box
LOW
Refer to Checking for a short-circuit
HIGH
Refer to Checking for a short-circuit