Tools And Equipment

The DIS/MoDIC as well as a reputable hand held multimeter can be used when testing inputs/ components.

It is best to make the checks at the ECM connection, this method includes testing the wiring harness.

Fig 1: Identifying Special Tools And Equipment

The correct Universal Adapter for the MS41.X application should be used (#88 88 6 614 410). This will ensure the pin connectors and the harness will not be damaged.

The interior of this Universal Adapter is shielded, therefore it is vital that the ground cable is connected to the vehicle chassis whenever the adapter is used.

The adapter uses a Printed Circuit board inside keeping the capacitive and inductive load to a minimum.

When installing the Universal Adapter to the ECM (located below the windshield on the passenger side of the engine compartment), make sure the ignition is switched off.

Fig 2: Identifying Universal Adapter

The Fuel Hose Clamp Tool (#13 3 010) can be used for isolating pressure faults. In addition, fuel loss can be reduced when changing the fuel filter while loosening clamps (1 and 2).

The Relay Bypass Switch (#61 3 050) must be used especially when fuel vapors are present! The switch eliminates the risk of electrical arcing.

When testing fuel pressure, the hand held fuel pressure gage (#13 3 060) can be used.

Caution: Residual fuel pressure may be present!

The DIS is equipped with a pressure measuring function, found in Measurement testing. The following adapters (Special Tool numbers) will be necessary:

#13 6 051
#13 6 055
#13 6 057

These adapters install "in line" in the fuel pressure hose.

Fig 3: Testing Fuel Pressure

For vehicles equipped with "quick-release" couplings, install special tool (#13 5 270) between the fuel filter (1) and pressure supply hose (2). This tool will couple to the DIS Pressure Adapter (3).

Fig 4: Identifying DIS Pressure Adapter

Later production fuel rails are equipped with a threaded adapter fitting (1).

This threaded adapter fitting allows Adapter #13 5 220 to be threaded on to the fuel rail and coupled to the DIS Pressure Adapter.

When testing the fuel injectors for leakage, use Special Tool #88 88 5 000 362. This tool pressurizes the injectors with air and the injector tips are submersed in water. If air bubbles are present, this indicates the leaking injector(s).

Fig 5: Testing Fuel Injectors For Leakage