Diagnosis Circuit Inspection - Toyota 22R-E Service Manual

EG2–182

DIAGNOSIS CIRCUIT INSPECTION

Does malfunction, indicator lamp come on when
ignition switch is at ON?
Does malfunction indicator lamp 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.
Does malfunction indicator lamp go off when the
engine is started?
Check wiring between ECM and malfunction
Indicator lamp.
Is there diagnostic trouble code output when
DLC1 and terminals TE1 and E1 are connected?
YES
Does malfunction indicator lamp go off after repair
according to malfunction code?
YES
System 0K
ENGINE – MFI SYSTEM
YES
System Normal
Check wiring between
YES
ECM terminal E1 and body
ground.
BAD
Repair or replace.
YES
System Normal
BAD
Repair.
Check wiring between ECM terminal TE1 and D LC1
terminal TE1, and ECM terminal E1 and DLC1 terminal E1.
Further repair required.
Cancel out diagnostic trouble code.
Try another ECM.
Try another ECM.