C11, C13, C15, and C18 Industrial Engines Caterpillar

Symptom Troubleshooting

Usage:

C13 A5K

Some engine symptoms can be unrelated to the electronic control system. Gather information about the complaint that describes the symptoms. Verify that the complaint is not due to normal engine operation.

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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

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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).