BOLT 8T4170 - Caterpillar

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.Perform the following steps to determine the problem.
Table 1
Troubleshooting Test Steps Values Results
1. Repair all Active Codes
Repair
Result: A code is not active.
Proceed to Test Step 2.
Result: A code is active.
Repair: Repair or replace anything necessary.
If the problem is not resolved, proceed to Test Step 2.
2. Gather Operator Information
Information
Proceed to Test Step 3.
3. Verify that the Complaint is not due to Normal Engine Operation
Verify
Proceed to Test Step 4.
4. Perform a Visual Inspection of the Engine
A. Inspect the following items:
- Wiring
- Connectors
- Fuel level
- Fuel supply
- Engine oil level
- Engine oil supply
- Coolant level
- Intake air system
- Air exhaust system
Inspect
Result: The engine is OK.
Proceed to Test Step 5.
Result: The engine is NOT OK.
Repair: Repair or replace anything necessary.
If the problem is not resolved, proceed to Test Step 5.
5. Inspect the Electrical Connectors and the Wiring
A. Inspect for following problems:
- Damage
- Abrasion
- Corrosion
- Incorrect attachment
Inspect
Result: The connectors and wiring appear to be OK.
Proceed to Test Step 6.
Result: There is a problem with the connectors and/or wiring.
Repair: Repair or replace the connectors or wiring. Ensure that all the seals are properly in place and ensure that the connectors are coupled.
If the problem is not resolved, proceed to Test Step 6.
6. Check for Logged Codes
Codes
Result: A code is not logged.
Result: A code is logged.
- Determine if the logged diagnostic codes correlate to probable causes.
- Determine if the logged diagnostic codes occur at the same time as the symptoms.
- Determine if the logged diagnostic codes are logged repeatedly.
If these inspections do not reveal any problems, use the procedure that best describes the symptoms.