ROTOR AS-PUMP 9Y5175 - Caterpillar

Diagnostic codes alert the operator that a problem in the electronic system has been detected. Diagnostic codes also indicate the nature of the problem to the service technician. The Caterpillar Electronic Technician (ET) is a software program that is designed to run on a personal computer. Diagnostic codes may be viewed on a personal computer that has Cat ET software. Diagnostic codes consist of the module identifier (MID), the component identifier (CID), and the failure mode identifier (FMI).Module Identifier (MID) - The MID is a code with two or three digits that indicates the electronic module which generated the diagnostic code. The MID for the Electronic Control Module (ECM) is 36. The MID for the Integrated Temperature Sensing Module (ITSM) is 111. Some electronic displays do not display the MID because the module which generates the code is obvious.Component Identifier (CID) - The CID is a number with three or four digits. The CID indicates the component that generated the code. For example, the CID number 0017 identifies the fuel shutoff valve.Failure Mode Identifier (FMI) - The FMI is a two digit code that indicates the type of failure. Table 1 is a list of the failure mode identifiers that are adapted from the "SAE J1587" standard.
Table 1
Failure Mode Identifiers
FMI Description of Failure
00 "Data valid but above normal operating range"
01 "Data valid but below normal operating range"
02 "Data erratic, intermittent or incorrect"
03 "Voltage above normal or shorted high"
04 "Voltage below normal or shorted low"
05 "Current below normal or open circuit"
06 "Current above normal or grounded circuit"
07 "Mechanical system not responding properly"
08 "Abnormal frequency, pulse, or period"
09 "Abnormal update"
10 "Abnormal rate of change"
11 "Failure mode not identifiable"
12 "Bad device or component"
13 "Out of calibration"
14 "Not used"
15 "Not used"
16 "Parameter not available"
17 "Module not responding"
18 "Sensor supply fault"
19 "Condition not met"
20 "Not used" Note: Do not confuse diagnostic codes with event codes. For information on event codes, see Troubleshooting, "Troubleshooting with an Event Code".Illustration 1 represents the operating range of an oil temperature sensor. The diagram is a reference. Do not use the diagram to troubleshoot the oil temperature sensor.
Illustration 1 g00791619
Typical operating range of an oil temperature sensor
(1) In these areas, the output voltage of the sensor is too high or too low. The output is outside of the normal range. The electronic problem will generate a diagnostic code.
(2) In this area, the oil temperature above 102 °C (216 °F) is higher than the normal range. The output voltage of the sensor will generate an event code for a warning, a derating, or a shutdown for high oil temperature. The sensor does not have an electronic problem.
(3) This area represents the normal operating temperature for the engine oil. The normal output voltage of the sensor is between 0.2 and 4.1 volts. Active Diagnostic Codes
An active diagnostic code represents a problem with the electronic control system. Correct the problem as soon as possible.When an active diagnostic code is generated, the "Active Alarm" indicator ("Engine Control Alarm Status" on Cat ET) is