RING-METAL SEAL 3K1432 - Caterpillar

System Operation Description:Use this procedure to troubleshoot the electrical system if a problem is suspected with the circuit for one of the Pulse Width Modulated sensors (PWM sensors) or if one of the diagnostic codes in Table 1 is active or easily repeated.
Table 1
Diagnostic Codes Table
Description Conditions which Generate this Code System Response
106-3 Air Inlet Pressure Sensor : Voltage Above Normal The Electronic Control Module (ECM) has detected a frequency of less than 375 Hz for the sensor PWM signal. The code is logged.
The alarm output is activated.
The shutdown output is activated.
The engine is shut down.
106-4 Air Inlet Pressure Sensor : Voltage Below Normal The ECM has detected a voltage on the circuit that is less than 0.2 V for five seconds.
106-8 Air Inlet Pressure Sensor : Abnormal Frequency, Pulse Width, or Period The ECM has detected a frequency that