Checking Speed Signal From Combined Instrument Panel: Verification

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.

HINT: After carrying out the repair, check that the fault has been remedied.

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Connecting Control Unit

Courtesy of VOLVO CARS OF NORTH AMERICA.

HINT: An alternative to the following method is to drive the car on the road.
Ignition off
Raise car so that front wheels rotate freely. For AWD cars, all the wheels.
Remove wheels.
Engine idling
Select a gear so the wheels begin turning.
Read off the vehicle speed signal.
Check vehicle speed signal

If the speedometer is malfunctioning then carry out fault-tracing on the combined instrument panel first.

NOTE: When the rear wheels are stationary and the front wheels rotate, diagnostic trouble codes (DTCs) can be stored in the ABS system. Erase any diagnostic trouble codes (DTCs) stored in the ABS system after fault-tracing.

NOTE: For automatic transmissions, make sure the wheels are not moving when the gear selector is moved.

Fig 3: Identifying VCT2000
Courtesy of VOLVO CARS OF NORTH AMERICA.

Does the vehicle speed signal reading agree with the speedometer?

YES
OKAY: Troubleshooting has been completed.
NO
Refer to Information