Inspection Of Diagnosis Circuit - Toyota 22R-E Service Manual

Does Malfunction Indicator Lamp come
on when ignition switch is at ON?
Does MIL come on when ECM terminal W
is grounded to the body?
Check bulb, fuse and wiring between ECM
and ignition switch.
BAD
Repair or replace.
2.
Does MIL go off when the engine is started?
Check wiring between ECM and MIL.
Is there diagnostic trouble code output
when DLC 1 terminals TE1 and E1 are
connected?
YES
Does MIL go off after repair according
to malfunction code?
YES
System OK
ENGINE – MFI SYSTEM

INSPECTION OF DIAGNOSIS CIRCUIT

YES
System Normal
Check wiring between
YES
ECM terminal E1 and
body ground.
Repair or replace.
YES
System Normal
BAD
Repair.
Check wiring between ECM terminal T and
DLC1 terminal TE1, and ECM terminal E1
and DLC 1 terminal E1.
Further repair required.
Cancel out diagnostic trouble code.
Try another
ECM.
BAD
Try another
ECM.
EG1–121