Electronic Control System ISM and QSM11 Engines – 019-050   Fuel Shutoff Valve

Make sure the shutoff valve coil is the correct voltage (12 or 24 VDC).

The coil voltage and part number are cast into the terminal connection end of the coil.

Remove the solenoid wire.

Use the multimeter meter to check the coil resistance.

NOTE: If the solenoid shows 0 ohms, there is an electrical short in the coil.

If the coil resistance is correct, the assembly of the valve must be checked. If the coil resistance does not meet specification, the coil must be replaced. Refer to Procedure 005-043 in the ISM/QSM11 Troubleshooting and Repair Manual, Bulletin 3666322, for inspection of the valve.

Install the solenoid wire after completing the repair.

Make sure the shutoff valve coil is the correct voltage (12 or 24 VDC).

The coil voltage and part number are cast into the terminal connection end of the coil.

Turn the vehicle keyswitch on.

Use a multimeter to check the voltage to the coil.

The voltage must be the same as the battery voltage.

Turn the vehicle keyswitch off.

Disconnect the ring terminal from the fuel shutoff valve solenoid.

Remove the mounting capscrews securing the solenoid.

Remove the solenoid.

Install a new o-ring on the solenoid.

Install the solenoid and capscrews.

Connect the ring terminal to the fuel shutoff valve solenoid.