Diagnostic trouble code (DTC) information CEM-1A27

Condition 

The central electronic module (CEM) checks the output signal to the relay coil for the 15i power supply relay.

Diagnostic trouble code (DTC) CEM-1A27 is stored if the central electronic module (CEM) registers that the output signal to the relay coil is too low/missing.

Diagnostic trouble code (DTC) CEM-1A27 can be detected when the relay driver is not activated.

Substitute Value 

• None.

Possible Source 

• Relay missing
• Defective relay
• Contact resistance in the relay base.

Fault symptom[s] 

• General warning lamp lit
• Four-C does not work.