Checking the wiring and component

Fig 1: Identifying Ignition Switch OFF Position

GLL101045

Courtesy of VOLVO CARS OF NORTH AMERICA.

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 may be defective if there gas been a short-circuit to supply voltage in the signal cable. Check this before replacing the sensor.

Check the signal cable between control module terminal #A5 (#A5) and boost pressure sensor terminal #2. Check for a short-circuit to supply voltage. Check for an open-circuit.

HINT: With the ignition on and the boost pressure sensor connector disconnected, the voltage between terminal #2 and ground must be approximately 5 V.

Check the ground lead between control module terminal #A60 (#A60) and boost pressure sensor terminal #1. Check for an open-circuit.

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

Remedy as necessary.

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 resistance values, see Component specifications
- For information about signals, see ELECTRICAL SYSTEM
- See Contents .
Fig 2: Identifying 4-Bit Connector
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Ohmmeter
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 4: Identifying Boost Pressure Sensor
Courtesy of VOLVO CARS OF NORTH AMERICA.

Continue
Refer to Verification