DRUM 3K1862 - Caterpillar

Conditions Which Generate This Code:
Illustration 1 g00669338
Illustration 2 g00664930
Typical display on the DDTThree bars of detonation are shown.Detonation has exceeded the normal limits. The timing control module has retarded the timing. This could be due to actual detonation or false detonation.Actual DetonationOne of the following conditions is causing actual detonation:
The Btu content of the fuel has increased.
The air/fuel mixture has become rich.
The inlet air temperature has increased.
The compression ratio has increased due to deposits.
The jacket water coolant temperature has increased.
The ignition timing has advanced.False DetonationOne of the following conditions is causing false detonation:
A mechanical failure is causing a vibration within the detonation frequency. This condition is causing false detonation. The vibration is detected by the detonation sensor.
An occurrence of pre-ignition
There is electrical noise in the system.System Response:The engine will not shut down unless the detonation levels increase to an unacceptable level. The yellow "DETONATION RETARDED TIMING" LED is illuminated while the timing is retarded.Test Step 1. Perform the following test: Detonation Retard and Detonation ShutdownResults:
OK - Stop.