Diagnostic Trouble Code (DTC) Information ECM-3100

Condition 

Fig 1: Detecting The Reference Positions Of The Camshaft

Courtesy of VOLVO CARS OF NORTH AMERICA.

A diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that the signal from the engine speed (RPM) sensor is missing or if the calculated engine speed (RPM) from the engine speed (RPM) sensor is lower than the calculated engine speed (RPM) from the camshaft position (CMP) sensor.

The fault is diagnosed when the engine is running.

Substitute Value 

The control module uses the signal from the camshaft position (CMP) sensor if the camshaft position (CMP) sensor has been adapted.

Possible Source 

• Open-circuit in the signal cable or ground lead
• Short-circuit to ground or supply voltage in the signal cable
• Contact resistance in the terminals
• Damaged engine speed (RPM) sensor
• Damaged carrier plate.

Fault symptom[s] 

• The starter motor turns but the engine does not start
• The engine stops.