LAMP GP-HEAD & SIGNAL 5255298 - Caterpillar

Table 1
Diagnostic Trouble Codes
CDL Codes and Description Comments
E443 (1)
High Auxiliary Pressure - least severe (1) The code is logged.
E443 (2)
High Auxiliary Pressure - moderate severity (2) The code is logged.
E443 (3)
High Auxiliary Pressure - most severe (3) The code is logged.
E445 (1)
High Auxiliary Temperature - least severe (1) The code is logged.
E445 (2)
High Auxiliary Temperature - moderate severity (2) The code is logged.
E445 (3)
High Auxiliary Temperature - most severe (3) The code is logged. Probable Causes
Codes
Operator error
System failure
Electrical connectors and/or wiring
Recommended Actions
Table 2
Troubleshooting Test Steps Value Results
1. Check for Codes
A. Use Cat® Electronic Technician (ET) to check for any logged or active diagnostic codes.
Codes
Result: There are not any codes.
Proceed to Test Step 2.
Result: There are codes logged or active.
Repair: Troubleshoot any code before continuing with this procedure.
If the problem is not resolved, proceed to Test Step 2.
2. Gather Operator Information from the Operator
Operator information
Result: Gathered all relative information from the customer that pertains the operation and symptoms of the machine.
Proceed to Test Step 3.
3. Verify that the Complaint is Not Due to Normal Engine Operation
A. Use information gathered from the customer to decide if symptoms are related to normal engine operations under different conditions. Refer to the Systems Operation for more information.
Engine operation
Result: The symptoms are related to normal engine operations.
Return the machine to service.
Result: The symptoms are not related to normal engine operations.
Proceed to Test Step 4.
4. Perform a Visual Inspection of the Engine.
A. Inspect the following items:
- Fuel level
- Fuel supply
- Engine oil level
- Engine oil supply
- Coolant level
- Intake air system
- Air exhaust system
System components
Result: The system components are OK.
Proceed to Test Step 5.
Result: The system components are NOT OK.
Repair: Make any repairs as necessary.
If the problem is not resolved, proceed to Test Step 5.
5. Check the Electrical Wiring and Connectors:
A. Inspect the wiring and connectors for the following issues:
- Damage
- Abrasion
- Corrosion
- Incorrect attachment
Electrical connectors and wiring
Result: There were electrical connectors and/or wiring that are NOT OK.
Repair: Repair or replace the electrical connectors and/or wiring as necessary.
If the problem is not resolved, contact your Technical Communicator (TC). For further assistance, the TC can confer with the Dealer Solution Network (DSN).