C 3500 Truck 2WD V8-6.6L DSL Turbo VIN 1 (2002)
Engine Control Module: Service and Repair
Engine Control Module Programming and Setup
1. Setup - Ensure that the following conditions have been met:
^
The battery is fully charged.
^
The ignition is ON.
2. Program the ECM using the latest software matching the vehicle. Refer to the Techline terminal/equipment users instructions.
3. If the ECM fails to program, proceed as follows:
^
Ensure that all ECM connections are OK.
^
Inspect the Techline terminal or equipment for the latest software version.
^
Attempt to program the ECM. If the ECM still cannot be programmed properly, replace the ECM. The replacement ECM must be
programmed.
4. Perform the ECM Password Learn procedure.
Refer to Engine Control Module (ECM) Programming Procedure (On-Board) or Engine Control Module (ECM) Programming Procedure
(Off-Board).
5. Reset the engine oil life monitor. Refer to GM Oil Life System - Resetting in Maintenance and Lubrication.
6. Perform the Functional Check.
Functional Check
1. Clear any diagnostic trouble codes (DTCS).
2. Perform the Diagnostic System Check-Computers and Controls Systems.
3. Start the engine and idle the engine for 1 minute.
4. Inspect for DTCs with a scan tool.
