Check wiring between ECM terminal T and
DLC1 terminal TE1, and ECM terminal E1
and DLC 1 terminal E1.
Is there diagnostic trouble code output
when DLC 1 terminals TE1 and E1 are
connected?
Does MIL come on when ECM terminal W
is grounded to the body?
Check bulb, fuse and wiring between ECM
and ignition switch.
Does Malfunction Indicator Lamp come
on when ignition switch is at ON?
INSPECTION OF DIAGNOSIS CIRCUIT
Does MIL go off when the engine is started?
Does MIL go off after repair according
to malfunction code?
Check wiring between ECM and MIL.
Check wiring between
ECM terminal E1 and
body ground.
Cancel out diagnostic trouble code.
Further repair required.
Repair or replace.
Repair or replace.
Try another
ECM.
Try another
ECM.
System Normal
System Normal
System OK
Repair.
BAD
YES
BAD
YES
YES
BAD
YES
YES
2.
–ENGINE MFI SYSTEM
EG1–121
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