SEAT 8S7599 - Caterpillar

System Operation Description:The Electronic Control Module (ECM) is the computer that controls the engine. The personality module chip contains the ECM software that controls the operation of the computer (ECM). The flash file is a software file that is downloaded into ECM memory (personality module chip) in order to program the ECM for a specific engine application.This procedure covers the following diagnostic codes:
253-02 Personality Module mismatch
254-12 Electronic Control Module Error
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 ECM is questionable.
The data for the engine lifetime totals is questionable.
The connection of any electrical equipment and the disconnection of any electrical equipment may cause an explosion hazard which may result in injury or death. Do not connect any electrical equipment or disconnect any electrical equipment in an explosive atmosphere.
Test Step 1. Check for an Active 254-12 Diagnostic Code
Turn the keyswitch to the OFF position.
Connect Caterpillar Electronic Technician (ET) to the service tool connector. Check for an active 254-12 diagnostic code.Expected Result:The 254-12 code is not active.Results:
Not active - A 254-12 code is not active. No internal error has been identified by the ECM. Proceed to Test Step 2.
Active - A 254-12 code is active. The ECM has detected an internal error.Repair: Replace the ECM. Refer to Troubleshooting, "Replacing the ECM". Verify that the problem is resolved.STOPTest Step 2. Inspect the Electrical Connectors and the Wiring
Turn the keyswitch to the OFF position.
Illustration 1 g01139425
ECM (1) J1/P1 connectors (2) J2/P2 connectors
Thoroughly inspect connectors (1) and (2). Also inspect the battery connections. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Check the allen head screw on the ECM connectors for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque value.
Check the harnesses and the wiring for abrasion and for pinch points.Expected Result:All connectors, pins and sockets are completely coupled and/or inserted and the harnesses and wiring are free of corrosion, of abrasion, and of pinch points.Results:
OK - The harnesses and the connectors appear to be OK. Proceed to Test Step 3.
Not OK - 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 are completely coupled. Verify that the repair eliminates the problem.STOPTest Step 3. Check for Diagnostic Codes
Turn the keyswitch to the ON position.
Use Cat ET to check for active diagnostic codes. Observe the "Active Diagnostic" screen on Cat ET. Wait at least 15 seconds so that any codes may become active. Look for these codes:
253-02
254-12
268-02
Verify that the engine's configuration parameters are not scrambled.Expected Result:None of the above codes are active. The configuration parameters are not scrambled.Results:
Active 253-02 code - A 253-02 diagnostic code is active. Proceed to Test Step 4.
Active 268-02 code - A 268-02 diagnostic code is active. Proceed to Test Step 5.
Scrambled parameters - The configuration parameters are scrambled. Proceed to Test Step 6.Test Step 4. Check