Diagnostic Trouble Code (DTC) Information CPM-0318

Condition 

Fig 1: Identifying Fuel Pump

Courtesy of VOLVO CARS CORPORATION

The diagnostic trouble code (DTC) is stored if the control module registers that the signal on the cable from the fuel pump is too high. The heater cannot be activated until the diagnostic trouble code (DTC) has been erased.

The diagnostic trouble code (DTC) can be diagnosed when the heater is activated.

Substitute Value 

• None.

Possible Source 

• Short-circuit to supply voltage in the cable between the combustion preheater module (CPM) and the fuel pump
• Damaged fuel pump.

Fault symptom[s] 

• Poor heating in the passenger compartment
• The parking heater does not operate.