RING 2042845 - Caterpillar

System Operation Description:The Electronic Control Module (ECM) is the computer that controls the Caterpillar engine. The flash file contains the software that controls the operation of the ECM.The flash file is the instructions that are used by the ECM to control the engine. For this reason, updating the flash file to a different version may affect some engine functions.This procedure covers the following diagnostic codes:
253-02 Personality Module mismatch
268-02 Check Programmable ParametersAlso, use this procedure to troubleshoot the following conditions:
The integrity of the customer parameters or the system parameters in the Electronic Control Module (ECM) is questionable.
The data for the engine lifetime totals is questionable.
Illustration 1 g01120020
ECM
(1) J2/P2 connectors
(2) J1/P1 connectors
Table 1
Troubleshooting Test Steps Values Results
1. Inspect the Electrical Connectors and the Wiring
A. Remove the electrical power from the ECM.
B. Thoroughly inspect connectors (1) and (2). Inspect the battery connections. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect".
C. Check the allen head screw on each ECM connector for the proper torque. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect".
D. Check the harnesses and the wiring for abrasion and for pinch points.
Electrical Connectors and Wiring
Result: The harnesses and the connectors appear to be OK.
Proceed to Test Step 2.
Result: The wiring and/or a connector are not OK.
Repair: Repair the wiring and/or the connectors. Replace parts, if necessary. Ensure that all of the seals are properly in place and ensure that the connectors arecompletely coupled.
STOP
2. Check For Diagnostic Codes
A. Connect the Cat™ Electronic Technician (ET) to the service tool connector. Refer to electronic troubleshooting Troubleshooting, "Electronic Service Tools".
B. Restore the electrical power to the ECM.
C. Observe the "Active Diagnostic" screen on Cat ET. Wait at least 30 seconds so that any codes may become active. Look for these codes:
• 253-02
• 268-02
D. Verify that the engine's configuration parameters are not scrambled.
Diagnostic Codes
Repair: A 253-02 diagnostic code is active.
Proceed to Test Step 3.
Result: A 268-02 diagnostic code is active.
Proceed to Test Step 4.
Result: The configuration parameters are scrambled.
Proceed to Test Step 5.
3. Check the Part Number of the Flash File
A. Verify that the flash file agrees with the original engine arrangement.
Flash File
Result: The correct flash file is installed in the ECM.
Repair: The engine will not start until the 253-02 diagnostic code is cleared. Clearing this code requires factory passwords.
Acquire factory passwords. Clear the 253-02 diagnostic code. Return the engine to service.
STOP
Result: The correct flash file is not installed in the ECM.
Repair: Program the correct flash file into the ECM. Refer to programming parameters Troubleshooting, "Flash Programming". Verify that the problem is resolved.
STOP
4. Determine the Parameters that Require Programming
A. Verify that the configuration parameters are correct for the engine's application. Refer to Troubleshooting, "System Configuration Parameters".
B. Verify that the injector trim files are correct for the engine's application. Refer to programming parameters Troubleshooting, "Injector Trim File".
Parameters
Result: The configuration parameters and the injector trim files are correct.
Repair: Clear the diagnostic code and return the engine to service.
STOP
Result: The configuration parameters and/or the injector trim files are not correct.
Repair: The 268-02 diagnostic