Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CEM-3A04

Condition




The central electronic module (CEM) powers the fuel pump (FP) relay via an output. The diagnostic trouble code (DTC) is stored if the central electronic module (CEM) registers that the signal at the output is too high.
The fuel pump (FP) relay must not be activated for the diagnostic trouble code (DTC) to be stored.
The diagnostic trouble code (DTC) can be diagnosed at key positions I and II.

Substitute value
- None.

Possible source
- Short-circuit to supply voltage in the relay driver circuit.

Fault symptom[s]
- The fuel pump (FP) operates continuously
- Noise from the fuel pump (FP).