Checking wiring and connectors
WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition off
- Check the intake air temperature (IAT) sensor and engine control module (ECM) connectors for loose connections according to Loose connections (terminals) and contact resistance and oxidation according to Contact resistance and oxidation
- Check the signal cable between engine control module (ECM) terminal 48 and intake air temperature (IAT) sensor terminal 1 for a short-circuit to ground according to Short-circuit to ground, intermittent faults
- Check the ground lead between intake air temperature (IAT) sensor terminal 2 and engine control module (ECM) terminal 79 for an intermittent open-circuit according to Open-circuit, intermittent faults
- Check the signal cable between intake air temperature (IAT) sensor terminal 1 and engine control module (ECM) terminal 48. Check the cable between intake air temperature (IAT) sensor terminal 2 and engine control module (ECM) terminal 79. Check these cables for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults
- Remedy as necessary
- Try a new intake air temperature (IAT) sensor if no fault is found during the above fault-tracing.
Other information
- To connect the breakout box, see Connecting the breakout box. EMS 2000
- For information about signals, see Signal specification .
- Continue
Refer to Information