COVER 2D7933 - Caterpillar

Table 2
Required Tools Qty
441-0451 Kit - Test 1 Probable Causes
Codes
NOx sensors
DEF quality
DEF lines
Exhaust system
Exhaust mixerRecommended Actions
Reference: Refer to Troubleshooting, System Overview (Aftertreatment Identification) for locating aftertreatment components if necessary.
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