CYLINDER AS 1181951 - Caterpillar

Table 2
Required Tools
Part Number Part Name Qty
441-0451 Kit - Test 1 Probable Causes
Codes
NOx sensors
DEF quality
DEF lines
Exhaust system
Exhaust mixerRecommended Actions
Table 3
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Determine if a code is active or logged.
Codes
Result: An E1410 (1), E1411 (1), 4364-2, or 4419–2 code is active or logged.
Proceed to Test Step 2.
Result: For all active or logged codes other than an E1410 (1), E1411 (1), 4364-2, or 4419–2.
Proceed to Test Step 3.
2. Check the NOx Sensors for Proper Installation
A. Turn the keyswitch to OFF.
B. Verify that the sensors are located in the correct position.
Note : The "Engine Out NOx" sensor wiring has a black sheath. The "Tailpipe Out NOx" sensor wiring has a gray sheath.
C. If the sensors are installed in the wrong positions, install the sensors in the correct positions. Refer to Special Instruction, REHS8151 for the correct handling procedures.
D. Start the engine.
E. Connect Cat ET.
F. Select the "Selective Catalyst Reduction System".
G. Use Cat ET to perform the following diagnostic test:
-"Aftertreatment System Functional Test"
NOx Sensors
Result: The test was successful.
Return to service.
Result: The test was not successful and other codes were logged.
Repair: Troubleshoot the logged codes. Refer to Troubleshooting for the code that became active during the test.
3. Check the Diesel Exhaust Fluid (DEF) Quality
A. Measure the DEF quality. Refer to Testing and Adjusting, Diesel Exhaust Fluid Quality - Test for additional information.
DEF Quality
Result: The DEF is contaminated or the concentration is not within the acceptable range.
Repair: Drain the DEF from the tank. Refill the tank with DEF that meets ISO 22241 quality standards.
Proceed to Test Step 10.
Result: The DEF is not contaminated and the concentration is within the acceptable range.
Proceed to Test Step 4.
4. Inspect the DEF Lines for Leaks
A. Turn the keyswitch to the ON position. Do not start the engine.
B. Connect Cat ET.
C. Select the appropriate "Diesel Exhaust Fluid Control Unit (DCU)".
D. Use Cat ET to perform the following diagnostic test to pressurize the system:
- For Aftertreatment #1, perform the "Aftertreatment #1 DEF Dosing System #1 Prime Test" and "Aftertreatment #1 DEF Dosing System #2 Prime Test".
- For Aftertreatment #2, perform the "Aftertreatment #2 DEF Dosing System #1 Prime Test" and "Aftertreatment #2 DEF Dosing System #2 Prime Test".
E. Visually inspect all DEF lines from the tank to the DEF injectors. Look for pinched, damaged, or disconnected lines.
F. Turn the keyswitch to OFF.
DEF Lines
Result: The lines are not leaking, damaged, pinched, or disconnected.
Proceed to Test Step 5.
Repair: The lines are leaking, damaged, pinched, or disconnected.
Result: Repair or replace the damaged components.
Proceed to Test Step 10.
5. Perform the "DEF Dosing System Accuracy Test"
A. Turn the keyswitch to OFF. Allow 2 minutes to elapse before proceeding.
B. Remove each of the DEF injectors from the appropriate Clean Emissions Module (CEM).
C. Connect Cat ET.
D. Select the appropriate DCU.
E. Use Cat ET to perform the following diagnostic test on each DEF injector:
- "Aftertreatment DEF Dosing Injector Accuracy Test"
Refer to Testing and Adjusting, "DEF Dosing System Accuracy Test" for additional