Diagnostic trouble code (DTC) information ECM-612B

Condition 

Fig 1: Identifying Camshaft Position Control

Courtesy of VOLVO CARS OF NORTH AMERICA.

The engine control module (ECM) checks the signal cable for the reset valve for the intake camshaft.

The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects an open-circuit in the signal cable for the reset valve.

The diagnostic trouble code (DTC) can be diagnosed at ignition on and with the engine running.

Substitute Value 

• None.

Possible Source 

• Open-circuit in the signal cable
• Open-circuit in the power cable
• Damaged camshaft reset valve.

Fault symptom[s] 

• Malfunction indicator lamp (MIL) lit.