Checking Power Supply And Ground Terminals For The Throttle Unit: Notes

Checking power supply terminal 

• Check fuse 11 B/21. 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 power supply to throttle unit #6. Voltage should be approximately battery voltage.

Checking ground terminal 

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

Remedy as necessary

Other information 

• Power supply to the electronic throttle module #6 is from fuse 11 B/21 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.

Are the power supply and ground terminals OK? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  See Fault-tracing information