Caterpillar 3406E — Replacing the ECM without the Use of the ECM Replacement Feature
Repair & overhaul · Engine Control Module (ECM)
For the Caterpillar 3406E, from the Caterpillar service manual.
Applies to: Caterpillar 3406E
Before you start
- System configuration parameters must be entered before the customer specified parameters are entered, otherwise the Total Tattletale will change.
Procedure
- Ensure that the ECM is the problem by connecting a test ECM and flash program the identical personality module.
- If the test ECM repairs the problem, reconnect the suspect ECM and verify that the problem returns.
- Obtain and record customer parameters and customer passwords from the failed ECM.
- Record the injector codes from Injector Codes Calibration under the Service menu on Cat ET.
- Record ECM lifetime totals.
- Temporarily connect the new ECM by connecting both ECM connectors. Do not mount the ECM until timing calibration is performed.
- Flash program the personality module into the new ECM if not already installed.
- Obtain factory passwords when the passwords are required.
- Program the new ECM with FLS, FTS, Engine Serial Number, customer parameters and injector codes.
- Calibrate the engine timing via Service, Calibrations, Timing Calibration.
- Install the new ECM on the engine.
Tools required
- Caterpillar Electronic Technician (Cat ET) Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Caterpillar 3406E →
Source: Caterpillar service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.