Checking control module connector

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.

Fig 2: Identifying Connector

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Fig 3: Identifying Control Unit

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Ignition off.
Engine speed (RPM) sensor disconnected.
Check control module connector for contact resistance and oxidation and remedy according to Contact resistance and oxidation
Control module connected.
Connect an ohmmeter between engine speed (RPM) sensor connector terminals 1 and 2 (engine control module (ECM) side).

Fig 4: Identifying 2-Pin Connector
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Fig 5: Identifying Ohmmeter
Courtesy of VOLVO CARS OF NORTH AMERICA.

The ohmmeter should read 15 - 25 kΩ.

OK
Refer to Fault-tracing information
NOT OK
Refer to Checking for an open-circuit