ACTUATOR GP-PUMP 1838430 - Caterpillar

Cross-Reference Information for Diagnostic Codes that are Generated by the TCM
Table 3 lists the diagnostic codes that apply to the TCM. MID No. 094 is used to identify the TCM. Use Cat ET to determine the diagnostic codes that are active or logged. Then refer to the appropriate troubleshooting procedure for more information.Note: Use Cat ET to clear diagnostic codes. Keyswitch power to the engine must be cycled to complete clearing of the codes from the TCM.
Table 3
Cross-Reference from SPN-FMI Code to the Appropriate Test Procedure
MID No. 094
SPN-FMI Code and Description Troubleshooting Procedure
168-3 Battery Potential / Power Input 1 : Voltage Above Normal Troubleshooting, "Coolant Temperature Control Module - Test"
168-4 Battery Potential / Power Input 1 : Voltage Below Normal Troubleshooting, "Coolant Temperature Control Module - Test"
628-2 Program Memory : Erratic, Intermittent, or Incorrect During a self-test, the TCM has detected an internal memory fault. Replace the TCM.
630-2 Calibration Memory : Erratic, Intermittent, or Incorrect During a self-test, the TCM has detected a problem writing calibration data to memory. The TCM will continue to operate using calibration data that was stored previously. Replace the TCM during the next service interval.
2901-0 ECU Part Number : High - most severe (3) The internal temperature of the TCM has exceeded the operational range of the unit. The three-way valve is commanded to the fault position. If necessary, install heat shields or relocate the TCM.
2901-3 ECU Part Number : Voltage Above Normal The TCM has detected an electrical problem with the internal temperature sensor for the unit. The three-way valve is commanded to the fault position. Replace the TCM.
2901-4 ECU Part Number : Voltage Below Normal The TCM has detected an electrical problem with the internal temperature sensor for the unit. The TCM will continue to operate normally. Replace the TCM during the next service interval.
4193-0 Engine Coolant Pump Outlet Temperature : High - most severe (3) Troubleshooting, "Coolant Temperature Is High"
4193-2 Engine Coolant Pump Outlet Temperature : Erratic, Intermittent, or Incorrect Troubleshooting, "Coolant Temperature Control Module - Test"
4193-3 Engine Coolant Pump Outlet Temperature : Voltage Above Normal Troubleshooting, "Coolant Temperature Control Module - Test"
4193-4 Engine Coolant Pump Outlet Temperature : Voltage Below Normal Troubleshooting, "Coolant Temperature Control Module - Test" Active Diagnostic Codes
An active diagnostic code represents a problem with the electronic control system. Correct the problem as soon as possible.When the engine ECM generates an active diagnostic code, the "Active Alarm" indicator ("Engine Control Alarm Status" on Cat ET) is activated. The indicator is used to alert the operator of the active code. If the condition that generated the code is momentary, the message disappears from the list of active diagnostic codes. The diagnostic code becomes logged.Refer to Illustration 1 for an example of the operating ranges of a sensor.
Illustration 1 g01785898
Example of the typical operating range of a sensor
(1) This area represents the normal operating range of the engine parameter.
(2) In this area, the engine is operating in an unsafe operating range of the monitored parameter. An event code will