HD. Checking the Fuel MFI LH 2.4

HD. CHECKING THE MFI LH 2.4

HD1




Connecting The Test Box
Connect the test box and check connections to GND in accordance with P1-P2. P. Test Box, Signal Description
^ Continue with Checking the power supply HD2.

HD2




Checking The Power Supply
- Connect the control module to the test box.
- Install fuse 1 (or 31).
- Ignition on.
Connect the voltmeter between #35 and #5 (GND).
The voltmeter should read battery voltage.
Check that there is a voltage reading when the starter motor is operating as well.

If the reading Is incorrect
^ Check the wiring between #35 and the ignition switch via fuse 1 (or 31) for breaks in accordance with NA2. NA. Checking the Wiring

If this value is OK
^ Check the engine speed signal from DI HD3.

HD3




Checking The Engine Speed Signal From DI EZ 116 K
Connect a voltmeter between #1 and #5 (GND).
- Operate the starter motor.
The voltmeter should read 6-9 volts.

If this value is OK
^ Check the injector circuit HD4.

If the reading is incorrect
^ Check the wiring between MFI #1 and DI #17 for breaks in accordance with NA2. NA. Checking the Wiring

HD4




Checking The Injector Circuit
- Ignition on.
Connect a voltmeter between #18 and #17 (power GND).
The voltmeter should read battery voltage.

If the reading is incorrect:
^ Check the wiring to the injectors for breaks or grounding in accordance with NA3. NA. Checking the Wiring




Connect a voltmeter between #18 and #35 (battery voltage).
- Operate the starter motor.
The voltmeter should read 300-500 mV.

If the reading is incorrect:
^ Try using a new control module.