Checking power ground to the adapter box

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 OFF Position

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off.
Connect Volvo Scan Tool (ST) wiring to data link connector (DLC).
Volvo Scan Tool (ST) cabling disconnected from adapter box.
Connect an ohmmeter between the 25-pin connector terminal:
- 23 (data link connector (DLC) side) and ground
- 24 (data link connector (DLC) side) and ground
- 25 (data link connector (DLC) side) and ground
Fig 2: Identifying Connector Terminals
Courtesy of VOLVO CARS OF NORTH AMERICA.

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

The ohmmeter should read 0 Ω for all readings.

OK
Refer to Checking adapter box signal ground
NOT OK
Refer to Fault-tracing information