Checking Power Supply Terminal

Check fuse 11 B/2. If the fuse is blown check the circuit after the fuse for a short-circuit to ground according to Short-circuit to ground, permanent faults .
Check the power supply to throttle unit #6. The voltage should be approximately battery voltage.

Checking Ground Terminal

Check the ground lead between throttle unit #5 and engine ground terminal ETM 31/91 for an open-circuit according to Open-circuit, permanent faults .
Check the throttle unit ground terminal for contact resistance and oxidation according to Contact resistance and oxidation .

Remedy as necessary

Other information

Power supply to electronic throttle module #6 is from fuse 11 B/2 via the system relay.
Ground terminal 31/91 for the electronic throttle module is located on the front of the cylinder block above the starter motor
For information about other signals, see Signal specification .
For further information about the circuit, see the relevant wiring diagram

Fig 1: Identifying Electronic Throttle Module Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Voltage Display

Courtesy of VOLVO CARS OF NORTH AMERICA.

Is the power and ground terminal OK?