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CM870 and ISX Engines – 019-050   Fuel Shutoff Valve

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Resistance Check

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Remove the solenoid wire.

Use the multimeter meter to check the coil resistance.

Use the multimeter to check the coil resistance.

Fuel System Shutoff Valve Solenoid Specifications
Voltage Resistance Minimum (Ohms) Resistance Maximum (Ohms)
6 VDC 1 5
12 VDC 6 15
24 VDC 24 50
32 VDC 42 80
36 VDC 46 87
48 VDC 92 145
74 VDC 315 375
115 VAC 645 735

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 Troubleshooting and Repair Manual, Signature/ISX/QSX15 Engines, Bulletin 3666239.

Install the fuel shutoff valve signal wire after completing the repair.

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Voltage Check

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Turn the keyswitch to the ON position.

Use a multimeter to check the voltage to the coil.

The voltage must positive (+) 12 VDC.

Turn the keyswitch to the OFF position.

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Remove

 TOC

Clean the fuel shutoff valve and surrounding area.

Disconnect the fuel shutoff valve signal wire from the engine harness.

Remove the mounting capscrews.

NOTE: The fuel shutoff solenoid is in the middle of the front and rear timing actuators.

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Install

 TOC

Install the new o-ring on the solenoid.

Install the solenoid and the capscrews.

Connect the fuel shutoff valve to the engine harness.

Torque Value:  4  n.m  [36 in-lb]

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Last Modified:  15-Dec-2004
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