HARNESS AS 2756763 - Caterpillar

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 Number Module: 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.
There are no other active diagnostic codes for the aftertreatment identification module.
There are no active 5 VDC supply 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 Number Module: 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 5 V supply 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 (3468-8) 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 g06101684
Schematic for the aftertreatment identification module
Not all connectors are shown. Refer to the appropriate Electrical Schematic.
Complete 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 Electronic Control Module (ECM) . Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Turn the keyswitch to the ON position.
C. Look for 5576-X (3468-X) active or logged codes.
Diagnostic code
Result: A 5576-2 (3468-2) diagnostic code is active.
Proceed to Test Step 6.
Result: A 5576-8 (3468-8) diagnostic code is active.
Proceed to Test Step 2.
Result: A 5576-14 (3468-14) diagnostic code is active.
Proceed to Test Step 6.
2. Inspect Electrical Connectors and Wiring
A. Inspect the P1/J1 connector. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
B. Inspect the connector for the aftertreatment identification module. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
C. 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.
D. Check the screw for the ECM connector for the correct torque of 6 N m (53 lb in).
E. Check the harness for abrasion and pinch points from the aftertreatment identification module back to the ECM.
Connectors and wiring
Result: There is a fault with the harness and connectors.
Repair: Repair the connectors or the harness and/or replace the connectors or the harness. Ensure that all the seals are correctly