Diagnostic Procedure 4 — Hard to Start or Impossible to Start when the Engine is Cold (Cont'd)
EF & EC-531flowchartSR20DET engine (header tab).
TROUBLE DIAGNOSES
Diagnostic Procedure 4 — Hard to Start or Impossible to Start when the Engine is Cold (Cont'd)
1
(A) — from previous page
2
CHECK SPARK PLUGS. Remove the spark plugs and check for fouling, etc.
N.G.
Repair or replace spark plug(s).
O.K.
3
CHECK E.C.U. HARNESS CONNECTOR. Check the E.C.U. pin terminals for damage or poor connection of E.C.U. harness connector.
N.G.
Repair or replace.
O.K.
4
CHECK E.C.U. POWER SUPPLY AND GROUND CIRCUIT. Refer to page EF & EC-560.
N.G.
same as step 3
O.K.
5
TRY A KNOWN GOOD E.C.U.*
Trouble is not fixed.
INSPECTION END
Trouble is fixed.
Replace E.C.U.
NOTE
*: E.C.U. may be the cause of a problem, but this is rarely the case.