BELT-SERPENTINE 1622742 - Caterpillar

Use this procedure in order to troubleshoot a low engine coolant temperature or use this procedure if the following event code is active.
Table 1
Event Code    
Code and Description    Conditions which Generate this Code    System Response    
E199(1) Low Coolant Temperature     The engine coolant temperature is below the trip point temperature for the programmed delay time.     The code is logged.    Probable Causes
Diagnostic codes and event codes
Light loads
Temperature Control Module (TCM)Recommended Actions
Table 2
Troubleshooting Test Steps     Values     Results    
1. Check for Codes
A. Connect Caterpillar Electronic Technician (ET) to the service tool connector. Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Download the "Product Status Report" from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes.
C. Determine if the diagnostic trouble code that directed to this procedure is present.
D. Look for active diagnostic codes that are associated with the system for the event code that directed to this procedure.
   
E199
   
Result: An associated code is present.
Repair: Troubleshoot any associated codes before continuing with this test.
Result: An E199 code is present.
Proceed to the next step.
Result: No active codes
STOP
   
2. Check for Light Loads
A. Consult the operator to determine the usual load factor.
   
Load
   
Result: The load factor is OK.
Proceed to the next step.
Result: The load factor is less than 50% NOT OK.
Note: This overcooling is caused by the reduced amount of heat that is produced by the engine during light loads.
Repair: Operate the engine at a load that is greater than 50%.
If the problem is not resolved, proceed to the next step.
   
Illustration 1 g01320751
Connector locations for the temperature control module (1) 8-pin connector for the motor assembly and the communications device (2) 12-pin connector for the engine harness
Illustration 2 g02554619
Removing the inspection cover from the motor assembly (3) Main shaft extension (4) Plug and O-ring seal
Illustration 3 g01321224
Table 3
Troubleshooting Test Steps     Values     Results    
3. Check the Temperature Control Module
A. Perform the following procedure:
1. Visually inspect the wiring from the temperature control module to the coolant temperature sensor and from the temperature control module to the power supply. Visually inspect the 12-pin connector and the 8-pin connector at the temperature control module. Check for a tight connection at the connectors.
B. Check for proper operation of the temperature control module:
1. Ensure that the keyswitch is in the OFF position. Turn the electrical disconnect to the OFF position.
2. Remove plug (4) from the motor assembly. Remove the inspection cover from the motor.
3. Use the appropriate wrench to rotate the main shaft extension. Ensure that the shaft rotates freely. Rotate the shaft in order to ensure that the piston is not positioned at one of the end stops of the valve.
4. Visually inspect main shaft extension (3) for rotation while you establish power to the ECM and to the keyswitch circuit. The shaft will rotate several times during the powerup sequence.
5. During the powerup sequence, listen for the valve to travel to the end stop. Listen for the piston to