Checking the wiring and component: Notes
Check the Intake Air Temperature (IAT) sensor resistance.
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 intake air temperature (IAT) sensor connector terminal #1. Check for an open-circuit. Check for a short-circuit to supply voltage.
HINT: With the ignition on and the intake air temperature (IAT) sensor connector disconnected, the voltage between terminal #1 and ground must be approximately 5 V.
Check the ground lead between control module terminal #A60 (#A60) and intake air temperature (IAT) sensor connector terminal #2. Check for an open-circuit.
Remedy as necessary.
Other information
- To connect the breakout box / access the control module, see Connecting the breakout box
- For B5xx4T -2004, see Intake Air Temperature Sensor (IAT Sensor), replacing
- For B5xx4T 2005-, see Temperature and pressure sensors, replacing .
- For resistance values, see Resistance values
- For information about signals:
- For 5 cylinder turbocharged engines -2001, see Signal specification
- For 5 cylinder turbocharged engines 2002, see Signal specification
- For B5254T2 -2004, see Signal description
- For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see Signal specification (B5204T5, B5234T3, B5234T7 and B5244T3 -2004)
- For B5254T4 2004, see Signal specification (B5254T4 2004)
- For 5 cylinder turbocharged engines 2005-, see Signal specification .
- See Checking wiring and terminals .
- Continue
Refer to Verification