SPACER-BEARING 2P7034 - Caterpillar

System Operation Description:This procedure covers the following codes:
Table 1
Diagnostic Trouble Codes
J1939 Code and Description Conditions that Generate the Code System Response
5576-2 Aftertreatment #1 Identification Number Module: Erratic, Intermittent, or Incorrect The Clean Emissions Module (CEM) is not a certified match with the engine.
Diagnostic code 5576-8 is not active.
No 3510 diagnostic codes are active.
The Electronic Control Module (ECM) has been powered for 2 seconds.
“This is a violation of the emissions regulations, and may result in severe fines and/or legal action if not corrected immediately.” Do not operate the engine with the active fault. Engine power is derated.
The code is logged.
5576-8 Aftertreatment #1 Identification Number Module: Abnormal Frequency Pulse Width or Period No signal is detected from the aftertreatment identification module.
No 3510 diagnostic codes are active.
The ECM has been powered for 2 seconds.
Do not continue to operate the engine with the active fault. The code is logged.
Engine power is derated.
5576-14 Aftertreatment #1 Identification Number Module: Special Instruction The signal from the aftertreatment identification module is invalid.
Diagnostic code 5576-8 is not active.
The ECM has been powered for 2 seconds.
Do not continue to operate the engine with the active fault. The code is logged.
Engine power is derated.
5577-2 Aftertreatment #2 Identification Number Module: Erratic, Intermittent, or Incorrect The installed CEM is not a certified match with the engine.
Diagnostic code 5577-8 is not active.
No 3510 diagnostic codes are active.
The ECM has been powered for 2 seconds.
“This is a violation of the emissions regulations, and may result in severe fines and/or legal action if not corrected immediately.” Do not operate the engine with the active fault. Engine power is derated.
The code is logged.
5577-8 Aftertreatment #2 Identification Number Module: Abnormal Frequency Pulse Width or Period No signal is detected from the aftertreatment identification module.
No 3510 diagnostic codes are active.
The ECM has been powered for 2 seconds.
Do not continue to operate the engine with the active fault. The code is logged.
Engine power is derated.
5577-14 Aftertreatment #2 Identification Number Module: Special Instruction The signal from the aftertreatment identification module is invalid.
Diagnostic code 5577-8 is not active.
The ECM has been powered for 2 seconds.
Do not continue to operate the engine with the active fault. The code is logged.
Engine power is derated. The aftertreatment identification module sends a digital signal to the engine ECM in order to ensure that the correct CEM is installed to the engine.If more than 25 hours (total operating hours) have been accumulated on the engine, the aftertreatment identification module will cease to send the signal. The diagnostic codes that are listed in Table 1 will be disabled.
Illustration 1 g02231895
Schematic for the aftertreatment identification module
Test Step 1. Check for Active Diagnostic Codes
Establish communication between the Caterpillar Electronic Technician (ET) and the ECM.
Download the "Product Summary Report" from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes. Results:
Active 5576-2 or 5577-2 - A 5576-2 or 5577-2 diagnostic code is active. Proceed to Test Step 4.
Active 5576-8 or 5577-8 - A 5576-8 or 5577-8 diagnostic code is active. Proceed to Test Step 2.
Active 5576-14 or 5577-14