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 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. Check for a short-circuit to ground according to Short-circuit to ground, permanent faults
- Check the ground lead between intake air temperature (IAT) sensor terminal # 2 and engine control module (ECM) terminal # 79. Check for an intermittent open-circuit according to Open-circuit, permanent faults
- Check the signal cable between intake air temperature (IAT) sensor terminal #1 and engine control module (ECM) terminal #48. Check the ground lead 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. Permanent 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