Checking The Transmission Output Speed Sensor Signal

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS CORPORATION

• Ignition off
• Raise the car so that the drive wheels are clear of the ground
• Start the engine. Allow the engine to 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 the speed is updated.

  NOTE:

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

  NOTE:

  Diagnostic trouble codes (DTCs) may be stored in the ABS system when the rear wheels are stationary and the front wheels rotate. Erase any diagnostic trouble codes (DTCs) stored in the ABS system after fault-tracing.

  Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS CORPORATION

Was the speed updated? 

• YES 

  Refer to INTERMITTENT FAULT 

• NO 

  Refer to CHECKING WIRING AND SENSORS