Checking the signal cable resistance to ground

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 Control Unit

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off.
DSA control module disconnected.
Engine control module (ECM) disconnected.
Breakout box connected to the engine control module (ECM).
FENIX 5.1
- On vehicles with automatic transmission: Disconnect the automatic transmission control module (TCM).
- Connect an ohmmeter between breakout box terminal 37 and ground.
EMS 2000
- Connect an ohmmeter between breakout box terminal 71 and ground.
Other information
- To connect the breakout box for FENIX 5.1, see Connecting the breakout box. FENIX 5.1 .
- To connect the breakout box for EMS 2000, see Connecting the breakout box. EMS 2000 .
Fig 3: Identifying Breakout Box
Courtesy of VOLVO CARS OF NORTH AMERICA.

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

The ohmmeter should read infinite resistance.

OK
Refer to Checking the signal cable for a short-circuit to supply voltage
NOT OK
Refer to Checking for a short-circuit