C4.4 and C6.6 Industrial Engines and Engines for Caterpillar Built Machines Caterpillar

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

• The outputs from the primary speed/timing sensor and the secondary speed/timing sensor differ by more than 8 crankshaft degrees.

• The engine has been running for more than five seconds.

• Diagnostic code 0190-08 is not active.

• No 0041 diagnostic codes are active.

System Response:

If equipped, the warning light will come on. This code will not be logged.

The pressure in the fuel rail may be unstable and the engine may not run smoothly.

Test Step 1.

Check the timing of the fuel rail pump. Refer to Disassembly and Assembly, "Fuel Injection Pump - Install".

Results:

• OK - STOP