Checking the control module

HINT: The transmission control module (TCM) can malfunction if there has been a short-circuit to supply voltage in the solenoid STH circuit. Check the transmission control module (TCM) as follows: 

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Connectors

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off.
• Reinstall connectors, components etc.
• Raise the car so that the drive wheels are unimpeded.
• Start car.
• Read off current in solenoid circuit.
• Apply the brakes and shift the gear selector to position D.
• Depress accelerator pedal (AP) slowly.

  The current should decrease as the accelerator pedal (AP) is depressed.

  Fig 3: Identifying VCT2000

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Does the current decrease? 

• YES 

  Refer to Resetting the adaptation 

• NO 

  Refer to Replacing control module and programming