Diagnostic trouble code (DTC) information CEM-1A5E

Condition 

Fig 1: Identifying Control Module For Steering Wheel Angle Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

Diagnostic trouble codes (DTCs) are stored if the central electronic module (CEM) registers that communication with the steering wheel angle sensor module (SAS) is not operating.

Substitute Value 

• None.

Possible Source 

• No power supply to the steering wheel angle sensor module (SAS)
• Open-circuit in the ground lead to the steering wheel angle sensor module (SAS)
• Contact resistance in the terminals
• Open-circuit in the wiring for the CAN high speed network to the steering wheel angle sensor module (SAS)
• The steering wheel angle sensor module (SAS) 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 appropriate wiring diagram. 

Fault symptom[s] 

• The anti-spin warning lamp is lit (up to and including 2002 model year)
• General yellow warning lamp lit (from model year 2003 inclusive)
• No stability function
• Message in the display.