Checking The Wiring And Component

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS CORPORATION

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

NOTE:
The intake air temperature (IAT) sensor is integrated in 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 using the VCT2000 (or appropriate scan tool).

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 5 cylinder turbocharged engines -2004, see SIGNAL DESCRIPTION
- For 5 cylinder turbocharged engines 2005-, see SIGNAL SPECIFICATION .
- For 6 cylinder engines -2004, see SIGNAL SPECIFICATION
- For 6 cylinder engines 2005-, see SIGNAL SPECIFICATION .
- For B5xx4T, see TEMPERATURE AND PRESSURE SENSORS, REPLACING
- For B6xx4T, see TEMPERATURE AND PRESSURE SENSORS, REPLACING
- For information on resistance values: COMPONENT SPECIFICATIONS
- see CHECKING WIRING AND TERMINALS
Fig 2: Identifying 4-Bit Connector
Courtesy of VOLVO CARS CORPORATION

Fig 3: Identifying VCT2000 Diagnostic Tool Symbol In VIDA
Courtesy of VOLVO CARS CORPORATION

Fig 4: Identifying Boost Pressure Sensor
Courtesy of VOLVO CARS CORPORATION

Continue
Refer to VERIFICATION