Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-3400

Condition




The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that the signal from the knock sensor (KS) is higher or lower than the normal range for a certain time.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute value
Safety retardation of ignition advance.
Knock control is disabled.

Possible source

Signal too high
- Short-circuit to supply voltage in the signal cable
- Open-circuit in the signal cable
- Contact resistance or oxidation in the connector for the knock sensor (KS)
- Damaged knock sensor (KS).

Signal too low
- Short-circuit to ground in the signal cable
- Damaged knock sensor (KS).

Fault symptom[s]
- Poor performance.