CONT GP 3E3668 - Caterpillar

This procedure covers the following codes:
Table 1
Diagnostic Trouble Codes for the Aftertreatment Identification Module
J1939 Code CDL Code Code Description
(code descriptions may vary) Comments
5576-2 3468-2 Aftertreatment #1 Identification : Erratic, Intermittent, or Incorrect The Electronic Control Module (ECM) detects the following conditions:
The installed Clean Emissions Module (CEM) is not a certified match with the engine.
Diagnostic codes 5576-8 or 5576-14 are not active.
There are no active 3509 diagnostic codes.
The ECM has been powered for 2 seconds.
“This fault 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.
5576-8 3468-8 Aftertreatment #1 Identification : Abnormal Frequency, Pulse Width, or Period The ECM detects the following conditions:
No signal is detected from the aftertreatment identification module.
There are no active 3509 diagnostic codes.
The ECM has been powered for 2 seconds.
Do not continue to operate the engine with the active fault.
Engine power is derated.
5576-14 3468-14 Aftertreatment #1 Identification Number Module: Special Instruction The ECM detects the following conditions:
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.
Engine power is derated. The aftertreatment identification module communicates with the engine ECM to ensure that the correct Integrated Clean Emissions Module (IGCEM) is installed.If the total operating hours of the engine are greater than 100, the aftertreatment identification module will cease to send the signal. The diagnostic codes that are listed in Table 1 will be disabled.
Illustration 1 g06142837
Schematic for the aftertreatment identification module
Illustration 2 g02174636
View of the pin locations on the 31-pin connector and the 40-pin connector for the aftertreatment identification module
Illustration 3 g02013237
View of the pin locations on the P2 connector for the aftertreatment identification module
(18) Aftertreatment identification module signal
(36) Aftertreatment identification module return
(45) CEM 5 VDC supply
Illustration 4 g02084579
Typical example of the connector for the aftertreatment identification module
(1) 5 VDC Supply
(3) Signal
(6) GroundComplete the procedure in the order in which the steps are listed.
Table 2
Troubleshooting Test Steps Values Results
1. Check for Diagnostic Codes
A. Establish communication between the electronic service tool and the Dosing Control Unit (DCU) . Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Turn the keyswitch to the ON position.
C. Look for "-2", "-8", or "-14" active or logged codes.
Diagnostic code
Result: A 5576-2 (3468-2) or 5576-14 (3468-14) diagnostic code is active.
Proceed to Test Step 9.
Result: A 5576-8 (3468-8) diagnostic code is active.
Proceed to Test Step 2.
2. Inspect Electrical Connectors and Wiring
A. Inspect the P2/J2 connector. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
B. Inspect the 31-pin connector and the 40-pin connector. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
C. Inspect the connector for the aftertreatment identification module. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
D. Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the aftertreatment identification module.
E. Check the screw for the ECM connector for the correct torque of