DTC ECM-400C

Diagnostic Trouble Code (DTC) Information





Condition
If no fault is detected in the leak diagnostic unit, the control module runs a leak diagnostic of the fuel tank system. Diagnostic trouble code (DTC) ECM-400C is stored if the engine control module (ECM) detects a leak of 0.5-1.0 mm (minor leak) or a leak that is >1.0 mm (major leak).

Substitute value
- None.

Possible source

Major leak:
- Fuel tank filler cap missing or not tightened
- Leakage that is 1 mm or greater in the fuel tank, fuel filler pipe, fuel tank filler cap, EVAP canister, canister purge (CP) valve, or in the hoses between these components The fuel gauge does not function (This fault is detected by the rear electrical module).

Minor leak:
- Leakage that is 0.5-1.0 mm or smaller in the fuel tank, fuel filler pipe, fuel tank filler cap, EVAP canister, canister purge (CP) valve, or in the hoses between these components
- The fuel gauge does not function (This fault is detected by the rear electrical module).

Fault symptom[s]
- Malfunction indicator lamp (MIL) lit.