G3516B Engines Caterpillar

The Electronic Control Module (ECM) has detected a positive voltage source on the output for the fuel shutoff valve. The most likely cause is one of the following conditions:

• The wiring harness has an open circuit.

• The fuel control relay has an open coil.

• There is a short circuit to the +Battery in the wiring for the fuel control relay.

Note: This code cannot be detected by the ECM when the output for the fuel control relay is ON. The output is normally ON when the engine control switch is in the START position and the engine rpm is greater than zero.

System Response:

No fuel is provided to the engine. The alarm output is activated. The code is logged.

Possible Performance Effect:

The engine will not start due to the lack of fuel.

Troubleshooting:

Test Step 1. Perform the following diagnostic procedure: "ECM Output Circuit (Fuel Control)"

Results:

• OK - STOP