Checking the wiring and component: Notes

Check the intake air temperature (IAT) sensor resistance between terminals #1 and #2 on the boost pressure sensor.

Check the signal cable between engine control module (ECM) terminal #A5 (#A5) and boost pressure sensor terminal #2 for short circuit to ground.

HINT: With the ignition on and the boost pressure sensor connector unplugged, the voltage between terminal #2 and the grounding terminal should be 5 V, measured at the connector. Read off air temperature by clicking on the VCT2000 symbol. 

If no errors are found and the fault is permanent, replace the intake air temperature (IAT) sensor.

Remedy as necessary.

Other information: 

• See Connecting the breakout box
• For information on signals, 5-cyl: Signal specification
• For information about signals on 6 cylinder engines:
  • For 6 cylinder engines -2001, see Signal specification
  • For 6 cylinder engines 2002-, see Signal specification
  • For 6 cylinder engines -2004, see Signal specification
  • For 6 cylinder engines 2005-, see Signal specification .
• See Temperature and pressure sensor, replacing
• For information on resistance values: Component specifications
• See Contents

Fig 2: Identifying Boost Pressure Sensor Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 4: Identifying Boost Pressure Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

Refer to Verification