Diagnostic Trouble Code (DTC) Information ECM-616D

Condition 

Fig 1: Identifying Variable Valve Timing (VVT) Unit

Courtesy of VOLVO CARS CORPORATION

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

The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that the signal from the reset valve is too low.

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

Substitute Value 

None.

Possible Source 

• Contact resistance in the terminals
• Short-circuit to ground in the signal cable
• Damaged camshaft reset valve.

Fault symptom[s] 

• Malfunction indicator lamp (MIL) lit.