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Diagnostic Procedure INSPECTION START CHECK FOR AIR IN FUEL FILTER. purge air from fuel filter. 2. Perform “DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCE- CHECK INPUT SIGNAL CIRCUIT. and needle lift sensor harness connec- 3. Check harness continuity between needle lift sensor connector terminal q 1 and ECM connector terminal 345 . Refer to wiring diagram. OK E NG Check the following: I Harness for open circuit If NG, repair harness or CHECK GROUND CIRCUIT-I. q 2 and ECM connector terminals 333 . Refer to wiring diagram. OK E NG Check the following: I Harness for open or If NG, repair harness or CHECK GROUND CIRCUIT-II. 346 and engine ground. Refer to wiring diagram. OK E NG Check the following: I Harness for open-circuit If NG, repair harness or CHECK NO. 1 INJECTION NOZZLE FOR q A NEF591 NEF690 NEF463 H H H H H H DTC P1240 NEEDLE LIFT SEN, DTC P1242 NEEDLE LIFT SE (RPM) TD27Ti EC-429 |