Monitor Description

OUTLINE OF DIAGNOSIS 

Detect the EFI MAIN relay stuck to ON.

Judge as NG when ECM keeps operating for more than predetermined time although the EFI MAIN relay does not turn to OFF after ignition switch is turned to OFF.

COMPONENT DESCRIPTION 

The EFI MAIN relay controls current of coils by receiving instructions from the ignition switch and canister pump module to switch ECM to ON/OFF.

EXECUTION CONDITION 

GENERAL DRIVING CYCLE 

Perform the diagnosis only once when the enable conditions are established with the ignition switch OFF → ON.

DIAGNOSTIC METHOD 

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

Judgment value 

Time needed for diagnosis 

2500 ms

Malfunction indicator light illumination 

Illuminates when malfunction occurs in 2 continuous driving cycles.