Checking power supply and ground terminal, engine control module (ECM)
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.
Checking the power supply
- Check fuse 11 the integrated relay/fusebox in the passenger compartment. If the fuse is blown, check the circuit after the fuse. Check for a short-circuit to ground according to Short-circuit to ground, permanent faults
- Check fuses 12, 17 and 18 in the integrated relay/fusebox in the engine compartment. If the fuse is blown, check the circuit after the fuse. Check for a short-circuit to ground according to Short-circuit to ground, permanent faults
- Check the power supply to terminal #29. The voltage should be approximately battery voltage with the ignition on
- Check the power supply to terminal #66. The voltage should be approximately battery voltage for 2 seconds after the ignition is switched on
- Check the power supply to terminal #30. The voltage should be approximately battery voltage with the ignition on or off
- Remedy as necessary.
Checking the ground terminal
- Check the ground lead at engine control module (ECM) terminals #3, #28, #33 and #67. Check for an open-circuit according to Open-circuit, permanent faults
- Check the ground terminal on the engine control module (ECM). Check for contact resistance and oxidation according to Contact resistance and oxidation .
Remedy as necessary
Other information
- To connect the breakout box, see Connecting the breakout box. EMS 2000
- For further information about the circuit, see the relevant wiring diagram
- To access or replace the relay or fuse, see the inside of the cover on the engine compartment relay/fusebox or the appropriate Wiring Diagram .
Was a fault detected?
- YES
OKAY: Troubleshooting has been completed.
- NO
Refer to Information