GEAR 3K4464 - Caterpillar

This procedure covers the following diagnostic codes:
Table 1
Diagnostic Codes for the Speed/Timing Sensors
J1939 Code CDL Code Code Description
(code descriptions may vary) Comments
190-8 190-8 Engine Speed : Abnormal Frequency, Pulse Width, or Period The Electronic Control Module (ECM) detects the following conditions:
An intermittent loss of signal or a complete loss of signal from the primary speed/timing sensor for 2 seconds
The engine has been running for more than 3 seconds.
3512 or 3483 diagnostic trouble codes are not active.
The warning light will come on and the diagnostic code will be logged.
The ECM will use the signal from the