Checking transmission speed sensor signal

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off.
• Raise car so that drive wheels are unimpeded.
• Start the engine and let it idle.
• Shift gear selector to position D so that the drive wheels begin to rotate.
• Read off the transmission speed.

  Depress the accelerator pedal (AP) and check that engine speed (RPM) is updated.

  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:

  Ensure that the wheels are not rotating when the gear selector is moved.

  Fig 2: Identifying VCT2000

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Was speed updated? 

• YES 

  Refer to Intermittent fault 

• NO 

  Refer to Checking cables and sensors