C4.4 Generator Set Engines Caterpillar

The Electronic Control Module (ECM) detects the following conditions:

• The 8 Volt supply is more than 8.8 Volts DC for more than one second.

• The ECM has been powered for more than three seconds.

• Diagnostic code 168-01 is not active.

System Response:

The ECM will log the diagnostic code. The warning light on the control panel will flash while this diagnostic code is active. An active diagnostic code may not cause any noticeable effect on engine response unless the voltage is above 12 or 13 Volts DC.

Possible Performance Effect:

The engine may be limited to low idle.

Troubleshooting:

If this diagnostic code is observed, check the associated wiring on the engine.

Test Step 1.

Refer to the Engine Electrical Schematic.

Results:

• OK - STOP