Checking the wiring and components
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 speed (RPM) sensor resistance. The resistance must be between 250-350 Ω.
Check the signal cables between engine control module (ECM) terminals 24 and 54 and engine speed (RPM) sensor terminals 1 and 2. Check for a short-circuit to ground and voltage, short-circuit to each other and for an open-circuit. See Open-circuit, permanent faults . Remedy if necessary.
HINT: With the ignition on, the voltage between the engine speed (RPM) sensor connector terminals 1 and 2 should be approximately 1.8 V with the reading taken at the ground terminal.
Other information
- To connect the breakout box, see Connecting the breakout box. EMS 2000 .
Was a fault found in the above fault-tracing?
- YES
Refer to Verification
- NO
Refer to Defective engine speed (RPM) sensor