Checking wiring and connectors

Check the intake air temperature (IAT) sensor connector. Check for contact resistance and oxidation. Check for loose connections.

Check the signal cable between control module terminal #A5 (#A5) and intake air temperature (IAT) sensor connector terminal #1. Check for an intermittent open-circuit. Check for an intermittent short-circuit to supply voltage.

Check the ground lead between control module terminal #A60 (#A60) and intake air temperature (IAT) sensor connector terminal #2. Check for an intermittent open-circuit.

Other information 

• To connect the breakout box / access the control module, see Connecting the breakout box
• To access or replace the intake air temperature (IAT) sensor, see Temperature and pressure sensor, replacing
• For information about signals on 5 cylinder engines, see 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 Contents .

Fig 1: Identifying Intake Air Temperature (IAT) Sensor Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Temperature Sensor - Intake (Turbocharged Engines Only, 2002-2004)

Courtesy of VOLVO CARS OF NORTH AMERICA.

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