Diagnostic trouble code (DTC) information

Condition 

The control module performs a function test of the leak diagnostic system. A diagnostic trouble code (DTC) is stored if a faulty position or faulty movement of the leak diagnostic pump membrane is detected. For further information about leak diagnostics, see Leak diagnostic .

Substitute Value 

Leak diagnostics disabled.

Possible Source 

Signal too high: 

• Contact resistance in the terminals
• The vacuum for the leak diagnostic pump is too low or non-existent
• Defective leak diagnostic pump.

Signal too low: 

• Open-circuit in the power supply cable for the leak diagnostic pump
• Contact resistance in the terminals
• Defective leak diagnostic pump.

Faulty signal: 

• Contact resistance in the terminals
• The pump ventilation for atmospheric pressure is blocked
• Defective leak diagnostic pump.

Fault symptom[s] 

• Malfunction indicator lamp (MIL) lit.