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Diagnostic Manual, Engines, Volume 2

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 1.2 HFM Sequential Multiport Fuel Injectin/Ignition System (HFM-SFI)   >   36 Hydraulic Test Program - Test (Injector Test)


Hydraulic Test Program - Test (Injector Test)

Test step
DTC
Test scope
Test connection Test condition
Nominal value
Possible Cause/ Remedy 1)
1.0 Injectors
Leakage test


29
(1.29)
N3/4




39
(1.39)
Fuel rail and fuel injectors removed.
Ignition: ON
Fuel injectors must not drip. Replace dripping injectors,
2.0
2.0 Injectors
Operation and spray pattern test


29
(1.29)
N3/4




39
(1.39)
Ignition: ON
Hold each injector, one after another, into a container and, using the self-made test harness, manually activate the injector by connecting harness banana plugs to socket box sockets 32 (-) and 39 (+).
Fuel injectors must spray evenly
(Figure 1).
Replace defective injectors.
1) Observe Preparation for Test, see 22 .