POPPET 9T1710 - Caterpillar

This procedure covers the following codes:
Table 1
Diagnostic Trouble Codes for Injector Data Incorrect    
J1939 Code     Code Description     Comments    
651-2     Engine Injector Cylinder #01 : Erratic, Intermittent or Incorrect     The Electronic Control Module (ECM) detects an injector code that is incorrect for the engine.
If equipped, the warning lamp will come on.    
652-2     Engine Injector Cylinder #02 : Erratic, Intermittent or Incorrect    
653-2     Engine Injector Cylinder #03 : Erratic, Intermittent or Incorrect    
654-2     Engine Injector Cylinder #04 : Erratic, Intermittent or Incorrect    The following background information is related to this procedure:Injector codes are codes that are 30 hexadecimal characters in length that are supplied with each injector. The code is on a plate on the top of the injector and a card is also included in the packaging for the injector. The code is used by the ECM to balance the performance of the injectors.Refer to Troubleshooting, "Injector Code - Calibrate" for further information.
Illustration 1 g02131289
Label with an injector code
Illustration 2 g02132293
Sequence for recording the injector code
Table 2
Troubleshooting Test Steps    Values    Results    
1. Check for Diagnostic Codes
A. Connect the electronic service tool to the diagnostic connector.
B. Turn the isolator switch to the ON position.
C. Check for active diagnostic codes that are related to this procedure.
D. Check the screw for the ECM connectors for correct torque of
6 N m (53 lb in).
E. Check all of the wiring associated with the CAN data link for abrasions and pinch points.
    Damaged wire or connector     Result: One or more of the diagnostic codes that are listed in Table 1 are active at this time.
Make a note of any cylinder numbers with the active diagnostic code. Proceed to Test Step 2.
Result: None of the diagnostic codes that are listed in Table 1 are active at this time.
Return the unit to service.
   
2. Check the Injector Code on any Suspect Cylinders
A. Connect the electronic service tool to the diagnostic connector. Refer to Troubleshooting, "Electronic Service Tools".
B. Turn the isolator switch to the ON position.
C. Select the following menu options on the electronic service tool in order to obtain the injector codes from the ECM:
Service
Calibrations
Injector Trim Calibration
D. Make a note of the injector codes for any suspect cylinders.
   
Between 50 Ohms and 70 Ohms    
Result: The card that was supplied with the injector is available for the suspect cylinders.
Compare the injector code from the card with the injector code that was recorded from the electronic service tool for each suspect cylinder.
If the codes match, the injector is incorrect for the engine. Replace the injector.
If the codes do not match, then use the electronic service tool to input the code from the card.
Result: The card that was supplied with the injector code is not available.
Remove the valve mechanism cover. Refer to Disassembly and Assembly, "Valve Mechanism Cover - Remove and Install".
Make a note of the injector code that is on the injector in any suspect cylinders.
Note: Refer to Illustration 2 for the