Checking The Wiring And Component
- 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
- For B5xx4T, see TEMPERATURE AND PRESSURE SENSORS, REPLACING
- For B6xx4T, see TEMPERATURE AND PRESSURE SENSORS, REPLACING
- For resistance values, see COMPONENT SPECIFICATIONS
- 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 .
- see CHECKING WIRING AND TERMINALS .
- Continue
Refer to VERIFICATION