Checking wiring
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.
Check the engine control module (ECM) and atmospheric pressure sensor connectors for contact resistance and oxidation according to Contact resistance and oxidation .
Check in particular for damage, or loose terminal pins.
Check the signal cable between engine control module (ECM) terminal 18 and atmospheric pressure sensor terminal 3 for an intermittent short-circuit to supply voltage. Remedy according to Short-circuit to supply voltage, intermittent faults .
Check the voltage cable between engine control module (ECM) connector terminal 77 and atmospheric pressure sensor terminal 2 for an intermittent open-circuit. Remedy according to Open-circuit, intermittent faults .
Other information
- To connect the breakout box, see Connecting the breakout box. EMS 2000
- To replace the atmospheric pressure sensor, see Replacing the air conditioning (A/C) system pressure sensor .
- Continue
Refer to Information