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Diagnostic Manual, Engines, Volume 2

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 3.1 LH Sequential Multiport Fuel Injectin System (LH-SFI)   >   36 Test

Hydraulic Test Program - Test (Injector Test)

Test step
Test scope
Test connection
Test condition
Nominal value
Possible cause/Remedy
1.0 Injectors
Leakage test

66 76
(1.25) (1.35)
Fuel rail with injectors removed.
Ignition: ON
Injectors must not drip. Replace dripping injectors.
1.1 Injectors
Operation and spray pattern test

66 76
(1.25) (1.35)
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 64 (-) and 65 (+).
Injectors must spray evenly (Figure 1). Replace defective injectors.