0349504 JOHNSON *COVER, Trunnion

Table 1
Diagnostic Codes    
Code and Code Description    Conditions which Generate this Code    System Response    
246-9
Proprietary CAN Data Link : Abnormal Update Rate     All communications on the data link have been lost.     The code is logged.    
246-14
Proprietary CAN Data Link : Special Instruction     Partial communications on the data link have been lost.     The code is logged.    
247-9
SAE J1939 Data Link : Abnormal Update Rate     All communications on the data link have been lost.     The code is logged.    
247-14
SAE J1939 Data Link : Special Instruction     Partial communications on the data link have been lost.     The code is logged.    
248-9
Cat Data Link not communicating     All communications on the data link have been lost.     The code is logged.    
248-14
CAT Data Link : Special Instruction     Partial communications on the data link have been lost.     The code is logged.    
625-14
Proprietary Data Link : Special Instruction     Partial communications on the data link have been lost.     The code is logged.    
639-9
J1939 Network #1 : Abnormal Update Rate     All communications on the data link have been lost.     The code is logged.    
639-14
J1939 Network #1 : Special Instruction     Partial communications on the data link have been lost.     The code is logged.    
3050-9
Drivetrain Control : Abnormal Update Rate     All communications on the data link have been lost.     The code is logged.    
3050-14
Drivetrain Control : Special Instruction     The ECM has lost partial communications to the transmission control module over the Cat Data Link.     The code is logged.    If Cat® Electronic Technician (Cat® ET) will not communicate with the ECM, refer to Troubleshooting, "Electronic Service Tool Does Not Communicate" before you begin this procedure. The procedure will verify that electrical power is being supplied to the ECM and to the service tool connector.The data links are used to communicate information between the engine ECM and other control modules that are a part of the application. Cat ET also communicates with the ECM via the data links.The service tool connector contains connections for electrical power and for the data links.When the keyswitch is in the OFF position, Cat ET may communicate with the ECM. However, the communications may be disrupted and the communications may require frequent reconnection. In order to avoid this problem, place the keyswitch in the ON position when Cat ET is being used.Cat ET may display the following error message:"The version of the ECM is not recognized and the integrity of the changed parameters and displayed data is not guaranteed."This message indicates one of the following conditions:
The flash file in the ECM is newer than the version of Cat ET.
The latest version of Cat ET has not been installed.
Illustration 1 g03368559
Typical data link schematic
Illustration 2 g01444702
Terminal locations at the service tool connector (A) +Battery (B) -Battery (C) CAN data link global shield (D) Cat Data Link + (E) Cat Data Link - (F) CAN data link global - (G) CAN data link global +
Illustration 3 g01559974
Terminal locations at the P1 ECM connector that are for the data links (P1-8) Cat Data Link + (P1-9) Cat Data Link - (P1-34) Global CAN data link - (P1-42) Global CAN shield (P1-48) +Battery (P1-50) Global CAN data link + (P1-52) +Battery (P1-53) +Battery (P1-55) +Battery (P1-57) +Battery (P1-61) -Battery (P1-63) -Battery (P1-65) -Battery (P1-67) -Battery (P1-69) -Battery (P1-70) Keyswitch
Illustration 4 g01355248
Terminal locations at the termination resistors (A) CAN data link + (B) CAN data link - (C) Shield
Illustration 5 g03153416
Terminal locations at the engine interface connector (Terminal 5) Cat Data Link + (Terminal 6) Cat Data Link - (Terminal 28) Global CAN data link shield (Terminal 33) Global CAN data link + (Terminal 34) Global CAN data link -
Table 2
Troubleshooting Test Steps    Values    Results    
1. Inspect the Electrical Connectors and the Wiring
Note: Carefully follow this procedure in order to identify an intermittent problem.
A. Perform a visual inspection of the wiring between the P1 and P2 ECM connectors, the termination resistors, and the service tool connector. Also, inspect the wiring and the connectors at various controllers and control boxes.
Look for these problems:
-Harness damage that is caused by chafing
- Harness damage that is caused by excessive heat
-Look for moisture on the wiring and in the connectors.
- Pull on the wires that are associated with the data links.
This test verifies that the wire is properly crimped to the terminal and that the terminal is properly inserted into the connector.
   
Connectors    
Results: The wiring and the connectors appear to be OK.
Proceed to Test Step 2
Results: There is a problem with the wiring or with a connector.
Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the connector seals are properly in place and ensure that the connectors are coupled.
Verify that the repair eliminates the problem.
   
2. Bypass the Wiring for the Data Link
A. Connect the 217-0113 Wiring Harness (ECM BYPASS) to the J1 connector, to the 332-7381 Data Link Cable As , and to the battery.