Checking components and 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 flywheel and carrier plate for damage.

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 according to Short-circuit to ground, permanent faults . Check for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults . Check for a short-circuit to each other and for open-circuits according to Open-circuit, permanent faults . Remedy if necessary.

HINT: With the ignition on, the voltage between engine speed (RPM) sensor connector terminals #1 and #2 must be approximately 1.8 V with the reading taken at the ground terminal.

Try a new engine speed (RPM) sensor if no faults are found in the above fault-tracing.

Other information:

To connect the breakout box, see Connecting the breakout box. EMS 2000
To replace the engine speed (RPM) sensor, see Replacing engine speed (RPM) sensor .

Fig 1: Identifying Voltage Display

Courtesy of VOLVO CARS OF NORTH AMERICA.

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Refer to Verification