Diagnostic Trouble Code (DTC) Information CEM-De2E

Condition

Fig 1: Identifying Power Seat Module (PSM)

Courtesy of VOLVO CARS OF NORTH AMERICA.

The diagnostic trouble code (DTC) is stored if the central electronic module (CEM) registers that communication with the power seat module (PSM) is not operating.

NOTE: In the event of CEM-DEXX diagnostic trouble codes (DTCs) being stored the central electronic module (CEM) must not be replaced; the diagnostic trouble code (DTC) indicates a communication fault in the Control area network.

The diagnostic trouble code (DTC) can be diagnosed when the ignition has been on for at least 10 seconds.

Substitute Value

None.

Possible Source

No power supply to the power seat module (PSM)
Open-circuit in the ground lead to the power seat module (PSM)
Contact resistance in the terminals
Open-circuit in the wiring for the CAN low speed network to the power seat module (PSM)
The power seat module (PSM) is not intended for this car (for example a used control module with different software/hardware).

HINT: If several diagnostic trouble codes (DTCs) are stored in the central electronic module (CEM) for communication faults with other control modules in the low speed network, this indicates a common fault in the Control area network, see the wiring diagram.

Fault symptom[s]

Automatic seat/door mirror operation does not function.