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2004
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M45
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Repair and Diagnosis
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Engine Performance
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Engine Control System
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DTC P0171, P0174: Fuel Injection System Function
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Diagnostic Procedure
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8. Check Function Of Injectors
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With Consult-II
With Consult-II
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Start engine.
Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT-II.
Fig 1: Scan Tool Display - Active Test
Courtesy of NISSAN MOTOR CO., U.S.A.
Make sure that each circuit produces a momentary engine speed drop.