Diagnostic Trouble Code (DTC) Information ECM-900E

Condition 

Fig 1: Identifying Engine Control Module (ECM)

Courtesy of VOLVO CARS CORPORATION

The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers an internal malfunction.

The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute Value 

• The cruise control is disengaged when the malfunction is active
• The electronic throttle unit follows the pulse width modulation (PWM) accelerator pedal signal directly.

Possible Source 

• Software problem.
• Poorly charged battery or corroded connecting cables
• Damaged engine control module (ECM).

Fault symptom[s] 

• Malfunction indicator light (MIL) on.
• The engine misfires
• Cruise control does not function at all.